ADLINK ACL-8112 Series - Manual (Page 47)

Registers • 39
4.10 Internal Timer/Counter Register
Two 8254 counters are used for periodical triggering of the A/D converter,
with one left for user applications. The 8254 occupies four I/O address
locations in the ACL-8112 as listed below. Users may refer to NEC's or Intel's
data sheet for full detail of the 8254. A summary of the information is
specified in Appendix B.
Address : BASE + 0 ~ BASE + 3
Attribute: read / write
Data Format:
Base + 0 Counter 0 Register ( R/W)
Base + 1 Counter 1 Register ( R/W)
Base + 2 Counter 2 Register ( R/W)
Base + 3 8254 CONTROL BYTE