Inova High Performance CPU board ICP-PII Manual de usuario descargar pdf (Pagina 65)

Appendix A

IPB-FPE8

CompactPCI

A1.8 COM1 Interface

The COM1 port features a complete set of handshaking and modem control signals, maskable

interrupt generation and high-speed data transfer rates. A front-panel with COM1, mouse and

keyboard interfaces is either integrated into an 8HP standard CPU front-panel or available as a

separate 4HP unit. The piggyback located behind these interfaces connects to the CPU-mounted

J11 connector.

Figure A1.8 COM1 Interface Pinout

Table A1.8 COM1 Connector Signals

Note:

The standard CPU configuration has

COM1 set for RS232 communication.

However, this device can be configured to

observe a two-wire, non galvanically

separated, RS485 protocol. The data

direction is governed by controlling the

UART’s RTS signal. Writing a hex value of

0B to this register allows data to be

transmitted. Writing 1B to this register

configures the device to receive data.

RS232 RS485

1 DCD

2 RxD RxD, TxD +

3 TxD RxD, TxD -

4 DTR

5 GND

6 DSR

7 RTS

8 CTS

9RI

Pin No.

Signal

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 93 94

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Inova High Performance CPU board ICP-PII Manual de usuario Pagina 65