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RS232 RS422 RS485 78芯专用电缆
1200b/s 1800b/s 2400b/s 4800b/s
RS-232和RS-422A RS-232 RS-422A DH+
DEBUG1-232 DEBUG2-232 RS232 OMC2
10101010 01010101 00000000 11111111
0v 3.3v +5v~+15v -5v~-15v
串口; RS-422; RS-232; RS-485。
1200b/s 1800b/s 2400b/s 4800b/s