DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
‣ 6 comparators are available for software counters while 8 comparators are available for
2 groups of hardware counters ( 4 comparators for each group)
‣ Output timing of software comparator count value equals to comparative value in both
counting up/down modes.
‣ Output timing of the hardware comparator with firmware version 1.xx count value
equals to comparative value+1 in counting-up mode; count value equals to comparative
value -1 in counting-down mode.
‣ Output timing of the hardware comparator with firmware version 2.00 and above count
value equals to comparative value in both counting up/down modes.
8. Difference between software and hardware comparators (it is only applicable to DVP-SE):
‣ 6 comparators are available for software counters while 4 comparators are available for
2 groups of hardware counters ( 2 comparators for each group)
‣ Output timing of software comparator count value equals to comparative value in both
counting up/down modes.
‣ Output timing of the hardware comparator count value equals to comparative value+1
in counting-up mode; count value equals to comparative value -1 in counting-down
mode.
Program Example 1:
Set/reset M0 by applying software comparator
M1000
DCNT C235 K100
DHSCS
K100
C235
M0
‣ When value in C235 varies from 99 to100, DHSCS instruction sets M0 ON. (M1235 =
OFF, C235 counts up)
‣ When value in C235 varies from 101 to100, DHSCR instruction resets M0. (M1235 = ON,
C235 counts down)
‣ Timing diagram for the comparison:
2
1
M0
Counting
No.
101
100
99
98
Count up
Program Example 2:
Set/reset M0 by applying hardware comparator
101 100 99 98
Count down
Time
3-127