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8XC196MC, MD, MH USER’S MANUAL
C-18
EPAx_CON
EPA
x
_CON
x
= 0–1 (8XC196MH)
x
= 0–3 (8XC196MC)
x
= 0–5 (8XC196MD)
Address:
Reset State:
Tabl e C-4
The EPA control (EPA
x
_CON) registers control the functions of their assigned capture/compare
channels.
7 0
x
= 0, 2, 4 TB CE M1 M0 RE WGR ROT ON/RT
7 0
x
= 1, 3, 5 TB CE M1 M0 RE AD ROT ON/RT
Bit
Number
Bit
Mnemonic
Function
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 (reloading the waveform generator; starting 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.
When a capture event (falling edge, rising edge, or an edge change on
the EPA
x
pin) occurs, the reference timer value is saved in the EPA event-
time register (EPA
x
_TIME).
6 CE Compare Enable
Determines whether the EPA channel operates in capture or compare
mode.
0 = capture mode
1 = compare mode
5:4 M1:0 EPA Mode Select
In capture mode, specifies the type of event that triggers an input capture.
In compare mode, specifies the action that the EPA executes when the
reference timer matches the event time.
M1 M0 Capture Mode Event
00no capture
0 1 capture on falling edge
1 0 capture on rising edge
1 1 capture on either edge
M1 M0 Compare Mode Action
0 0 no output
0 1 clear output pin
1 0 set output pin
1 1 toggle output pin