IP482 Industrial I/O Pack User’s Manual Counter Timer Module
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Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com
15
BIT
FUNCTION
0
Counter/Timer 1 Interrupt Pending/Clear
1
Counter/Timer 2 Interrupt Pending/Clear
2
Counter/Timer 3 Interrupt Pending/Clear
3
Counter/Timer 4 Interrupt Pending/Clear
4
Counter/Timer 5 Interrupt Pending/Clear
5
Counter/Timer 6 Interrupt Pending/Clear
6
Counter/Timer 7 Interrupt Pending/Clear
7
Counter/Timer 8 Interrupt Pending/Clear
8
Counter/Timer 9 Interrupt Pending/Clear
9
Counter/Timer 10 Interrupt Pending/Clear
10-15
Not Used
1
A Counter/Timer that is not interrupt enabled will never set its interrupt
status flag. A Counter/Timer interrupt can be cleared by writing a “1” to its
bit position in the Interrupt Status/Clear Register (writing a “1” acts as a
reset signal to clear the set state). The interrupt will be generated again, if
the condi
tion which caused the interrupt to occur remains. Writing “0” to a
bit location has no effect. That is, a pending interrupt will remain pending.
Writing to this register is possible via 16-bit or 8-bit data transfers.
A power-up or system reset clears all interrupts, setting all bits in the
Interrupt Status/Clear Register to logic “0”.
Counter Trigger Register (Write) - (Base + 04H)
This register is used to implement software triggering for all
counter/timers. Writing a 1 to the counter’s corresponding trigger bit of this
register will cause the counter function to be triggered. Table 3.5 identifies
the trigger bit location corresponding to each of the counters. The contents
of this register are not stored and merely act to trigger the corresponding
counters.
BIT
FUNCTION
0
Counter 1 Trigger
1
1
Counter 2 Trigger
1
2
Counter 3 Trigger
1
3
Counter 4 Trigger
1
4
Counter 5 Trigger
1
5
Counter 6 Trigger
1
6
Counter 7 Trigger
1
7
Counter 8 Trigger
1
8
Counter 9 Trigger
1
9
Counter 10 Trigger
1
10-15
Not Used
1
CONTROL REGISTERS
Table 3.4:
IP482
Counter/Timer Interrupt
Status/Clear
1. All bits labeled “Not Used”
will return logic “0” when read.
Table 3.5:
IP482 Counter
Trigger Register
1. All bits will return logic “0”
when read.
