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1 XR21V1414 EVALUATION BOARD USER`S MANUAL - Digi-Key

1. 9 male connector for channel 182 009 113R161 RS 232 mode 9 male connector for channel 182 009 113R161 RS 232 mode 9 male connector for channel ED555 4DS RS 485 mode 4X1 terminal block for channel A ED555 4DS RS 485 mode 4X1 terminal block for channel B ED555 4DS RS 485 mode 4X1 terminal block for channel C ED555 4DS RS 485 mode 4X1 terminal block for channel D 5 1 An external pull up is required on the LOWPOWER pin for proper functionality The external pull up is not shown in the evaluation board schematics but has been added on the evaluation board 2 An external pull up is required on any GPIO pins that is used as an input In the suspend mode the internal pull up resistor is disabled and the input will be floating if there is no external pull up resistor The external pull ups have not been added to the GPIOs used as inputs on this evaluation board Powering Connectivity XR21V1414 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 2 Jumper Settings 2 2 1 Common jumpers Common jumpers are those jumpers which should be set the same for both RS 232 and RS 485 mode The Table 2 shows the common jumpers setting on the evaluation board JUMPERS LOCATION TABLE 2 COMMON JUMPERS SETTINGS FUNCTIONS Power source select COMMENTS Not installed Trace between 2 amp 3 Jumper in 1 amp 2 selects power from external power supply of 5V Jumper
2. Powering Connectivity REV 1 0 0 XR21V1414 EVALUATION BOARD USER S MANUAL 1 0 INTRODUCTION This user s manual is for the XR21V1414 evaluation board It will describe the hardware setup required to operate the part 2 0 OVERVIEW The XR21V1414 evaluation board has one 48 TQFP package on it Figure 1 shows a top view of XR21V1414 evaluation board layout FIGURE 1 VIEW OF XR21V1414 EVALUATION BOARD LAYOUT 8 Fe J i 5 CH a 24 JP23 16 9 lt 0 TCONS J 5_ CH A UART Ti pol RX J2 UART1 RX 55 P26 8 25 gt CONIO 261 6 le iw lt v N 1 UARTZ 02572 2 0 2 5 2 1 CH D 27 CONS 0 0 Oo v gt GND HO 99 900 6 NN TPL Powering Connectivity XR21V1414 EVALUATION BOARD USER S MANUAL REV 1 0 0 Figure 2 shows a bottom view of XR21V1414 evaluation board layout FIGURE 2 BOTTOM VIEW OF XR21V1414 EVALUATION BOARD LAYOUT 2 9 0 C 29 R54 ass oon Es oon at 0 v gt 00099 00 0
3. gt 00 R36 RIS ag ey oon Powering Connectivity XR21V1414 EVALUATION BOARD USER S MANUAL REV 1 0 0 2 1 Evaluation Board Components Table 1 below lists some of the components installed on the evaluation boards The default setting is RS 232 mode TABLE 1 COMPONENTS OF THE XR21V1414 EVALUATION BOARD LOCATION Top XRP6657IHBTR F DFN6 FUNCTION Exar s voltage converter to step down voltage from 5V to 3 3V Top AT24C02B PU DIP8 12 EEPROM Top XR21V1414IM48 Exar s 4 channel USB UART Bottom NC7SZ14M5xX SOT 23 5 Invert LowPower Suspend signal Bottom SN74LVC2G53DCTR SM8 Switch UART TXA signal into either RS 232 or RS 485 transceiver Bottom SN74LVC2G53DCTR SM8 Switch UART TXB signal into either RS 232 or RS 485 transceiver Bottom SN74LVC2G53DCTR SM8 Switch RXA signal from either RS 232 or RS 485 trans ceiver Bottom SN74LVC2G53DCTR SM8 Switch RXB signal from either RS 232 or RS 485 trans ceiver Bottom SN74LVC2G53DCTR SM8 Switch UART TXC signal into either RS 232 or RS 485 transceiver Bottom SN74LVC2G53DCTR SM8 Switch UART TXD signal into either RS 232 or RS 485 transceiver Bottom SN74LVC2G53DCTR SM8 Switch RXC signal from either RS 232 or RS 485 trans ceiver Bottom SN74LVC2G53DCTR SM8 Switch RXD s
4. in 2 amp 3 selects power from USB Vgus power SCL pull up pull down resistor select Jumper in 1 amp 2 selects pull up for SCL Jumper in 2 amp 3 selects pull down for SCL SDA pull up pull down resistor select Jumper in 1 amp 2 selects pull up for SDA Jumper in 2 amp 3 selects pull down for SDA 12 EEPROM header Jumper in 1 amp 2 connects SCL to 122 EEPROM Jumper in 3 amp 4 connects SDA to I2C EEPROM 12C EEPROM has not been programmed Selects RS 232 or RS 485 mode for Channel A Jumper in 1 amp 2 selects RS 485 mode Jumper in 2 amp 3 selects RS 232 mode default Selects RS 232 or RS 485 mode for Channel B Jumper in 1 amp 2 selects RS 485 mode Jumper in 2 amp 3 selects