User Manual SmartSens 3D MagIC
Contents
1. 6 ee ee ee EE RA EE RA EE EE Ee 17 5 2 HARDWARE HANDSHAKING PINS ii 18 5 2 1 DRDY Data Ready ee ke ee ee ee RE Re ee ee ee ee AA Re ee ee ee ee ee nnn 18 5 2 2 CLEAR Clear Command Register 18 5 3 SPI INTERFACE OPERATION ER ee see ee ee se ee ee see ee ee se ee ee ee ee ee ee ee ee ee 18 6 OPERATION STANDARD MODE ees ee ee ee NEE ee ee ee ee ee ek ee ee ee Gee RR ee ee ee ee Ge Re Re 21 6 1 COMMAND REGISTER ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ed ee ee ee ee ee ee 21 6 1 1 Initiate Sensor Measurement es ee es ee ee ee ee ee ee ee 21 6 1 2 Read Write to a Cycle Count Register 22 6 2 CYCLEECGOUNT REGISTERS ees ee ees es ee ee see ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 22 6 3 MAKING A MEASUREMENT ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 23 7 OPERATION LEGACY MODE ek sesse ee ee ee ee se se ee ee ee ee ee ek ee de ee Ge Re RR Ke ee ee ee Ge Re ee ee 25 7 1 COMMAND REGISTER ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 25 7 1 41 Initiate Sensor Measurement es ee es ee ee ee ee ee ee ee ee ee 25 7 1 2 Read Write to Clock Set Register ee ee se RA Ee ee ee ee ee nne 26 7 2 CLOCK SETREGISTER A 27 PD Am Clock DIVING AAA 27 SSC Me Ziele WR Le EE 28 7 3 MAKING A MEASUREMENT ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 29 SUNSTAR O O http waw sensor i c com TEL 0755 83376489 FAX 0755 833761822. 24 XINP 18 3 j XINN UI xprvn d Adv YDRVP HO AAA YINP 1 SCLK L MISO 2 YINN IS MOSI YDRVN UH Ah Micro Controller ZORVP LB AA DRDY ZINP LZ CLEAR e ZINN L ZDRVN AN DVSS REXT Figure 4 1 Typical 3D MaglC MLF Application Circuit 3D MagIC User Manual May 24 2010 Page 13 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 01 0 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con pep te NNV Forward Bias Reverse Bias Figure 4 2 Biasing Diagram A single 8 bit command from the host system configures and initiates an axis measurement from the 3D MaglC The 3D MagIC can interface with one to three sensors depending on the application requirement Unused sensor connections should remain floating A magneto inductive sensor operates in an oscillator circuit composed of an external bias resistor along with digital gates and a comparator internal to the 3D MaglC Only one sensor can be measured at a time To measure a sensor a command byte is sent to the 3D MagIC through the SPI port specifying the axis to be measured The time to complete a host specified number of oscillation cycles is measured in both the forward and reverse bias directions The 3D MagIC returns the difference between the two measurement times represented as a number in a 2 s complement for
3. 83376489 FAX 0755 83376182 E MN L szss20GI63 con SUNSTAR 1 0 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con ODIR Oscillator Direction Determines the magnetic oscillator direction if MOT is set HIGH If MOT is set LOW ODIR has no effect Used for debug only MOT Magnetic Oscillator Test When set HIGH causes the sensor oscillator selected by ASO and AS1 in the direction selected by ODIR to run continuously The COMP pin output is always enabled when MOT is HIGH When the MOT bit is set HIGH the data read segment is not supported and a new command can be received immediately MOT mode can be exited by sending a measurement command by setting CLEAR to HIGH or by receiving a NO OP command ASO AS1 0 AS0 AS1 Axis Select Determines the sensor to be measured AS1 ASO No Op see note 0 0 Channel 1 X axis 0 1 Channel 2 Y axis 1 0 Channel 3 Z axis 1 1 Note No measurement will be executed and the previous measurement will be read back if data is clocked out 7 1 2 Read Write to Clock Set Register The Command Register is defined as follows 7 6 5 4 3 2 1 RFLAG 1 RW 0 0 0 0 0 Bits 0 5 must be set LOW when RFLAG 1 R W Read Write When HIGH signifies a Read operation from the Clock Set Register When LOW signifies a Write operation to the Clock Set Register PNI Sensor Corporation Pre Rel
4. C To Peak T 6 Minute Max Time Maintained Above Temperature T T 218 C 60 120 Soak Time Within 5 Of Actual Peak Tp 10 20 Rampdown Rate 4 C Second Max a Meets IPC JEDEC J STD 020 profile recommendations 280 260 240 Ramp down 200 180 160 140 120 100 Figure 3 7 Recommended Solder Reflow Profile PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 12 of 29 SUNSTAR O O http ww sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 4 Overview and Pin Out 4 1 Overview The 3D MagIC contains drive and measurement circuitry for controlling PNI s SmartSens magneto inductive sensors interface circuitry to communicate with a host microprocessor on an SPI bus and an internal clock It is intended as a component in a SmartSens magnetic sensing circuit as show in Figure 4 1 with a detail of the biasing shown in Figure 4 2 The 3D MagIC can be used to interface from one to three sensors depending on application requirements Note The 3D MaglC typically is used in compassing applications where each channel represents a Cartesian coordinate axis x y or Z For this reason the term axis often is used instead of channel throughout this doc me IN A DEE mae Il AVDD DVDD DVDD 15 R 6 places XDRVP VBAT deel ne
