Microsoft UNO-3074 user manual 4 32-bit Counter Function Block CTR32Set=1, Counter Clock Source

2.7.4 32-bit Counter Function Block (CTR32Set=1)

Figure 2.10: 32-bit Counter Function Block

2.7.5 Counter Clock Source

There are two clock sources available for the user counters by setting counter clock control bits - CTR0CLKSet and CTR1CLKSet.

Table 2.12: Counter Clock Source Control Bit

CTR0CLKSet	0	Internal clock (default)
	1	External clock from digital input 1 (DI1) channel
CTR1CLKSet	0	Internal clock (default)

1External clock from digital input 3 (DI3) channel

2.7.6Counter Internal Clock

There are four frequency options to choose according to applications, and it’s set by internal clock control bits - S0 and S1.

Table 2.13: Counter Internal Clock Control Bit

S1	S0	Time base
0	0	100 KHz (default)
0	1	10 KHz
1	0	1 KHz
1	1	100 Hz

2.7.7 Counter Gate Source

The gate sources you select determine what kind of gate input signal to enable your counter/timer when receiving clock input. There are two gate sources available for the user counters by setting gate source control bits - CTR0GateSet and CTR1GateSet.

UNO-3074 User Manual 26