RS 232 mode default Selects RS 232 or RS 485 mode for Channel C Selects RS 232 or RS 485 mode for Channel D Jumper in 1 amp 2 selects RS 485 mode Jumper in 2 amp 3 selects RS 232 mode default Jumper in 1 amp 2 selects RS 485 mode Jumper in 2 amp 3 selects RS 232 mode default Power supply for XR21V1414 Not installed Trace between pin 1 amp 2 UART side Channel A external loop back header Jumper in enables external loopback for channel A in the UART side Note External loopback via this jumper can only be performed when the transceiver has been disabled UART side Channel B external loop back header Jumper in enables external loopback for channel B in the UART side Note Externa
5. or full Jumper in 1 amp 2 selects for half duplex mode duplex mode 3 0 DRIVERS AND SUPPORT For any questions about this evaluation board software uarttechsupport exar com Jumper in 2 amp 3 selects for full duplex mode drivers or technical support send an e mail to Powering Connectivity REV 1 0 0 XR21V1414 EVALUATION BOARD USER S MANUAL 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 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 minimize
6. d b the user assumes all such risks c potential liability of EXAR Corporation is adequately protected under the circumstances Copyright 2009 EXAR Corporation Datasheet July 2009 Send your UART technical inquiry with technical details to hotline uarttechsupport exar com Reproduction in part or whole without the prior written consent of EXAR Corporation is prohibited
7. ignal from either RS 232 or RS 485 trans ceiver Top SP3245EEY L TSSOP 28 Exar s RS 232 transceiver for channel A Top SP3245EEY L TSSOP 28 Exar s RS 232 transceiver for channel B Top SP3245EEY L TSSOP 28 Exar s RS 232 transceiver for channel C Top SP3245EEY L TSSOP 28 Exar s RS 232 transceiver for channel D SN74LVC2G66DCT SM8 Mutiplexer to select RS 485 direction control signal RTSA or DTRA SP3497EEN L NSOIC14 Exar s RS 485 transceiver for channel A SN74LVC2G66DCT SM8 Mutiplexer to select RS 485 direction control signal RTSB or DTRB SP3497EEN L NSOIC14 Exar s RS 485 transceiver for channel B SN74LVC2G66DCT SM8 Mutiplexer to select RS 485 direction control signal RTSC or DTRC SP3497EEN L NSOIC14 Exar s RS 485 transceiver for channel C SN74LVC2G66DCT SM8 Mutiplexer to select RS 485 direction control signal RTSD or DTRD Powering Connectivity XR21V1414 EVALUATION BOARD USER S MANUAL REV 1 0 0 TABLE 1 COMPONENTS OF THE XR21V1414 EVALUATION BOARD LOCATION FUNCTION SP3497EEN L NSOIC14 Exar s RS 485 transceiver for channel D PJ 002A External power input 690 004 621 023 USB B Type connector Communication with USB host USBD USBD and power source for evaluation board VBus 182 009 113R161 RS 232 mode 9 male connector for channel A 182 009 113R161 RS 232 mode
8. l loopback via this jumper can only be performed when the transceiver has been disabled XR21V1414 EVALUATION BOARD USER S MANUAL TABLE 2 COMMON JUMPERS SETTINGS JUMPERS LOCATION FUNCTIONS UART side Channel C external loop back header Powering Connectivity REV 1 0 0 COMMENTS Jumper in enables external loopback for channel C in the UART side Note External loopback via this jumper can only be performed when the transceiver has been disabled UART side Channel D external loop back header 2 2 2 Remote wakeup and jumper Jumper in enables external loopback for channel D in the UART side Note External loopback via this jumper can only be performed when the transceiver has been disabled The SDA and SCL are used to specify whether Remote Wakeup and or Bus Powered configurations are to be supported These pins are sampled at power up The following Table 3 describes how Remote Wakeup and Bus Powered support TABLE 3 REMOTE WAKEUP AND POWER MODES REMOTE WAKE UP SUPPORT Self P POWER MODE COMMENTS owered Default if no EEPROM is present Bus P owered Self P owered Bus P owered The following Table 4 shows jumpers related to remote wakeup TABLE 4 REMOTE WAKEUP JUMPERS SETTINGS JUMPERS LOCATION FUNCTIONS COMMENTS JP38 Top Select remote control wakeup signal for Jumper in 1 amp 2 selects UART RS 232 transceiver RI Cha
