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: http://www.arcetri.astro.it/irlab/doc/library/hwbook/connector/serial/macrs422.html
Дата изменения: Sat Jul 7 01:01:27 2001 Дата индексирования: Sat Dec 22 15:36:51 2007 Кодировка: Поисковые слова: total solar eclipse |
It's possible to connect RS-232 peripheral to the RS-422 port available on Macintosh computers. Use RXD- as RXD, TXD- as TXD, Ground RXD+, Leave TXD+ unconnected, GPi as CD.
(at the computer)
8 PIN MINI-DIN FEMALE at the computer.
Pin | Name | Dir | Description |
---|---|---|---|
1 | HSKo | ![]() |
Output Handshake |
2 | HSKi/CLK | ![]() |
Input Handshake or External Clock |
3 | TXD- | ![]() |
Transmit Data (-) |
4 | GND | ![]() |
Ground |
5 | RXD- | ![]() |
Receive Data (-) |
6 | TXD+ | ![]() |
Transmit Data (+) |
7 | GPi | ![]() |
General Purpose Input |
8 | RXD+ | ![]() |
Receive Data (+) |
Note: Direction is DTE (Computer) relative DCE (Modem).
Note: GPi is connected to SCC Data Carrier Detect (or to Receive/Transmit Clock if the VIA1 SYNC signal is high). Not connected on the Macintosh Plus, Classic, Classic II, LC, LC II or IIsi.
Contributor: Joakim жgren, Pierre Olivier, Ben Harris, Nathan Schmidt
Source:
comp.sys.mac.comm FAQ Part 1,
Apple Tech Info Library, Article ID: TECHINFO-0001699
Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-08