RealView Platform Baseboard for Cortex-A8 User Guide: A.6. UART interface

A.6. UART interface

The PB-A8 provides four serial transceivers on the rear panel of the enclosure. See Figure 3.3 for the location of the connectors.

Figure A.7 shows the pin numbering for the 9-pin D-type male connector used on the PB-A8.

Figure A.7. Serial interface connector

Table A.4 shows the signal assignment for the connectors.

Table A.4. Serial interface signal assignment

Pin	UART0 J24A (top)	UART1 J24B (bottom)	UART2 J25A (top)	UART3 J25B (bottom)
1	SER0_DCD	NC	NC	NC
2	SER0_RX	SER1_RX	SER2_RX	SER3_RX
3	SER0_TX	SER1_TX	SER2_TX	SER3_TX
4	SER0_DTR	SER1_DTR^[a]	SER2_DTR^a	SER3_DTR^a
5	SER0_GND	SER1_GND	SER2_GND	SER3_GND
6	SER0_DSR	SER1_DSR	SER2_DSR	SER3_DSR
7	SER0_RTS	SER1_RTS	SER2_RTS	SER3_RTS
8	SER0_CTS	SER1_CTS	SER2_CTS	SER3_CTS
9	SER0_RI	NC	NC	NC
^[a]The signals SER1_DTR, SER2_DTR, and SER3_DTR are connected to the corresponding SER1_DSR, SER2_DSR, and SER3_DSR signals. These signals cannot be set or read under program control.

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