9. nnel A signal Jumper in 2 amp 3 selects push button Sw1 Top Generate remote wakeup signal Push once to generate one remote wakeup signal REV 1 0 0 2 2 3 Powering Connectivity XR21V1414 EVALUATION BOARD USER S MANUAL RS 232 mode jumpers Default setting is RS 232 mode The XR21V1414 evaluation board is set in RS 232 mode by default The following Table 5 jumper settings apply to the RS 232 mode JUMPERS LOCATION TABLE 5 JUMPER SETTINGS FOR RS 232 MODE FUNCTIONS Power supply for RS 232 transceiver of Channel A COMMENTS Not installed Trace between pin 1 amp 2 Power supply for RS 232 transceiver of Channel B Not installed Trace between pin 1 amp 2 Power supply for RS 232 transceiver of Channel C Not installed Trace between pin 1 amp 2 2 2 4 Power supply for RS 232 transceiver of Channel D RS 485 mode jumpers Not installed Trace between pin 1 amp 2 The following Table 6 jumper setting applies to the RS 485 mode JUMPERS LOCATION TABLE 6 JUMPER SETTINGS FOR RS 485 MODE FUNCTIONS COMMENTS JP34 Top Power supply RS 485 transceiver of Not installed Trace between pin 1 amp 2 Channel A JP9 Top Select Channel ARTS direction Jumper in 1 amp 2 selects RTS based direction control for control for TX TX Jumper in 2 amp 3 selects DTR based direction control for TX JP10 Top Select Channel A direction control fo
10. r RX Jumper in 1 amp 2 selects common direction control for and TX or always for RX RX and TX Jumper in 2 amp 3 enables RX always JP11 Top Channel select for half duplex or full Jumper in 1 amp 2 selects for half duplex mode duplex mode Jumper in 2 amp 3 selects for full duplex mode JP12 Top Channel select for half duplex or full Jumper in 1 amp 2 selects for half duplex mode duplex mode Jumper in 2 amp 3 selects for full duplex mode JP35 Top Power supply for RS 485 transceiver of Not installed Trace between pin 1 amp 2 Channel B JP13 Top Select Channel RTS DTR direction Jumper in 1 amp 2 selects RTS based direction control for control for TX TX Jumper in 2 amp 3 selects DTR based direction control for TX JP14 Top Select Channel B direction control for RX Jumper in 1 amp 2 selects common direction control for and TX or always for RX RX and TX Jumper in 2 amp 3 selects common direction control for RX always JP15 Top Channel B select for half duplex or full Jumper in 1 amp 2 selects for half duplex mode duplex mode Jumper in 2 amp 3 selects for full duplex mode XR21V1414 EVALUATION BOARD USER S MANUAL TABLE 6 JUMPER SETTINGS FOR RS 485 MODE JUMPERS LOCATION FUNCTIONS Channel B select for half duplex or full duplex mode Powering Connectivity REV 1 0 0 COMMENTS Jumper in 1 amp 2 selects for half duplex mode Jumper in 2 amp 3 selects for full duplex mode Power supply for RS 485 transceive
11. r of Channel C Not installed Trace between pin 1 amp 2 Select Channel C RTS or DTR direction control for TX Jumper in 1 amp 2 selects RTS based direction control for TX Jumper in 2 amp 3 selects DTR based direction control for TX Select Channel C direction control for RX and TX or always for RX Jumper in 1 amp 2 selects common direction control for RX and TX Jumper in 2 amp 3 selects common direction control for RX always Channel C select for half duplex or full duplex mode Jumper in 1 amp 2 selects for half duplex mode Jumper in 2 amp 3 selects for full duplex mode JP20 Top Channel C select for half duplex or full Jumper in 1 amp 2 selects for half duplex mode duplex mode Jumper in 2 amp 3 selects for full duplex mode JP37 Top Power supply for RS 485 transceiver of Not installed Trace between pin 1 amp 2 Channel D JP21 Top Select Channel D RTS or direction Jumper in 1 amp 2 selects RTS based direction control for control for TX TX Jumper in 2 amp 3 selects DTR based direction control for TX JP22 Top Select Channel D direction control for RX Jumper in 1 amp 2 selects common direction control for and TX or always for RX RX and TX Jumper in 2 amp 3 selects common direction control for RX always JP23 Top Channel D select for half duplex or full Jumper in 1 amp 2 selects for half duplex mode duplex mode Jumper in 2 amp 3 selects for full duplex mode JP24 Top Channel D select for half duplex

1 XR21V1414 EVALUATION BOARD USER`S MANUAL - Digi-Key

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