SP339EER1-0A-EB - Exar Corporation
Contents
1. however is assumed for inaccuracies EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness Products are not authorized for use in such applications unless EXAR Corporation receives in writing assurances to its satisfaction that a the risk of injury or damage has been minimized b the user assumes all such risks c potential liability of EXAR Corporation is adequately protected under the circumstances Copyright 2013 EXAR Corporation Datasheet August 2013 For technical support please email Exar s Serial Technical Support group at serialtechsupport exar com Reproduction in part or whole without the prior written consent of EXAR Corporation is prohibited 122. USB port can be used 3 1 External Power Supply An external 3 3V or 5V power supply can be applied at TP2 The USB cable should not be plugged into a USB port and J17 should not be installed Of course there should be a common ground between the external power supply and the SP338 339 3 2 USB Powered If using power from a USB port select the supply voltage at J4 A jumper across J4 pins 1 amp 2 selects the 5V from the USB connector A jumper across J4 pins 2 amp 3 selects the regulated 3 3V output from the SP6260 A jumper across J17 pins 1 amp 2 will also need to be installed for power to be supplied to the SP338 339 A jumper should also be installed across J2 pins 1 amp 2 or 3 amp 4 to ensure that there s a common ground between the USB supplied voltage and the SP338 339 4 0 EVALUATING THE SP338 SP339 WITH THE XR21B1411 The XR21B1411 can be used to pass data through the SP338 SP339 An external power supply can be used or can be powered directly from the USB bus as described above A jumper should also be installed across J2 pins 1 amp 2 or 3 amp 4 to ensure that there s a common ground between the XR21B1411 and SP338 339 To enable the connection between the XR21B1411 and the SP338 339 place the switches at SW3 to the ON position In addition if the DB9 connector is used place the switches at SW4 in the ON position Windows Linux and Mac drivers for the XR21B1411 can be downloaded from Exar s website For Wi
3. pin can be controlled from the XR21B1411 using the DTR output pin To enable the connection between the DTR pin of the XR21B1411 and the DIR2 pin install a jumper across J21 pins 1 amp 2 There s no automatic direction control feature with the DTR pin However the DTR pin can be controlled manually from the software The DTR can use the standard set DTR and clear DTR APIs in Windows or Linux to set clear the DTR pin The DTR pin can also be set cleared by writing directly to the GPIO_SET and GPIO_CLEAR registers using the sample USB UART test GUI from Exar s website A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 5 0 DRIVERS AND SUPPORT For any questions about this evaluation board software drivers or technical support send an e mail to uarttechsupport exar com or serialtechsupport exar com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design performance or reliability EXAR Corporation assumes no responsibility for the use of any circuits described herein conveys no license under any patent or other right and makes no representation that the circuits are free of patent infringement Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user s specific application While the information in this publication has been carefully checked no responsibility
4. the evaluation board when shipped from the factory FIGURE 3 RS 232 MODE TP20 TP41 TP22 TP42 TP24 TP43 TP26 TPS TP28 TP52 TP30 TP53 TP32 TP54 TP34 TP55 0 Mode1 Enable 1 C EXAR A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 1 3 Half Duplex RS 485 Mode 1 Figure 4 below shows the SP338 SP339 configured in the half duplex RS 485 mode 1 m J23 Pins 7 amp 8 MODE O 0 m J23 Pins 9 amp 10 MODE 1 1 jumper installed between these pins m J23 Pins 11 amp 12 MODE2 0 The RS 485 signals are also accessible at J16 FIGURE 4 HALF DUPLEX RS 485 Mope 1 TP22 TP42 All pull downs 330kO Modei 1 Enable 1 A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 2 1 4 Full Duplex RS 485 422 Mode 1 Figure 5 below shows the SP338 SP339 configured in the full duplex RS 485 422 mode 1 m J23 Pins 7 amp 8 MODEO 1 jumper installed between these pins m J23 Pins 9 amp 10 MODE1 1 jumper installed between these pins m J23 Pins 11 amp 12 MODE2 0 The RS 485 signals are also accessible at J16 FIGURE 5 FULL DUPLEX RS 485 MODE 1 TP20 TP41 TP22 TP42 TP24 TP43 TP26 TPS All pull downs 330kO Mode0 1 Mode1 1 A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 1 5 Full Du
