mc68hc908ap8a Freescale Semiconductor, Inc, mc68hc908ap8a Datasheet - Page 145

• Manufacturer Part Number: mc68hc908ap8a
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

9.9.5 TIM Channel Registers
These read/write registers contain the captured TIM counter value of the input capture function or the
output compare value of the output compare function. The state of the TIM channel registers after reset
is unknown.
In input capture mode (MSxB:MSxA = 0:0), reading the high byte of the TIM channel x registers (TCHxH)
inhibits input captures until the low byte (TCHxL) is read.
In output compare mode (MSxB:MSxA ≠ 0:0), writing to the high byte of the TIM channel x registers
(TCHxH) inhibits output compares until the low byte (TCHxL) is written.
Freescale Semiconductor
Address: T1CH0H, $0026 and T2CH0H, $0031
Address: T1CH0L, $0027 and T2CH0L $0032
Address: T1CH1H, $0029 and T2CH1H, $0034
CHxMAX
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
TCHx
OVERFLOW
Bit 15
Bit 15
Bit 7
Bit 7
Bit 7
Bit 7
Figure 9-12. TIM Channel 0 Register High (TCH0H)
Figure 9-14. TIM Channel 1 Register High (TCH1H)
Figure 9-13. TIM Channel 0 Register Low (TCH0L)
COMPARE
PERIOD
OUTPUT
MC68HC908AP A-Family Data Sheet, Rev. 3
14
14
6
6
6
6
OVERFLOW
Figure 9-11. CHxMAX Latency
13
13
5
5
5
5
COMPARE
OUTPUT
Indeterminate after reset
Indeterminate after reset
Indeterminate after reset
OVERFLOW
12
12
4
4
4
4
COMPARE
OUTPUT
11
11
3
3
3
3
OVERFLOW
10
10
2
2
2
2
COMPARE
OUTPUT
OVERFLOW
1
9
1
1
1
9
Bit 0
Bit 8
Bit 0
Bit 0
Bit 0
Bit 8
I/O Registers
145