IRQ Control Registers 1 and 2
6-11
IRQ Control Registers 1 and 2
Figure 6-1 shows a simplified IRQ circuit for one or more groups of 24
channels.
Figure 6-1. Block Diagram of IRQ Circuit
PR
CLR
CLK
Q
Q
D
V
cc
J1-C0
From IRQ
Control
Register 1
PR
CLR
CLK
Q
Q
D
V
cc
J1-C3
From IRQ
Control
Register 1
PR
CLR
CLK
Q
Q
D
V
cc
J5 -C0
(if present)
From IRQ
Control
Register 2
PR
CLR
CLK
Q
Q
D
V
cc
J5 -C3
(if present)
From IRQ
Control
Register 2
From IRQ Control
Register 1Write
From IRQ Control
Register 2 Write
(if present)
IRQ
Jumper
To
Computer
IRQ Registers
for Group 1
IRQ Registers
for Group 5
(if present)
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