AMT Datasouth Accel-7350 Service Manual page 77

Main Function
Controls centronics I/F
Controls serial I/F
Port Explanation
(1) A0-A5(Input): Address bus.
(2) D0-D7(I/O): Data bus.
(3) XCSIN(Input): Chip select.
(4) XRD, XWR(Input): Read signal, write signal.
(5) INTREQ(Output): "High" for centronics I/F initial input.
(6) DTXREQ(Output): "High" for centronics I/F data input.
(7) SYNC0(Input): 12.5 MHz clock.
(8) SYNC2(Output): Clock for serial I/F baud setting.
(9) CDATA0-7(Input): Centronics I/F data input.
(10) XACK, BUSY, POUT, XERR, SLCTOUT(Output): Centronics I/F signal.
(11) XSTB, XATFD, XINIT, XSLCTIN(Input): Centronics I/F signal.
(12) DTR(Output): Serial I/F signal.
(13) CTS(Input): Serial I/F signal.
(14) SWCLK, SWLTCH(Output): For detection of Panel key.
(15) SWIN(Input): For detection of Panel key.
(16) ENCODE2-3(Input): For detection of HA encoder.
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