5. E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con List of Figures Figure 3 1 Gain vs Cycle Counts ees ees ee ee AR aaa aaa ee ee aaa ee ee Re ee ee ee be ee ee ee ee ee 8 Figure 3 2 Maximum Data Rate per Axis vs Cycle Counts ees see ee es ee ee ee ee Re ee ee ee ee ee 8 Figure 3 3 3D MaglC MLF Mechanical Drawing iese esse ee ee ee AR ee AR ee ee Re ee ee ee ee 9 Figure 3 4 3D MaglC MLF Tape Dimensions ees ese ee ee ee ee ee ee ee ee ee ee ee ee ee 10 Figure 3 5 3D MaglC Die Pad Layout 10 Figure 3 6 Example Wire Bonding Layout for Legacy 11096 ASIC Applications sesse 11 Figure 3 7 Recommended Solder Reflow Profile 12 Figure 4 1 Typical 3D MaglC MLF Application Circuit EEN 13 Figure 4 2 Biasing Diagramm esse ee ee AA ee EA ee EE 14 Figure 5 1 SPI Measure Read Data Timing Diagram Standard Mode ee see 19 Figure 5 2 SPI Measure Read Data Timing Diagram Legacy Mode 19 Figure 5 3 SPI Read Write Data Timing eee aaa aaa aaa aaa aaa 20 List of Tables Table 3 1 Absolute Maximum Ratings NENNEN 6 Table 3 2 Recommended Operating Conditions vu 6 Table 3 3 Electrical Characteristics deen ee ee ee ee ae NEEN 7 Table 3 4 Recommended Solder Processing Parameters ee es se ede se ke ee ee ee ke ee ee 12 Table 4 1 3D MagIC Pin Assignment ENEE ENN 16 Table 5 1 Timing Specifications ENNEN ENEE 20 T
6. http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 5 2 Hardware Handshaking Pins 5 2 1 DRDY Data Ready It is recommended the DRDY pin be used to ensure data is read out of the 3D MagIC only when it is available After the Initiate Sensor Measurement command has been sent the DRDY pin will go HIGH when the measurement is complete This signals the host system that data is ready to be read The DRDY pin should be set LOW sometime prior to initiating another measurement This is done by clearing the Command Register by either of the following actions e externally by toggling the CLEAR pin or e internally after reading or writing to the Clock Set Register Note If anew command sequence is started before the previous measurement has completed before DRDY goes HIGH the previous command will be overwritten This will also stop the measurement cycle If you try to send a new command during the readout phase after DRDY goes HIGH the command will be ignored until all 16 bits have been clocked our or the CLEAR pin is set HIGH then LOW again 5 2 2 CLEAR Clear Command Register To initiate a clear command the CLEAR pin must be toggled LOW HIGH LOW CLEAR is usually LOW A CLEAR will clear the Command Register and reset the DRDY pin to LOW CLEAR can be used to stop any sensor measurem
7. to the specifications or manufacturing processes that affect form fit or function of the Product without written notice to the Customer however PNI may at any time without such notice make minor changes to specifications or manufacturing processes that do not affect the form fit or function of the Product This warranty will be void if the Products serial number or other identification marks have been defaced damaged or removed This warranty does not cover wear and tear due to normal use or damage to the Product as the result of improper usage neglect of care alteration accident or unauthorized repair THE ABOVE WARRANTY IS IN LIEU OF ANY OTHER WARRANTY WHETHER EXPRESS IMPLIED OR STATUTORY INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF MERCHANTABILITY FITNESS FOR ANY PARTICULAR PURPOSE OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL SPECIFICATION OR SAMPLE PNI NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY If any Product furnished hereunder fails to conform to the above warranty Customer s sole and exclusive remedy and PNI s sole and exclusive liability will be at PNI s option to repair replace or credit Customer s account with an amount equal to the price paid for any such Product which fails during the applicable warranty period provided that i Customer promptly notifies PNI in writing that such Product is defective and furnishes an explanation of the deficiency ii such Product is r
8. 096 ASIC the 3D MagIC starts in the Idle Mode at power up and remains in Idle Mode until a measurement is needed Therefore it is not necessary to cycle the 3D MaglC through one measurement request operation to ensure it is in Idle Mode as was required by the legacy 11096 ASIC 4 3 3D MagIC Pinout and Connections The 3D MaglC s pinout is summarized in Table 4 1 Pin numbers run counterclockwise when looking from the top starting at the Pin 1 designator as shown in Figure 3 3 3D MagIC User Manual May 24 2010 Page 15 of 29 SUNSTAR O O http waw sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con Table 4 1 3D MagIC Pin Assignments MLF Pin Die Pad Pin Name Description 1 1 MOSI SPI interface Master Output Slave Input Serial Data 2 2 NC Do not connect 3 3 SSN SPI interface Active low to select port 4 4 AVDD Supply voltage for analog section of ASIC 5 5 AVss Ground pin for analog section of ASIC 6 6 ZDRVP Z sensor drive output 7 7 Zine Z sensor measurement input 8 8 ZINN Z sensor measurement input 9 9 ZoRVN Z sensor drive output 10 10 Yorve Y sensor drive output 11 11 YINP Y sensor measurement input 12 12 MODE Mode Select tie to DVss for Standard DVpp for Legacy 13 13 YJN
