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8XC196NP, 80C196NU USER’S MANUAL
10-20
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
3 RE Re-enable
Re-enable applies to the compare mode only. It allows a compare event
to continue to execute each time the event-time register (EPA
x
_TIME)
matches the reference timer rather than only upon the first time match.
0 = compare function is disabled after a single event
1 = compare function always enabled
2 — Reserved; always write as zero.
EPA
x
_CON (Continued)
x
= 0–3
Address:
Reset State:
Table 10-2 on page 10-3
00H
The EPA control (EPA
x
_CON) registers control the functions of their assigned capture/compare
channels. The registers for EPA0 andEPA2 are identical. The registers for EPA1 and EPA3 have an
additional bit, the remap bit. This added bit (bit 8) requires an additional byte, so EPA1_CON and
EPA3_CON must be addressed as words, while the others can be addressed as bytes.
15 8
x
= 1, 3 ———— ———RM
7 0
TB CE M1 M0 RE — ROT ON/RT
7 0
x
= 0, 2 TB CE M1 M0 RE — ROT ON/RT
Bit
Number
Bit
Mnemonic
Function
†
These bits apply to the EPA1_CON and EPA3_CON registers only.
Figure 10-10. EPA Control (EPA
x
_CON) Registers (Continued)