SeaLevel ISO-16.PCI User Manual page 15

PROGRAMMING THE ISO-32.PCIE, CONTINUED
Direct Hardware Control
In systems where the user's program has direct access to the hardware (DOS) the tables that follow give
the mapping and functions that the ISO-16.PCIe provides.
Function Available
RD
RD
Reading the Inputs
The inputs are active Low. If no voltage is applied across one of the differential inputs, it returns a one on
that bit. If an AC or DC voltage is applied, it returns a zero on that bit.
Register Description
All ports are set to input after reset or power up.
Address
Base+0 Input Port A
Base+1 Input Port B
© Sealevel Systems, Inc.
Port
A
B
RD = Read
Mode D7
RD PAD7
RD PBD7
8006e Manual | SL9236 9/2021
Address Hex
Base + 0
Optically Isolated Input Port
Base + 1
D6 D5 D4
PAD6 PAD5 PAD4 PAD3
PBD6 PBD5 PBD4 PBD3
Port Type
D3 D2 D1
PAD2 PAD1 PAD0
PBD2 PBD1 PBD0
D0
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