9. Figure 3 5 3D MagIC Die Pad Layout PNI Sensor Corporation 3D MagIC User Manual May 24 2010 Pre Release Version Page 10 of 29 SUNSTAR O O http www sensor i c con TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 O 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con SSN MOSI MISO SCLK DVDD REXT DRDY CLEAR AVDD DVSS AVSS g 3D MaglC Die XDRVN ZDRVP XINN XINP ZINP ZINN ZDRVN YINP MODE YINN YDRVP YDRVN XDRVP Figure 3 6 Example Wire Bonding Layout for Legacy 11096 ASIC Applications Note that Figure 3 6 is for illustrative purposes only The sample bond pad layout was taken from a PNI product The customer s bond pad layout will vary as will the best layout for the customer s application 3D MaglC User Manual May 24 2010 Page 11 of 29 SUNSTAR O O http waw sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 3 4 Soldering Table 3 4 Recommended Solder Processing Parameters Reflow Parameter Temperature C TIME sec Preheat Temperature Tsmin TO Tsmax 150 C 200 C 60 180 Temperature T Typical Lead Free Solder Melting Point SES Tsmax To T Ramp Up Rate 3 C Second Max Peak Temperature T lt 260 C Time 25
10. N Y sensor measurement input 14 14 YDRYN Y sensor drive output 15 15 Xprve X sensor drive output 16 16 XINP X sensor measurement input 17 17 XINN X sensor measurement input 18 18 XKDRYN X sensor drive output 19 19 DVss Ground pin for digital section of ASIC 20 NC Do not connect 20 21 NC Do not connect 21 22 NC Do not connect 22 23 CLEAR Clear Command Register 23 24 DRDY Data ready command 24 25 COMP na output used for debugging and generally not 25 26 Rext External timing resistor for high speed clock 26 27 DVpo Supply voltage for digital section of ASIC 27 28 SCLK SPI interface Serial clock input 28 29 MISO SPI interface Master Input Slave Output PNI Sensor Corporation Pre Release Version 3D MaglC User Manual May 24 2010 Page 16 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 5 SPI Interface Data flow to and from the 3D MagIC is through a synchronous serial interface that adheres to the SPI bus protocol The user also may implement hardware handshaking but this is optional This section reviews the SPI interface and hardware handshaking 5 1 SPI Pins 5 1 1 SCLK Serial Clock Input An SPI input is used to synchronize the data sent in and out through the MISO and MOSI pins SCLK is generated by the customer supplied master device and
11. RE SA TERS Keen E I LA Wm COMMAND MOS R T as RETURN BYTE REPLY DATA rem ry RBG H res RBA RB3 RB2 RB1 RBO HE D23 D22 D21 y D20 y D19 Dis D17 Drei DO L ke tszb ke DRDV DRDY a NAC X DON T CARE COMMAND CYCLE REPLY CYCLE Figure 5 1 SPI Measure Read Data Timing Diagram Standard Mode SHDZ i too Start Measurement and Read Measure Data Sa __ SSN can go HIGH between measurement i R command and data read segments ma SSN Ve i Kae og 2 a tom CLEAR Le tssov 4 de SCLK Z K ma vos ma K 5X 4 e je ODE S COM MAND BYTE ww R ZE G EE EE COMMAND CYCLE RETURN BYTE 0x9B DRDY Figure 5 2 SPI Measure Read Data Timing Diagram Legacy Mode 3D MagIC User Manual May 24 2010 Page 19 of 29 SUNSTAR O O http waw sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con i tsspv SCK Lt 5 PSH i i keng be i SEA aen ji MO woe baten e Lalatstatsieitstetstetstetst
12. SUNSTAR 1 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con User Manual SmartSens 3D MagIC Sensor Controller ASIC TONI SENSOR CORPORATION SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con Table of Contents 1 COPYRIGHT amp WARRANTY INFORMATION oes ee ee ss ee ee ee ee ee ee EE ee Ge EK ee Ke Ee ER EE ee A 2 INTRODUGTION EE 5 3 SPECIFICATIONS zi a SE ee EEN See 6 3 1 DEVICE CHARACTERISTICS ee ee ee ee ee se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 6 3 2 TYPICAL OPERATING CHARACTERISTICS ee ee ee ee ee ee se ee ee ee ee ee ee ee 8 3 3 DIMENSIONS AND PACKAGING ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 9 3 4 SOLDERING ii ie SR aa AEK PALA Raki 12 4 OVERVIEW AND PIN OUT aoeaeenonn ama aa aa nana nan aa nana ee ee ee ee EER Ke ee ee Ge ee ENN 13 4 1 OVERVIEW ee Sf ee 13 4 2 en Tee ny i oe 15 4 3 3D MAGIC PINOUT AND CONNECTION 15 5 SPI INTERFACE oes ese en ee ese se nee ket ese gee EE ke kk ee Roe se ke ge gee ee tun EE Dee 17 5 1 Sede hn OE N AA 17 5 1 1 SCLK Serial Clock Input EN 17 5 1 2 SSN Slave Select see ED see ee ED ee EED ee ee ee ee 17 5 1 3 MISO Serial Out BEE 17 5 1 4 MOSI Serial In
13. able 6 1 Cycle Count Registers ee ee se ENEE 23 3D MagIC User Manual May 24 2010 Page 3 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 1 Copyright amp Warranty Information Copyright PNI Sensor Corporation 2010 All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under copyright laws Revised April 2010 for the most recent version visit our website at www pnicorp com PNI Sensor Corporation 133 Aviation Blvd Suite 101 Santa Rosa CA 95403 USA Tel 707 566 2260 Fax 707 566 2261 Warranty and Limitation of Liability PNI Sensor Corporation PNI manufactures its Products from parts and components that are new or equivalent to new in performance PNI warrants that each Product to be delivered hereunder if properly used will for ninety 90 days following the date of shipment unless a different warranty time period for such Product is specified i in PNI s Price List in effect at time of order acceptance or ii on PNI s web site www pnicorp com at time of order acceptance be free from defects in material and workmanship and will operate in accordance with PNI s published specifications and documentation for the Product in effect at time of order PNI will make no changes
