Level Shifter Board User Manual v1.00
Contents
1. When powered on the board s green POWER LED will be lit The Target side the low voltage side can optionally be powered by the power already supplied to the Level Shifter Boardor by the target device If powering the Target side by the target device simply connect the device s power to the TPWR pin on the EXT TGT or either one of the TARGET boxed conneciors Figure 7 Li I2C SPI Level Shifter 12V 1 5V 108V 25V 30V LJV ce Ww po 4 lt Target Power Pins EXT TOT EXT 3 3v sc ONO Sci GNO SOA GND SOA GNO MSO GND LE t GNO SCK OND SCK GNO s59 GND 55 MO GND MOU GNO TPWR ONO 6 0V GNO 1 GND GNO ANALYZER TOTAL PHASE wee totalphase Com ie 2007 Teta Prase inc vt Figure 7 When powering the Target side of the Level Shifter Board power needs to be supplied to one of these Target power pins If powering the Target side by the power already supplied on the board then a jumper must be placed to enable this feature Figure 8 Refer to Section 4 for more details TOTAL PHASE Level Shifter Board User Manual Figure 8 When supplying power from the Level Shifter Board to the target a jumper needs to be place on TPWR When the Target side is properly powered the board s amber TARGET LED will be lit 3 5 Cross Connecting Aardvark Adapters and or Cheetah Adapiers When cross connecting two adapters the board must be powered on Otherwise results may be unpredictable If you exper2. Total Phase product be used in such an unauthorized manner Buyer agrees to indemnify and hold harmless Total Phase its officers employees affiliates and distributors from any and all claims arising from such use even if such claim alleges that Total Phase was negligent in the design or manufacture of its product 5 3 Contact Information Total Phase can be found on the Internet at http www totalphase com If you have support related questions please email the product engineers at support totalphase com For sales inquiries please contact sales totalphase com 13 TOTAL PHASE Level Shifter Board User Manual 2008 2010 Total Phase Inc All rights reserved 14
3. l C Level Shifting The I C level shifting circuit automatically handles the bi directionality of IC communication Simply select the correct logic level as described previously and correctly connect the SCL and SDA lines of the master and slave 4 3 SPI Level Shifting Unlike IC the SPI level shifting logic must be explicitly controlled for direction The four headers on the right side of the board determine the direction of traffic Selections are made by placing a jumper on one of the headers Their uses are described below Figure 10 The Level Shifter Board must be configured from the correct mode of operation when using this board to interface with an SPI or an MDIO bus e MASTER When selected will configure the Adapter Analyzer side of the board to behave as the SPI master Thus the SS SCK and MOSI lines will be shifted down to the Target side logic level The MISO line will be left in its default enabled state and will be shifted up to the Adapter Analyzer s logic level e SLAVE When selected will configure the Adapter Analyzer side of the board to behave as the SPI slave Thus the MISO line will be shifted down to the Target side logic level The SS SCK and MOSI line will be left in their default enabled state and will be shifted up to the Adapter Analyzer s logic level 11 TOTAL PHASE Level Shifter Board User Manual e MONITOR When selected will leave all SPI lines in their default enabled state and
4. DA MISO SCK 554 MOSI TPWwR 3 3V TARGET2 GKO GNO GNO GNO GND GNO GNO GNO EXT 3 3V SCL SDA miso SCH 534 MOSI 5 0V 33V TOTAL PHASE wwe ote pete com GP Jal be TH ee GND GND GND GND GND GND GND GND ADAPTER ANALYZER Figure 1 Schematic of the Flash Socket Board 1 1 Features e Level shifting for 1 C SPI MDIO and GPIO signals e On board regulator to specify and power downstream devices to 1 2 V 1 5 V 1 8 V 2 5 V 3 0 V and 3 3 V 1 2 What s Included The Level Shifter Board comes complete with e 1 Level Shifter Board e 1 6 0 inch 10 pin ribbon cable e 1 1 5 inch 10 pin ribbon cable TOTAL PHASE Level Shifter Board User Manual e 3 jumpers for configuration TOTAL PHASE Level Shifter Board User Manual 2 Hardware Specification 2 1 Power Consumption The power consumption of the Level Shifter Board depends on its configuration The board will draw approximately 6 mA from the Adapter Analyzer side when configured to power the target device and approximately 4 mA when the target is supplying its own power The current draw of the Level Shifter Board on the Target side is only applicable when the target device is supplying power to the board This current draw will be approximately 1 mA 2 2 Speed The Level Shifter Board is rated for IC communication at up to 800 kHz Maximum SPI and MDIO signaling rates are highly dependent on the specifi
