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8XC196MC, MD, MH USER'S MANUAL
T1CONTROL
The timer 1 control (T1CONTROL) register determines the clock source, counting direction, and count
rate for timer 1.
7
CE
UD
Bit
Bit
Number
Mnemonic
7
CE
6
UD
5:3
M2:0
2:0
P2:0
Figure 11-8. Timer 1 Control (T1CONTROL) Register
11-16
M2
M1
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
Up/Down
This bit determines the timer counting direction, in selected modes (see
mode bits, M2:0).
0 = count down
1 = count up
EPA Clock Direction Mode Bits
These bits determine the timer clocking source and direction control
source.
M2
M1
M0
Clock Source
0
0
0
F
XTAL
X
0
1
T1CLK pin
0
1
0
F
XTAL
0
1
1
T1CLK pin
1
1
1
quadrature clocking using T1CLK and T1DIR
†
If an external clock is selected, the timer counts on both the rising
and falling edges of the clock.
EPA Clock Prescaler Bits
These bits determine the clock prescaler value.
P2
P1
P0
Prescaler Divisor
0
0
0
divide by 1 (disabled)
0
0
1
divide by 2
0
1
0
divide by 4
0
1
1
divide by 8
1
0
0
divide by 16
1
0
1
divide by 32
1
1
0
divide by 64
1
1
1
enable T1RELOAD
†
At 16 MHz. Use the formula on page 11-6 to calculate the resolution
at other frequencies.
Get other manuals https://www.bkmanuals.com
Reset State:
M0
P2
Function
Direction Source
/4
UD bit (T1CONTROL.6)
1
†
UD bit (T1CONTROL.6)
/4
T1DIR pin
1
†
T1DIR pin
Resolution
250 ns
500 ns
1 µs
2 µs
4 µs
8 µs
16 µs
—
Address:
1F78H
00H
0
P1
P0
†
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