ICS PCI-16REL, User Manual

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3-4 PCI-16REL User’s Guide
Register Description
RD = Read Only bits
R/W = Read/Write bits
Note:
The reed relay ports have a nondestructive read-back capability. Reading back
the ports (A and B) results in the binary complement of the output. This is
particularly useful when writing software that queries the last value written to
prevent inadvertently changing the state of the relays. Also, bits in the Read
Only ports (Base+0,1,4-7) are decoded but not used by the
PCI-16REL.
Address Mode D7 D6 D5 D4 D3 D2 D1 D0
Base+0 RD {0} {0} {0} {0} {0} {0} {0} {0}
Base+1 RD {0} {0} {0} {0} {0} {0} {0} {0}
Base+2 R/W PCD7 PCD6 PCD5 PCD4 PCD3 PCD2 PCD1 PCD0
Base+3 R/W PDD7 PDD6 PDD5 PDD4 PDD3 PDD2 PDD1 PDD0
Base+4 RD {0} {0} {0} {0} {0} {0} {0} {0}
Base+5 RD {0} {0} {0} {0} {0} {0} {0} {0}
Base+6 RD {0} {0} {0} {0} {0} {0} {0} {0}
Base+7 RD {0} {0} {0} {0} {0} {0} {0} {0}