4-5
Section 4 High-speed Counter
(2) Two-phase quadruple multiplication
This mode counts at the leading and trailing edges of A-phase (PA pin) and B-phase (PB pin) pulses. Four is counted per cycle.
The timing of incremental or decremental counting
<Timing of incremental counting>
At the leading edge of B-phase pulse while A-phase is “H”
At the trailing edge of B-phase pulse while A-phase is “L”
At the trailing edge of A-phase pulse while B-phase is “H”
At the leading edge of A-phase pulse while B-phase is “L”
<Timing of decremental counting>
At the trailing edge of B-phase pulse while A-phase is “H”
At the leading edge of B-phase pulse while A-phase is “L”
At the leading edge of A-phase pulse while B-phase is “H”
At the trailing edge of A-phase pulse while B-phase is “L”
Current counter value
(%MD10.276)
A-phase
(PA)
B-phase
(PB)
4
4
1
0
0
1
2
2
3
3
5
5
6
6
7
7
8
4-1 High-speed Counter Specifications
