Intel 8XC196MH, 8XC196MD, 8XC196MC manual T2CONTROL

REGISTERS

T2CONTROL

T2CONTROL	Address:	1F7CH
	Reset State:	00H

The timer 2 control (T2CONTROL) register determines the clock source, counting direction, and count rate for timer 2.

7

CE UD M2 M1

0

M0 P2 P1 P0

Bit	Bit					Function
Number	Mnemonic
7	CE	Counter Enable
		This bit enables or disables the timer. From reset, the timers are
		disabled and not free running.
		0	= disables timer
		1	= enables timer
6	UD	Up/Down
		This bit determines the timer counting direction, in selected modes (see
		mode bits, M2:0).
		0	= count down
		1	= count up
5:3	M2:0	EPA Clock Direction Mode Bits
		These bits determine the timer clocking source and direction source.
		M2		M1	M0	Clock Source	Direction Source
		0		0	0	FXTAL1/4	UD bit (T2CONTROL.6)
		X		0	1	reserved	—
		0		1	0	reserved	—
		0		1	1	reserved	—
		1		0	0	timer 1 overflow	UD bit (T2CONTROL.6)
		1		1	0	timer 1 overflow	same as timer 1
		1		1	1	reserved	—
2:0	P2:0	EPA Clock Prescaler Bits
		These bits determine the clock prescaler value.
		P2		P1	P0	Prescaler		Resolution†
		0		0	0	divide by 1 (disabled)		250 ns
		0		0	1	divide by 2		500 ns
		0		1	0	divide by 4		1 µs
		0		1	1	divide by 8		2 µs
		1		0	0	divide by 16		4 µs
		1		0	1	divide by 32		8 µs
		1		1	0	divide by 64		16 µs
		1		1	1	reserved		—
		†		Resolution at 16 MHz. Use the formula on page 11-6 to calculate the
				resolution at other frequencies.

C-55