5. Level Shifter Board Li I2C SPI Level Shifter TOTAL ee 1 2 1 5V 1 8V 2 5V 3 0V 3 3V P HAS B Supported products i Dax uat ADAPTER ia O Ls 4 mal p MONITOR Daan e EXT TGT EXT 3 3V SCL GND SCL GND SOA GNO SDA GND miso GND miso GND SCK GNO ScCx GND 554 GND 534 GND BAGE FROTEC TL AHAL Eee Onera TARGET2 ANALYZER MOSI GNO MOSI GNO TPA GNO 5 0V GND 3 3V GND 3 3V GND TOTAL PHASE wwe lotelprese com GE LAL be a AR Features Level Shifter Board e Level shifting of IC SPI and MDIO signals from 1 2 V to 3 3 V User Manual v1 00 C speeds of up to 800 kHz February 15 2010 e SPI and MDIO speeds of up to 20 MHz e Powering downstream devices e Multiple voltage options Summary The Level Shifter Board expands the utility of all of Total Phases I C SPI and MDIO products by allowing developers to communicate analyze and power downstream devices of lower logic levels TOTAL PHASE 1 Overview Level Shifter Board User Manual The Level Shifter Board provides embedded systems engineers with an easy and cost effective method for interfacing Total Phase s products with lower logic level devices The Level Shifter Board is capable of down shifting to all standard logic levels from 1 2 V to 3 3 V Engineers can also choose to power downstream devices 12C SPI Level Shifter TARGET TPR es Ww oO 4 aq p 1 2V 1 5V 1 8V 2 5V 3 0V 3 3V EXT TGT SCL S
6. Only a link to the Total Phase download area can be provided on such public websites Total Phase shall in no event be liable to any party for direct indirect special general incidental or consequential damages arising from the use of its site the software or documentation downloaded from its site or any derivative works thereof even if Total Phase or distributors have been advised of the possibility of such damage The software its documentation and any derivative works are provided on an as is basis and thus come with absolutely no warranty either express or implied This disclaimer includes but is not limited to implied warranties of merchantability fitness for any particular purpose and non infringement Total Phase and distributors have no obligation to provide maintenance support or updates Information in this document is subject to change without notice and should not be construed as a commitment by Total Phase While the information contained herein is believed to be accurate Total Phase assumes no responsibility for any errors and or omissions that may appear in this document 5 2 Life Support Equipment Policy Total Phase products are not authorized for use in life support devices or systems Life support devices or systems include but are not limited to surgical implants medical systems and other safety critical systems in which failure of a Total Phase product could Cause personal injury or loss of life Should a
7. c configuration of the level shifting board and the timing specification of the target device The Level Shifter Board has been tested to operate at up to 18 MHz when shifting to 1 2 V and up to 20 MHz when shifting to 3 3 V When operating at higher speeds shorter cables are recommended to help maintain signal integrity Please note that individual results will vary 2 3 l C Pull up Resistors The Adapter Analyzer side will always require pull up resistors for IC communication This is easily accomplished by using the built in pull up resistors of either an Aardvark 1 C SPI Host Adapter or Beagle l C SPI MDIO Protocol Analyzer Additionally any IC line that is being used as a digital input line GPIO to the Adapter Analyzer side must also include a pull up on the adapter side It is recommended that pull up resistors are always used on the Target side IC lines Users may find that they can still communicate properly without these pull ups however it is recommended that pull ups to the target s logic high still be used to ensure that the signal reaches its correct level 2 4 Leakage Voltage The Level Shifter Board is known to leak approximately 0 2 V to the Target side even when configured to not supply power to the target This is a very weak leakage which is only capable of sourcing approximately 20 uA of current TOTAL PHASE Level Shifter Board User Manual 3 Connectors 3 1 ADAPTER and ANALYZER There are two boxed conne
