SeaLevel DIO-32.PCI User Manual page 12

PROGRAMMING THE DIO-32.PCI, CONTINUED
Reading the Outputs
The relay ports return the ones complement of the value that is currently being used to drive the relays.
Writing the Outputs
The output ports are the only ports that can be written. The relays on a standard DIO-32.PCI are normally
open. To close a relay a one must be written to the appropriate 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
Base+2 Output Port C
Base+3 Output Port D
Base+4
Base+5 Interrupt Status
Interrupt Control
When enabled, interrupts are generated on Port A bit D0.
IRQEN
IRC0
IRC1
© Sealevel Systems, Inc.
Mode D7
RD PAD7
RD PBD7
RD/WR PCD7
RD/WR PDD7
RD 0
RD/WR IRQEN
Interrupt enable 1 = enabled
Interrupt mode select, see table below
Interrupt mode select, see table below
8004 Manual | SL9022 9/2021
D6 D5 D4
PAD6 PAD5 PAD4 PAD3
PBD6 PBD5 PBD4 PBD3
PCD6 PCD5 PCD4 PCD3
PDD6 PDD5 PDD4 PDD3
0 0 0
IRQST 0 0
0 = disabled (0 on power up)
D3 D2 D1
PAD2 PAD1 PAD0
PBD2 PBD1
PCD2 PCD1 PCD0
PDD2 PDD1 PDD0
0 0 0
0 0 IRC1
D0
PBD0
0
IRC0
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