5. 3 2 Half Duplex Mode In the half duplex modes this pin controls the direction of the T2 different driver or R1 differential receiver A logic low enables the R2 differential receiver and disables the T2 differential driver A logic high enables the T2 differential driver and disablesthe R2 differential receiver 2 2 4 TERM This pin is only applicable in the half duplex and full duplex RS 485 RS 422 modes The TERM pin enables disables the internal termination resistor There is an in internal pull down resistor on this pin so the internal termination resistor is disabled when there s no jumper across J23 pins 13 amp 14 Install a jumper across J23 pins 13 amp 14 to enable the internal termination resistor 2 2 5 INVDIR This pin is only applicable int he half duplex and full duplex RS 485 RS 422 modes The INVDIR inverts the polarity of the DIR1 and DIR2 pins This pin has an internal pull down resistor The polarity inversion can be enabled by installing a jumper across J23 pins 15 amp 16 2 2 6 ENABLE This pin enables disables the SP338 339 This pin has an internal pull down When shipped from the factory there will be a jumper installed across J23 pins 17 amp 18 to enable the SP338 339 10 Gar A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 3 0 EVALUATING THE SP338 SP339 TRANSCEIVER ONLY When evaluating just the SP338 SP339 an external power supply can be used or power from a
6. A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 1 0 INTRODUCTION This users manual is for the SP338 SP339 evaluation board The SP338 and SP339 are pin comaptible devices and are both offered in the 40 pin QFN package The primary difference is that the SP339 only has 4 modes of operation 2 mode control pins while the SP338 has 8 modes of operation 3 mode control pins Table 1 shows the different devices and packages that this evaluation board supports and the corresponding ordering part numbers for each TABLE 1 PACKAGE LIST DEVICE EVALUATION BOARD DEVICE DEVICE ORDERING PART NUMBER ORDERING PART NUMBER PACKAGE LOCATION SP338EER1 L SP338EER1 0A EB 40 pin QFN U3 SP339EER1 L SP339EER1 0A EB 40 pin QFN U3 2 0 EVALUATION BOARD OVERVIEW A block diagram of the evaluation board is shown in Figure 1 below FIGURE 1 EVALUATION BOARD BLOCK DIAGRAM USB DB9 Connector XR21B1411 Connector In addition to the SP338 SP339 there is an Exar XR21B1411 1 ch USB UART on this evaluation board When shipped from the factory the SW3 and SW4 switches are off Therefore the SP338 SP339 is isolated from both the XR21B1411 and the DB9 connector To enable the connections between the XR21B1411 and the SP338 SP339 place all switches on SW3 in the ON position To enable the connections between the SP338 SP339 and the DB9 connector place all switches on SW4 to the ON po
7. ndows a sample USB UART test GUI is also available for download 4 1 Loopback Mode or RS 232 Mode The XR21B1411 can transmit and receive data through the SP338 339 if the switches at SW3 and SW4 are in the ON position For RS 232 mode an external null modem cable or connection is required to transmit and receive data 4 2 Half duplex Full Duplex and Mixed Duplex RS 485 422 modes Some additional jumpers are required if there is a requirement to control the DIR1 and or DIR2 pins from the software driver or application There should not be any jumpers installed on J23 pins 3 amp 4 and pins 5 amp 6 4 2 1 Controlling DIR1 pin using RTS output pin of XR21B1411 The DIR1 pin can be controlled from the XR21B1411 using the RTS output pin To enable the connection between the RTS pin of the XR21B1411 and the DIR1 pin install a jumper across J20 pins 1 amp 2 If using the Windows 2000 XP Vista 7 8 driver from Exar s website the RS 485 mode can be enabled from the properties page and will be enabled if used with any standard terminal application Alternatively the RS 485 mode can be enabled using the sample USB UART test GUI from Exar s website When transmitting data the RTS pin will be high While not transmitting data receiving or idle the RTS pin will be low This feature will work for both the half duplex RS 485 modes and full duplex RS 485 422 modes 4 2 2 Controlling DIR2 pin using DTR output pin of XR21B1411 The DIR2