8. ctors on the right side Adapter Analyzer side of the Level Shifter Board Figure 2 which are used to connect the board to an Aardvark I C SPI Host Adapter Cheetah SPI Host Adapter and or Beagle IC SPI MDIO Protocol Analyzer These two connectors are cross connected so it does not matter which one is used In most cases you will only want to connect a single adapter at a time to the Level Shifter Board ADAPTER ed uy N gt _ aq z lt Figure 2 Two boxed connectors for connecting an adapter and or analyzer to the Level Shifter Board The second connector may be used to connect a second host adapter Examples of these situations are in order to have more slaves or to create a multi master situation Alternatively the second connector can be used to connect a protocol analyzer For example an Aardvark adapter or a Cheetah adapter can be connected to the board through the ADAPTER connector to program a low voltage memory chip At the same time a Beagle I C SPI MDIO Protocol Analyzer can be attached to the ANALYZER connector to monitor the bus while the chip is being programmed to ensure that the data on the bus is correct The pinout of the two connectors is described in Figure 3 TOTAL PHASE 1 SCL 3 SDA 5 MISO 7 SCLK MDC 9 SS 1 SCL 3 SDA 5 MISO 7 SCLK MDC 9 SS i 7 77 n ADAPTER r ie L iu m Inn WW Lu lu T in 0000 Lu Lu be et ANALYZER Level Shi
9. fter Board User Manual 2 GND 4 NC 5V 6 NC 5V 8 MOSI MDIO 10 GND 2 GND 4 NC 5V 6 NC 5V 8 MOSI MDIO 10 GND Figure 3 The pinout for the two boxed connectors on the Adapter Analyzer side of the Level Shifter Board 3 2 TARGET1 and TARGET2 There are two boxed connectors on the left side Target side of the Level Shifter Board Figure 4 which are used to connect the target bus to the level shifter The signal lines on these connectors are operating at the voltage levels specified by the user This level can either be specified on the board through the use of the jumper connectors or can be determined by the downstream system These two connectors are cross connected so it does not matter which one is used S 688888 TARGET1 cy Pa H Figure 4 Two boxed connectors for connecting the Level Shifter Board to one or more target buses TOTAL PHASE Level Shifter Board User Manual These two boxed connectors have an almost identical pinout to the ADAPTER and ANALYZER connector The only difference is that the 5 0 V pins will have the target s voltage level instead The pinout of the two connectors is described in Figure 5 Pl 1 SCL g 2 GND 3 SDA j Fa GH 4 TPWR 5 MISO A oo 6 TPWR 7 SCLK MDC To 8 MOSI MDIO 9 SS po 10 GND 1 SCL N Te of 2 GND a ene 3 tow 7 SCLK MDC a oor 8 MOSI MDIO 9 SS Faille 10 GND E Figure 5 The pi
10. ience problems please make sure that the POWER LED on the board is lit TOTAL PHASE Level Shifter Board User Manual 4 Configuring the Level Shifter 4 1 Selecting Shifting Level There are two options for selecting the Target side logic level The first method is to use the power supplied to the Level Shifter Board to power the target device In this method the output voltage must be enabled by placing a jumper on the TPWR pins Then a second jumper is used on one of the voltage selection pins illustrated in Figure 9 The pins are clearly labeled with the output voltage that they will set If no jumper is set on these pins then it will default to 1 2 V re 1 2V 1 5V 1 8V 2 5V 3 0V 3 3V Figure 9 A jumper must be placed on the appropriately labeled header for the desired voltage level If supplying power from the Level Shifter Board to the target a jumper needs to be place on TPWR as well The second method is to match the power supplied to the Target side when using a self powered device board When using this option the logic levels will be set to match the voltage levels applied to TPWR as shown in Figure 7 In this configuration the TPWR jumper must be removed Simply connect the power and ground of the target device to the power and ground of the Level Shifter Board Target side In order to function properly the target s voltage level should not exceed 3 3 V 10 TOTAL PHASE Level Shifter Board User Manual 4 2
