Advantech UNO-3074, User Manual, Page: 35 / 80

27 Chapter 2
2.7.8 Counter Output Destination
You can choose the output destination of counter 0 and counter 1 by setting
“Output Destination control bits”- CTR0OutSet and CTR1OutSet.
2.7.9 Counter Interrupt Flag
The interrupt flag bit is a flag indicating the status of an interrupt. It is a
readable/writable bit. To find the status of the interrupt, you have to read
the bit value; to clear the interrupt, you have to write “1” to this bit. This bit
must first be cleared to service the next coming interrupt. Besides, you can
choose if counter 0 or counter 1 generate interrupt signal by configuring
“CTR0IntSet” and “CTR1IntSet” control bit.
Table 2.14: Counter Gate Source Control Bit
CTR0GateSet 0 Gate source from “CTR0Gate” control bit (Default)
1 Gate source from digital input 0 (DI0) channel
CTR1GateSet 0 Gate source from “CTR1Gate” control bit (Default)
1 Gate source from digital input 2 (DI2) channel
Table 2.15: Counter Output Destination Control Bit
CTR0OutSet 0 Output destination to “CTR0Out” status bit (Default)
1 Output destination to “CTR0Out” status bit and digital output
2 (DO2) channel
CTR1OutSet 0 Output destination to “CTR1Out” status bit. (Default)
1 Output destination to “CTR1Out” status bit and digital output
3 (DO3) channel
Table 2.16: Counter Interrupt Flag Control Bit
CTR0F, CTR1F Counter Interrupt Status
Read 0 No interrupt
1 Interrupt occur
Write 0 Don’t care
1 Clear interrupt
CTR0IntSet, CTR1IntSet Counter Interrupt Control
0 Disable (Default)
1 Enable