Texas Instruments AM438x ePOS EVM, User Manual, Page: 17 / 25

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Board Connectors
17 SPRUIF8 – June 2017
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AM438x ePOS EVM Hardware
8.8.2 RS-232 Connector 2 – J20
Table 15 lists the pin details of RS-232 connector 2.
Table 15. RS-232 Connector 2 Pin Details
Pin No. Signal Name Description
1 RS232_1_DCD Data carrier detect
2 RS232_1_RXD Receive
3 RS232_1_TXD Transmit
4 RS232_1_DTR Data terminal ready
5 GND Ground
6 RS232_1_DSR Data set ready
7 RS232_1_RTS Request to send
8 RS232_1_CTS Clear to send
9 RS232_1_RI Ring indicator
8.9 Smart Card Connector – J27
Table 16 lists the pin details of the smart card connector.
Table 16. Smart Card Connector Pin Details
Pin Name Signal Name Description
Sensor1 SMRTCRD1_PRES Smart card present
Sensor2 V3_3D Voltage 3.3 V
T1 VCC_SC1 Voltage
T2 SMRTCRD1_RST Reset
T3 SMRTCRD1_CLK Clock
T4 SMRTCRD1_C4 Auxillary I/O
T5 GND Ground
T6 VCC_SC1 Voltage
T7 SMRTCRD1_IO I/O
T8 SMRTCRD1_C8 Auxillary I/O
8.10 SAM Card Connector – J28, J29, and J58
Three SAM card connectors are used in this ePOS EVM design. Table 17 lists the pinout details of the
SAM card connector.
Table 17. SAM Card Connector Pin Details
Pin Name Signal Name Description
C1 VCC_SC2 Voltage
C2 SAMCRD_RST Smart card reset
C3 SAMCRD_CLK Smart card clock
C5 GND Ground
C6 VCC_SC2 Voltage
C7 SAMCRD_IO I/O
SW1 NC NC
SW2 NC NC