RS-232 C Plus Upgrade Board  (250-1014)    Pinouts    Faxback Doc. # 5170

PIN NUMBER       SIGNAL NAME           PIN NUMBER       SIGNAL NAME
   1             DATA BUS                  21           DATA IN STROBE
   2             DATA BUS                  22           DATA IN STROBE
   3             DATA BUS                  23           DRIVER DISABLE
   4             DATA BUS                  24           CHIP SELECT OUT
   5             DATA BUS                  25           ADDRESS STROBE *
   6             DATA BUS                  26           REGISTER SELECT A2
   7             DATA BUS                  27           REGISTER SELECT A1
   8             DATA BUS                  28           REGISTER SELECT A0
   9             RECEIVE CLK.              29           NO CONNECT
  10             SERIAL INPUT              30           INTERRUPT
  11             SERIAL OUTPUT             31           OUTPUT 2 *
  12             CHIP SELECT               32           REQUEST TO SEND *
  13             CHIP SELECT               33           DATA TERMINAL READY *
  14             CHIP SELECT               34           OUTPUT 1 *
  15             BAUD OUT *                35           MASTER RESET
  16             EXTERNAL CLOCK IN         36           CLEAR TO SEND *
  17             EXTERNAL CLOCK OUT        37           DATA SET READY *
  18             DATA OUT STROBE *         38           RECEIVED LINE SIGNAL
                                                        DETECT *
  19             DATA OUT STROBE           39           RING INDICATOR *
  20             GROUND                    40           +5V

* Denotes active low signal.

(css 08/03/93)