14. aneously the 3D MagIC will present a fixed OX9A on the MISO pin Once the 8 bits have clocked in the 3D MagIC will execute the command i e take a measurement 3 The SSN input may be returned HIGH at this point to free up host communication with another device if desired This will not affect the measurement process 4 A measurement is taken which consists of forward biasing the sensor and measuring how long it takes to accomplish the pre defined number of cycle counts then reverse biasing the sensor and measuring again and then taking the difference in time between the two directions and presenting this value 5 At the end of the measurement the DRDY pin is set HIGH indicating data is ready and the 3D MagIC is placed in Idle Mode 6 The SSN input should be set LOW if it is not already to read the data 7 The data is clocked out on the MISO pin with the next 24 clock cycles If another measurement is to be made immediately the SSN pin can remain low and the process repeated starting at line 2 above Otherwise it generally is recommended to set the SSN pin HIGH to release the SPI serial bus PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 24 of 29 SUNSTAR O O http www sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 7 Operation Legacy Mode Th
15. e 3D MagIC will operate in Legacy Mode when pin 12 is held HIGH connected to DVpp The intent of Legacy Mode is to enable the user to easily substitute PNI s 3D MagIC for PNI s legacy 11096 ASIC p n 12576 This section discusses how to operate the 3D MagIC in Legacy Mode For a description of operation in Standard Mode see Section 6 7 1 Command Register The Command Register can be used either to initiate a sensor measurement or set up a read write to the Clock Set Register It consists of one byte Bit 7 is the Register Access Flag RFLAG and this controls whether a sensor measurement will be initiated or a read write to the Clock Set Register will be initiated The setting of bits 0 6 depends on how RFLAG is set 7 1 1 Initiate Sensor Measurement The Command Register is defined as follows 7 6 5 4 3 2 1 0 RFLAG 0 PS2 PS1 PSO ODIR MOT AS1 ASO PSO PS2 Period Select Selects the number of sensor circuit oscillation cycles periods to be counted while simultaneously using the internal fixed reference clock to measure the time to obtain this count Period Select Cycle PS2 PS1 PSO Value Counts 0 32 0 0 0 1 64 0 0 1 2 128 0 1 0 3 256 0 1 1 4 512 1 0 0 5 1024 1 0 1 6 2048 1 1 0 7 4096 1 1 1 3D MagIC User Manual May 24 2010 SUNSTAR O O http www sensor i c com TEL Page 25 of 29 0755
16. e individually configured for measurement resolution For most applications the SmartSens MI sensor serves as the inductive element in a simple LR relaxation oscillation circuit with its effective inductance proportional to the magnetic field parallel to the sensor axis When driven by the 3D MagIC the frequency of oscillation varies with the strength of the magnetic field parallel to the sensor The output from the 3D MagIC is inherently digital and can be fed directly into a microprocessor which eliminates the need for signal conditioning or an analog digital interface between the sensor and a microprocessor The simplicity of the SmartSens circuit combined with the lack of signal conditioning makes it easier and less expensive to implement than alternative fluxgate or magneto resistive MR technologies Since the SmartSens circuit works in the frequency domain resolution and noise are established cleanly by the number of cycle counts In comparison fluxgate and MR technologies require expensive and complex signal processing to obtain similar resolution and noise and for certain applications the SmartSens solution cannot be matched 3D MagIC User Manual May 24 2010 Page 5 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 3 Specifications 3 1 Device Characte
17. ease Version 3D MagIC User Manual May 24 2010 Page 26 of 29 SUNSTAR O O http www sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 7 2 Clock Set Register Note If a user incorporates the 3D MagIC in a legacy 11096 ASIC system and uses the same Period Select value and leaves the Counter Divide and Period Dividevalues at their default values then the oe will provide approximately the same resolution as PNI s legacy ASIC at the same data The Clock Set Register commands allow the user to operate the 3D MaglC in Legacy Mode similar to PNI s legacy ASIC but derive some of the benefits available with the 3D MagIC Specifically due to the higher clock speed 30 MHz vs 2 MHz of the MagIC it is capable of providing either higher resolution for the same acquisition time data rate or comparable resolution for a shorter acquisition time This is done by varying the Clock Divide and Period Divide values in the Clock Set Register And since power consumption is directly correlated to acquisition time this means an existing system can run with lower power consumption while retaining comparable resolution Specifically setting the Clock Divide to 1 and making no other changes provides a theoretical increase in resolution of 16x without altering the data rate Alternatively setting the Clock Divide to 1 and
