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C-15
REGISTERS
COMPx_CON
COMP
x
_CON
x
= 0–3 (8XC196MC, MH)
x
= 0–5 (8XC196MD)
Address:
Reset State:
Table C-3
The EPA compare control (COMP
x
_CON) registers determine the function of the EPA compare
channels.
7 0
x
= 0, 2, 4 TB CE M1 M0 RE WGR ROT RT
7 0
x
= 1, 3, 5 TB CE M1 M0 RE AD ROT RT
7 TB Time Base Select
Specifies the reference timer.
0 = timer 1 is the reference timer and timer 2 is the opposite timer
1 = timer 2 is the reference timer and timer 1 is the opposite timer
A compare event (start of an A/D conversion; clearing, setting, or toggling
an output pin; and/or resetting either timer) occurs when the reference
timer matches the time programmed in the event-time register.
6 CE Compare Enable
This bit enables the compare function.
0 = compare function disabled
1 = compare function enabled
5:4 M1:0 EPA Mode Select
Specifies the type of compare event.
M1 M0
0 0 no output
0 1 clear output pin
1 0 set output pin
1 1 toggle output pin
3 RE Re-enable
Allows a compare event to continue to execute each time the event-time
register (COMP
x
_TIME) matches the reference timer rather than only
upon the first time match.
0 = compare function will drive the output only once
1 = compare function always enabled