8. nfigured in the half duplex RS 485 422 mode 2 m J23 Pins 7 amp 8 MODEO 0 m J23 Pins 9 amp 10 MODE1 1 jumper installed between these pins m J23 Pins 11 amp 12 MODE2 1 jumper installed between these pins The RS 485 signals are also accessible at J16 FIGURE 8 HALF DUPLEX RS 485 Mope 2 c2 TP20 TP41 C4 Cc 0 1uF 1 0uF TP22 TP42 TPE L2 TP8 L3 TP26 TP51 All pull downs 330kO 0 InvDir Vcc Mode2 1 Enable 1 1 D o ae 5 0 0 T A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 2 1 8 RS 485 422 Mixed Duplex Mode SP338 Only Figure 9 below shows the SP338 configured in the full duplex RS 485 422 mode m J23 Pins 7 amp 8 MODEO 1 jumper installed between these pins m J23 Pins 9 amp 10 MODE1 1 jumper installed between these pins m J23 Pins 11 amp 12 MODE2 1 jumper installed between these pins The RS 485 signals are also accessible at J16 FIGURE 9 RS 485 422 MixED DUPLEX MODE TP20 TP41 TP22 TP42 Tre TP8 TP24 TP43 TP26 TP51 TP12 TP14 TP28 TP52 TPi6 TP30 TP53 Trig O TP32 TP54 All pull downs 330kO TP34 TP55 21 InvDir Vcc Mode0 1 Modei 1 Mode2 1 Enable 1 C EXAR A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 2 Additional C
9. ontrol Signals 2 2 1 SLEW By default slew rate limiting is disabled To enable slew rate limiting place a jumper between J23 pins 1 amp 2 2 2 2 DIR1 This pin is only applicable in the half duplex and full duplex RS 485 RS 422 modes The DIR1 signal can manually be controlled at J23 pins 3 amp 4 There s an internal pull down resistor on this pin To change the logic level on this pin install a jumper at J23 pins 3 amp 4 2 2 2 1 Full Duplex Mode In the full duplex modes this pin enables disables the T1 differential driver A logic low disables the T1 differential driver A logic high enables the T1 differential driver 2 2 2 2 Half Duplex Mode In the half duplex modes this pin controls the direction of the T1 different driver or R1 differential receiver A logic low enables the R1 differential receiver and disables the T1 differential driver A logic high enables the T1 differential driver and disablesthe R1 differential receiver 2 2 3 DIR2 This pin is only applicable in the half duplex and full duplex RS 485 RS 422 modes The DIR2 signal can manually be controlled at J23 pins 5 amp 6 There is an internal pull down resistor on this pin To change the logic level on this pin install a jumper at J23 pins 5 amp 6 2 2 3 1 Full Duplex Mode In the full duplex modes this pin enables disables the T2 differential driver A logic low disables the T2 differential driver A logic high enables the T2 differential driver 2 2
10. plex RS 485 422 Mode 2 SP338 only Figure 6 below shows the SP338 configured in the full duplex RS 485 422 mode 2 m J23 Pins 7 amp 8 MODEO 0 m J23 Pins 9 amp 10 MODE 0 m J23 Pins 11 amp 12 MODE2 1 jumper installed between these pins The RS 485 signals are also accessible at J16 FIGURE 6 FULL DUPLEX RS 485 MODE 2 TP20 TP41 TP22 TP42 TP24 TP43 TP26 TP51 TP28 TP52 TP30 TP53 TP32 TP54 TP34 TP55 0 Mode1 A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 2 1 6 Full Duplex RS 485 422 Mode 3 SP338 Only Figure 7 below shows the SP338 configured in the full duplex RS 485 422 mode 3 m J23 Pins 7 amp 8 MODEO 1 jumper installed between these pins m J23 Pins 9 amp 10 MODE 1 0 jumper installed between these pins m J23 Pins 11 amp 12 MODE2 1 jumper installed between these pins The RS 485 signals are also accessible at J16 FIGURE 7 FULL DUPLEX RS 485 MODE 3 c2 m TP20 TP41 y TPE L2 TP8 L3 TP26 TP51 TP30 IPSs Vcc All pull downs 330kO TT 1i nN D o D ne 5 ne 0 0 0 P34 TP55 0 InvDir Vcc Enable 1 EXAR A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 1 7 Half Duplex RS 485 Mode 2 SP338 Only Figure 8 below shows the SP338 SP339 co
11. sition All SP338 SP339 signals are accessible from the test points on the board The test points are shown in each figure showing the modes 2 1 Mode Selection The modes of the SP338 are selected using the following pins at J23 m Pins 7 amp 8 labeled MODEO on the board m Pins 9 amp 10 labeled MODE1 on the board m Pins 11 amp 12 labeled MODE2 on the board Note that the SP339 does not have a MODE2 pin so the SP339 modes are only controlled via the MODE1 and MODEO pins The SP338 SP339 have internal pull down resistors on these pins So the corresponding MODE pins will be 0 unless a jumper is installed on the J23 pins listed above to change the MODE bit to 1 C EXAR A New Direction in Mixed Signal SP338 SP339 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 1 1 Loopback Mode Figure 2 below shows the SP338 SP339 configured in the Loopback mode m J23 Pins 7 amp 8 MODEO 0 m J23 Pins 9 amp 10 MODE1 0 J23 Pins 11 amp 12 MODE2 0 This mode can be used for diagnostic purposes FIGURE 2 LOOPBACK MODE oO Mode1 A New Direction in Mixed Signal REV 1 0 0 SP338 SP339 EVALUATION BOARD USER S MANUAL 2 1 2 RS 232 Mode Figure 3 below shows the SP338 SP339 configured in the RS 232 mode m J23 Pins 7 amp 8 MODEO 1 jumper installed between these pins m J23 Pins 9 amp 10 MODE 0 m J23 Pins 11 amp 12 MODE2 0 This is the default setting on
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