18. ent in progress CLEAR has no effect on the SPI register state Note The CLEAR pin is similar to the RESET pin on PNI s legacy ASIC However reading or writing to the Clock Set Register also will clear the Command Register Consequently it is not necessary to utilize the CLEAR pin if the host system will read or write to the Clock Set Register to clear the Command Register 5 3 SPI Interface Operation When implementing an SPI port whether a dedicated hardware peripheral port or a software implemented port using general purpose I O also known as Bit Banging the timing parameters given in Figure 5 1 Figure 5 2 and Figure 5 3 must be met to ensure reliable communications When SCLK is LOW the data is in transition The clock set up and hold times tpssH and tpasy must be greater than 50 ns The clock phase used with the 3D MagIC is zero CPOL 0 Data is present on MISO or should be presented on MOSI before the first low to high clock transition PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 18 of 29 SUNSTAR O O http ww sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con SSN can go HIGH between measurement 810Z 5 a command and data read segments SSN I tsspv toy sek_ ELE DIE RI S A
19. eturned to PNI s service facility at Customer s risk and expense and iii PNI is satisfied that claimed deficiencies exist and were not caused by accident misuse neglect alteration repair improper installation or improper testing If a Product is defective transportation charges for the return of the Product to Customer within the United States and Canada will be paid by PNI For all other locations the warranty excludes all costs of shipping customs clearance and other related charges PNI will have a reasonable time to make repairs or to replace the Product or to credit Customer s account PNI warrants any such repaired or replacement Product to be free from defects in material and workmanship on the same terms as the Product originally purchased Except for the breach of warranty remedies set forth herein or for personal injury PNI shall have no liability for any indirect or speculative damages including but not limited to consequential incidental punitive and special damages relating to the use of or inability to use this Product whether arising out of contract negligence tort or under any warranty theory or for infringement of any other party s intellectual property rights irrespective of whether PNI had advance notice of the possibility of any such damages including but not limited to loss of use revenue or profit In no event shall PNI s total liability for all claims regarding a Product exceed the price paid for the Prod
20. following section 6 2 Cycle Count Registers The Cycle Count Registers establish the number of sensor oscillations cycles that will be counted for each sensor during a measurement sequence Varying the cycle count allows the user to increase measurement resolution higher cycle counts or increase the data rate lower cycle counts Each sensor is represented by two registers with addresses defined as follows PNI Sensor Corporation 3D MagIC User Manual May 24 2010 Pre Release Version Page 22 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con Table 6 1 Cycle Count Registers REGISTER DESCRIPTION REGISTER NAME ADDRESS CCPX1 X Axis Cycle Count Value MSB 3H CCPX0 X Axis Cycle Count Value LSB Au CCPY1 Y Axis Cycle Count Value MSB 5H CCPYO Y Axis Cycle Count Value LSB Du CCPZ1 Z Axis Cycle Count Value MSB TH CCPZO Z Axis Cycle Count Value LSB 8H An example of a command sequence to set the cycle count value to 100p 644 for all 3 axes is as follows Note that since the registers are adjacent it is not necessary to send multiple Command Register commands as the 3D MaglC will automatically read write to the next adjacent register Set SSN to LOW Send 0x83 this is the Command Register byte amp addresses the MSB for
21. is set HIGH the data read segment is not supported and a new command can be received immediately MOT mode can be exited by sending a measurement command by setting CLEAR to HIGH or by receiving a NO OP command ASO AS1 0 AS0 AS1 Axis Select Determines the sensor to be measured 3D MagIC User Manual May 24 2010 Page 21 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con AS1 ASO No Op see note 0 0 Channel 1 X axis 0 1 Channel 2 Y axis 1 0 Channel 3 Z axis 1 1 Note If no measurement is executed then the previous measurement will be read back if data is clocked out 6 1 2 Read Write to a Cycle Count Register The Command Byte is defined as follows 7 6 5 4 RFLAG 1 RW ADR3 ADR2 ADR1 ADRO R W Read Write HIGH signifies a Read operation from the addressed register LOW signifies a Write operation to the addressed register ADRO ADR3 Register Address Bits Establishes which register will be written to or read from When adjacent registers are to be addressed which is typically is the case it is not necessary to reinitiate the command sequence as the 3D MaglC automatically will read write to the next adjacent register See the example in the
