Measurement Computing PCM-DAS16D/12 - Manual (Page 5)

1 INTRODUCTION
The PCM-DAS16x/12 is a data acquisition and control board for IBM PC
compatible computers with PCMCIA type 2 slots. The heart of the board is
an analog to digital converter. Analog signals are routed to the A/D via either
an 8:1 differential multiplexor (on the PCM-DAS16D/12) or a 16:1 single
ended multiplexor (on the PCM-DAS16S/12) controlled by a register on the
PCM-DAS16x/12. (These two versions of this board will be referred to as
PCM-DAS16x/12 thoughout this manual except where the differences apply.)
The analog input range is fully programmable in both bipolar and unipolar
ranges. An on board pacer clock and external pacer input as well as software
polling may trigger A/D conversions. Transfers may be via software polling,
interrupt service or REP-INSW. A FIFO buffer provides buffering between
the A/D circuit and the PCMCIA bus. Eight digital I/O lines (8 in or out , or,
4 in 4 out) provide a means of sensing and controlling discrete events.
1