11. nout for the two boxed connectors on the Target side of the Level Shifter Board 3 3 EXT 3 3V and EXT TGT All the bus and power signals on the board are also available through two 16 pin headers on the board Figure 6 The EXT 3 3 V connector provides the bus signals at the standard signaling levels employed by Total Phases IC SPI and MDIO products The EXT TGT connector provides the bus and power signals of the downstream device and will be at the voltage level defined by the user All connections are labeled for the user s convenience EXT TGT EXT 3 3V SCL GND GND SDA GND GND MISO GND GND GND GND GND GND GND GND GND GND GND GND Figure 6 The External Connectors provide the developer with a quick and easy way to interface or monitor any or all of the Level Shifter Board signals on either the Adapter Analyzer side or the target side TOTAL PHASE Level Shifter Board User Manual 3 4 Powering the Level Shifter Board In order to function properly both sides of the board must be powered The Adapter Analyzer side the high voltage side must be powered with 5 V This can easily be accomplished by using the target power feature of Total Phases 1 C SPI or MDIO products when it is connected to the Adapter Analyzer side of the board Target power can be enabled via the Rosetta Language Bindings the Flash Center software the Aardvark Control Center Software the Beagle Data Center software or the Cheetah GUI Software
12. ups the master driven lines SS SCK MOSI and the slave driven line MISO The direction of each of these groups can be controlled independently but all signals within a group will be in the same direction Placing a jumper on the MASTER header will enable the master driven lines to down shift and the slave driven line to up shift Placing a jumper on the SLAVE header will enable the slave driven line to down shift and the master driven lines to up shift Placing a jumper on the MONITOR header will enable all lines to up shift If there is ever a time when a line is configured to be both up shifting and down shifting the down shift will take precedence Thus if you want to use all the SPI lines as digital outputs from the host adapter simply place jumpers on both the MASTER and SLAVE headers The lClines do not require any directional configuration as it is a bi directional bus Each C line may go in a different direction and can also be swapped on the fly 12 TOTAL PHASE Level Shifter Board User Manual 5 Legal Contact 5 1 Disclaimer All of the software and documentation provided in this datasheet is copyright Total Phase Inc Total Phase License is granted to the user to freely use and distribute the software and documentation in complete and unaltered form provided that the purpose is to use or evaluate Total Phase products Distribution rights do not include public posting or mirroring on Internet websites
13. will therefore be shifted up to the Adapter Analyzer side logic level This option is used in situations where only a Beagle I C SPI MDIO analyzer is plugged into the board and no SPI adapter is being used e DISABLE When selected will disable all Target side SPI outputs and set them to a high impedance state If no connection is set the board will default to this state However if any of the previous configuration is set it will take precedence on this one It is important to note that for most all cases only one of these connections should be set at a time Using more than one may cause incorrect SPI operation The only situation in which more than one jumper may be used is if the SPI lines are being used for GPIO 4 4 MDIO Level Shifting The MDIO signal lines are shared with SPI It is therefore not possible to bidirectionally shift MDIO signals as the SPI level shifting does not have the infrastructure for this However MDIO monitoring of lower logic levels is still possible Simply place the SPI control jumper on MONITOR and set the Beagle I C SPI MDIO analyzer to monitor MDIO 4 5 GPIO Level Shifting GPIO signals may fall on either I C lines or SPI lines and each of these situations must be handled separately When the GPIO lines coincide with the SPI lines special care must be taken to ensure that the SPI level shifting circuit is configured to the correct direction The SPI lines are logically broken up into two separate gro
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