22. mat and this number is directly proportional to the direction and strength of the local magnetic field The 3D MaglC s output provides the difference in the high speed oscillator cycles between the forward biased and reverse biased sensor measurements To make a measurement one side of the sensor is grounded while the other side is alternately driven with positive and negative current through the oscillator The number of circuit oscillations cycle counts is user defined in software and establishes how many oscillations of the RL circuit are desired per measurement The greater the cycle counts the higher the resolution of the measurement and the longer the sample time The high speed oscillator measures how long it takes to make the desired number cycle counts The 3D MagIC next switches the bias connection to the sensor and makes another measurement The side that was previously grounded is now charged and discharged while the other is now grounded PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 14 of 29 SUNSTAR O O http www sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 4 2 Idle Mode The 3D MagIC incorporates an Idle Mode to reduce power consumption in which it automatically idles when it is not exchanging data or taking a measurement Unlike the legacy 11
23. ment is to be made immediately the SSN pin can remain low and the process repeated Otherwise it generally is recommended to set the SSN pin HIGH to release the SPI serial bus 3D MagIC User Manual May 24 2010 Page 29 of 29 SUNSTAR O O http www sensor i c con TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con
24. oetetet i Command Cycle Return byte 0x98 i Write Data AE KA ar o 56 u e ee or o tests W y Read Data Atten 0 gt lt Address 1 n gt COMMAND CYCLE READ WRITE CYCLE Figure 5 3 SPI Read Write Data Timing Table 5 1 Timing Specifications SYMBOL DESCRIPTION MIN TYP MAX UNITS tsc Time from SSN to CLEAR 10 ns temin CLEAR duration 100 ns tsspv Time from SSN to Command Byte on MOSI 1 us tpBsH Time to setup data before active edge 50 ns tpasH Time to setup data after active edge 50 ns tsuDZ Time from SSN to data tri state time 100 ns Note that an SPI port can be implemented using different clock polarity options The clock polarity used with the 3D MagIC should be low CPOL 0 Generally data is considered valid while SCLK is high and when SCLK is low data is in transition As previously noted keeping the SSN pin LOW dedicates the master device to the 3D MagIC If the user has no other slave devices the SSN pin can be permanently grounded Conversely if the user has multiple slave devices then the SPI bus can be freed up for other devices by bringing the SSN pin HIGH The SSN pin can be brought HIGH either e after sending the command word on the MOSI pin but before reading the measurement data on the MISO pin and or e after receiving the measurement data on the MISO pin PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 20 of 29 SUNSTAR O O http
25. ounter Divide or Period Divide they should do this separately by sending a command to the Clock Set Register I Legacy Mode the 3D MaglC returns the result of a complete forward reverse measurement of the sensor in a 16 bit 2 s complement format range 32768 to 32767 Note that only one sensor can be measured at a time and that SSN pin is set LOW This enables communication with the master device 2 CLEAR pin is set HIGH then LOW This is not required but is optional to maintain compatibility with the legacy 11096 ASIC 3 A command byte is clocked into the 3D MagIC on the MOSI pin Simultaneously the 3D MagIC will present a fixed 0x9B on the MISO pin Once the 8 bits have clocked in the 3D MagIC will execute the command i e take a measurement 4 The SSN input may be returned HIGH at this point to free up host communication with another device if desired This will not affect the measurement process 5 A measurement is taken which consists of forward biasing the sensor and making a period count then reverse biasing the sensor and counting again and then taking the difference between the two directions and presenting this value 6 At the end of the measurement the DRDY pin is set HIGH indicating data is ready and the 3D MagIC is placed in Idle Mode 7 The SSN input should be set LOW if it is not already to read the data 8 The data is clocked out on the MISO pin with the next 16 clock cycles 9 If another measure
26. rameter Symbol Min Typ UEDA Units Average Operating Current loom 0 25 mA Idle Mode Current Jop 1 HA Leakage Current Ibvpp 100 nA High level input voltage Vu 0 7 DVpp Vop V Low level input voltage Vit 0 0 3 DVpp V High level output current lon 1 mA Low level output current lo 1 mA SA Oscillation SCosc 185 kHz Internal Oscillator Frequency OSCFREQ 45 MHz Note 1 Bias resistance is to be determined but expected to be in the range of 500 to 700 2 Polling rate of 8 Hz cycle count of 1024 and Fast Bias mode 3 When 3D MaglC is used in conjunction with Sen XY or Sen Z sensor and appropriate bias resistor Circuit oscillation frequency will vary depending on a number of factors including the strength of the ambient magnetic field 3D MagIC User Manual May 24 2010 Page 7 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 3 2 Typical Operating Characteristics Note that Cycle Counts is set by the user through the Cycle Count Registers in Standard Mode or the Counter Divide CD bits in the Legacy Mode s Clock Set Register 1000 Standard amp Legacy wi CD 1 Legacy w CD 16 default Q Gain counts uT a 10 100 1000 10000 Cycle Counts Figure 3 1 Gain vs Cycle Counts Resolution 1 Gain to the
