Intel 8XC196NP, 80C196NU, Microcontroller manual Capture Mode Event, Compare Mode Action

8XC196NP, 80C196NU USER’S MANUAL

EPAx_CON (Continued)	Address:	Table 10-2 on page 10-3
x = 0–3	Reset State:	00H

The EPA control (EPAx_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.

x = 1, 3

x = 0, 2

15

—	—	—	—
7
TB	CE	M1	M0
7
TB	CE	M1	M0

8

— — — RM

0

RE — ROT ON/RT

0

RE — ROT ON/RT

Bit	Bit			Function
Number	Mnemonic
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
		0	0	no 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 (EPAx_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.

†These bits apply to the EPA1_CON and EPA3_CON registers only.

Figure 10-10. EPA Control (EPAx_CON) Registers (Continued)

10-20