Advantech APAX-5000 Series User Manual page 80

A/B Phase 1X, With Reload, Count Once
Figure 3.14 shows A/B Phase 1X mode, Ch0_A and Ch0_B provide the counting
function. When the counter0 is enabled, the couner0 starts to count. If the counter
value is overflow or underflow, it will reset to the defined value (e.g. 0x33) but won't
keep counting.
Ch0_A
Ch0_B
Counter 0
Enable
Counter 0
Value
Counter0
Underflow
Ch0_A
Ch0_B
Counter 0
Enable
Counter 0
Value
Counter0
Overflow
APAX-5000 I/O Series User Manual
0x33 0x34 0x35 0x34
0x33 0x32 0x31 0x32
Figure 3.28 A/B Phase 1X, With Reload, Count Once
0x33 0x32 0x00
.........
0x33 0x34 0xF..F
.........
72
0x33
0x33