27. ristics Table 3 1 Absolute Maximum Ratings Parameter Symbol Minimum Maximum Analog Digital DC Supply AVpp Voltage Don 3 ER Input Pin Voltage VIN 0 3 AVpp or DVpp Input Pin Current 25C lin 10 0 10 0 Storage Temperature Terme 40 125 CAUTION Stresses beyond those listed above may cause permanent damage to the device These are stress ratings only Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability Table 3 2 Recommended Operating Conditions Parameter Symbol Min Typ WEY Units es AVDD Analog Digital DC Supply Voltage DV 1 6 3 3 3 6 VDC Supply Voltage During Operation AVpp_oP 0 1 0 0 1 VDC Difference DVoo AVpp Analog Unpowered AVpp_orr DVpp 0 1 DVpo DVppt0 1 VDC Bias Resistance Vpp 3 3V Rb 68 Q External Timing Resistor for Clock Rext 33 kQ Operating Temperature Top 40 85 C PNI Sensor Corporation 3D MaglC User Manual May 24 2010 Pre Release Version Page 6 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con Table 3 3 Electrical Characteristics Pa
28. setting the Period Divide to 16 provides nominally the same resolution but at 1 16 the acquisition time which is useful for high speed applications and or applications that are sensitive to power consumption The Command Register is defined as follows PCS2 PCS1 PCSO 0 CD2 CD1 CDO 7 2 1 Clock Divide The 3D MagIC s high speed clock runs at nominally 32 MHz but PNI s legacy ASIC runs at nominally 2 MHz Consequently when the 3d MagIC is in default Legacy Mode the clock speed is divided by 16 to bring it down to an effective clock speed of 2 MHz same as the legacy 11096 ASIC The Clock Divide bits allow the user to alter the divisor for the high speed clock Setting the Clock Divide bits all to 0 results in high speed clock operating at its full speed Below is a table that summarized the clock divide values for given Clock Divide bits 3D MagIC User Manual May 24 2010 Page 27 of 29 SUNSTAR O O http www sensor i c con TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con Clock Divide Value CD2 CD1 CDO 16 16 16 16 a A AIOIOIOIO a O O sech m El CH a O lt O lt O O 7 2 2 Period Divide The Period Divide divides the Period Select value by
29. should be 1 MHz or less One byte of data is exchanged over eight clock cycles Data is captured by the master device on the rising edge of SCLK Data is shifted out and presented to the 3D MaglC on the MOSI pin on the falling edge of SCLK 5 1 2 SSN Slave Select This signal sets the 3D MagIC as the operating slave device on the SPI bus The SSN pin must be LOW prior to data transfer in either direction and must stay LOW during the entire transfer The SPI bus can be freed up SSN pin set HIGH for communication with another slave device while the 3D MagIC is taking a measurement or idle but after all communication between the 3D MaglC and master device is finished If the 3D MagIC is the only device on the SPI bus this pin may be permanently grounded 5 1 3 MISO Serial Out An SPI output that sends data from the 3D MagIC to the master device Data is transferred most significant bit first and is captured by the master device on the rising edge of SCLK The MISO pin is placed in a high impedance state if the 3D MagIC is not selected i e if SSN 1 5 1 4 MOSI Serial In An SPI input that provides data from the master device to the 3D MaglC Data is transferred most significant bit first Data must be presented at least 50 ns before the rising edge of SCLK and remain valid for 50 ns after the edge New data may be presented to the MOSI pin on the falling edge of SCLK 3D MagIC User Manual May 24 2010 Page 17 of 29 SUNSTAR O O
30. system s noise limit 10000 1000 100 Maximum Data Rate per Axis Hz 10 100 1000 10000 Cycle Counts Figure 3 2 Maximum Data Rate perAxis vs Cycle Counts PNI Sensor Corporation Pre Release Version 3D MaglC User Manual May 24 2010 Page 8 of 29 SUNSTAR O O http www sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 3 3 Dimensions and Packaging Dimensions in mm 5 0 40 15 Top view as 40 1 J 0 2 0 02 0 9 0 05 Side view 0 625 0 125 Pin 1 t e m LD 0 5 0 06 EW gt Bottom view 0 28 max re 5 36 3 48 328 3 18 EE max min max TH Y PCB Land pattern Figure 3 3 3D MagIC MLF Mechanical Drawing 3D MagIC User Manual May 24 2010 Page 9 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 01 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con e 3 0 1 0 0 8 00 2 00 05 SEE NOTE 3 4 00 SEE NOTE I 6 1 50 MIN 0 30 05 AT R 0 3 MAX f DOO O O QO LT 10 9 50 t 05 SEE NOTE 3 KS 12 043 f me Ko 5 thousand per reel Notes 1 10 sprocket hole pitch cumulative
31. the Period Divide value The default is 1 which leaves the number of cycle counts to be counted unchanged PCS Value PCS2 PCS1 PCSO 1 0 0 0 2 0 0 1 4 0 1 0 8 0 1 1 16 1 0 0 16 1 0 1 16 1 1 0 16 1 1 1 The Period Divide can be used to run the 3D MagIC at fewer cycles than allowed by the Period Select For example a Period Select value of 0 dictates that 32 cycles will be counted By setting the Period Divide value to 16 the number of cycles is reduced to 2 cycles which represents the fewest number of cycles possible with the 3D MagIC Fundamental resolution also will have decreased by a factor of 16 by doing this This can be very useful for high speed applications such as video gaming that require frequent data updates PNI Sensor Corporation 3D MagIC User Manual May 24 2010 Pre Release Version Page 28 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 7 3 Making a Measurement The steps to make a sensor measurement are given below and the sequence and timing are given in Figure 5 3 and Figure 5 3 In general the user sends an Initiate Sensor Measurement command to the 3D MagIC through the SPI interface specifying the sensor to be measured and the Period Select If the user wants to alter the C
32. the X axis Send 0 this is the MSB for the X axis Send 0x64 this is the LSB for the X axis Send 0 this is the MSB for the Y axis Send 0x64y this is the LSB for the Y axis Send 0 this is the MSB for the Z axis Send 0x64 this is the LSB for the Z axis Set SSN to High O FP SP R N PRA The default for all three axes is a cycle count value of 512p LSB 04 MSB 204 6 3 Making a Measurement The steps to make a sensor measurement are given below and the sequence and timing are given in Figure 5 1 and Figure 5 3 In general the user sends an Initiate Sensor Measurement command to the 3D MagIC through the SPI interface specifying the sensor to be measured The Cycle Count Registers should already be set prior to sending this command or the default values will be used In Standard Mode the 3D MagIC returns the result of a complete forward reverse measurement of the sensor in a 24 bit 2 s complement 3D MagIC User Manual May 24 2010 Page 23 of 29 SUNSTAR O O http www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 01 0 0 0 http waw sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con format range 8388608 to 8388607 Note that only one sensor can be measured at a time 1 SSN pin is set LOW This enables communication with the master device 2 The Initiate Sensor Measurement byte is clocked into the 3D MagIC on the MOSI pin Simult
33. tolerance 0 2 Ao 5 25 Tolerances Unless Noted 2 Camber in compliance with EIA 481 Bo 5 25 1PL 2 3 Pocket position relative to sprocket hole measured as Ko 1 10 2PL 10 true position of pocket not pocket hole All dimensions in millimeters Figure 3 4 3D MaglC MLF Tape Dimensions Dimensions in um microns wo o o o fio ls E R o N 5 lo 5 S Jo Els BIS G E Els fk fe D LO d st LO LO 00 eo co Te CO CO s 1 m H e N gt e gt RR OT 4 Saal BNS TE oos ks l JS ze h RR le ola vo REUS sez le Alu al Su SEAT Su 2x ojx A lt X amp x OxQ0 x ojx E E MOSI m X 0 0 Y 1694 65 DO NOT CONNECT SSN u X 0 0 Y 1274 05 AVDD a X 0 0 Y 1000 6 AVSS X 0 0 Y 760 1 ZDRVP X 0 0 Y 514 425 ZINP sa X 0 0 Y 159 05 E E E o lo 2 e IS e js s jw FIT o o BI T gt gt gt s j gt gt AE II gt gt gt ite Te Te gt EJ LO LO N N LO N N LO SEE EE eae 5 EERS IE we ZE ZE Si Gin n Zil Ou Zlu glu His NIX zizzlz AK zl HIK NOTES a DO NOT CONNECT a DO NOT CONNECT a DO NOT CONNECT DVSS X 1854 0 Y 1057 8 XDRVN X 1854 0 Y 860 05 XINN X 1854 0 Y 653 55 BE XINP X 1854 0 Y 408 6 E XDRVP X 1854 0 Y 202 1 The origin 0 0 is the lower left coordinate of the center pads The chip size 2080 0 um x 2080 0 um is calculated using pad to scribe distance
34. uct PNI neither assumes nor authorizes any person to assume for it any other liabilities Some states and provinces do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may have other rights that vary by state or province PNI Sensor Corporation Pre Release Version 3D MagIC User Manual May 24 2010 Page 4 of 29 SUNSTAR O O http www sensor i c conh TEL 0755 83376489 FAX 0755 83376182 E MN L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 2 Introduction Thank you for purchasing PNI Sensor Corporation s SmartSens 3D MaglC The 3D MagIC is a control and measurement ASIC for use with PNI s SmartSens magneto inductive MI sensors the Sen XY and Sen Z and represents a dramatic step forward in terms of data rate and power consumption when compared to PNI s prior legacy ASIC It contains drive and measurement circuitry for interaction with SmartSens sensors interface circuitry to communicate with a host microprocessor on an SPI bus an internal clock and inputs for a user supplied external clock or crystal oscillator The 3D MaglC can control and measure three independent SmartSens sensors Each SmartSens sensor is individually selectable for measurement and can b
35. www sensor i c com TEL 0755 83376489 FAX 0755 83376182 E MI L szss20 63 con SUNSTAR 1 0 0 0 http www sensor ic con TEL 0755 83376549 FAX 0755 83376182E MN L szss20G163 con 6 Operation Standard Mode The 3D MagIC operates in Standard Mode when pin 12 is held LOW grounded to DVss This section discusses how to operate the 3D MagIC in Standard Mode For a description of operation in Legacy Mode see Section 7 6 1 Command Register The Command Register can be used either to initiate a sensor measurement or to read write to the Cycle Count Registers It consists of one byte Bit 7 is the Register Access Flag RFLAG and this controls whether a sensor measurement will be initiated or a read write to a register will be initiated The setting of bits 0 6 depends on how RFLAG is set 6 1 1 Initiate Sensor Measurement The Command Byte is defined as follows 7 6 5 4 3 2 1 0 RFLAG 0 0 0 CMPO ODIR MOT AS1 ASO CMPO Comparator Output When set HIGH this enables comparator output on the COMP pin ODIR Oscillator Direction Determines the magnetic oscillator direction if MOT is set HIGH If MOT is set LOW ODIR has no effect Used for debug only MOT Magnetic Oscillator Test When set HIGH causes the sensor oscillator selected by ASO and AG in the direction selected by ODIR to run continuously The COMP pin output is always enabled when MOT is HIGH When the MOT bit
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