MC68HC908GT16_07 Datasheet, PDF (225/292 Pages) Freescale Semiconductor, Inc – Microcontrollers

Functional Description
Addr. Register Name
$002C
Timer 2 Counter ^Read:
Register High (T2CNTH) Write:
See page 232. _Reset:
$002D
Timer 2 Counter ^Read:
Register Low (T2CNTL) Write:
See page 232. _Reset:
$002E
Timer 2 Counter Modulo ^Read:
Register High (T2MODH) Write:
See page 233. _Reset:
$002F
Timer 2 Counter Modulo ^Read:
Register Low (T2MODL) Write:
See page 233. _Reset:
Timer 2 Channel 0 Status and ^Read:
$0030 Control Register (T2SC0) Write:
See page 233. _Reset:
$0031
Timer 2 Channel 0 ^Read:
Register High (T2CH0H) Write:
See page 236. _Reset:
$0032
Timer 2 Channel 0 ^Read:
Register Low (T2CH0L) Write:
See page 236. _Reset:
Timer 2 Channel 1 Status and ^Read:
$0033 Control Register (T2SC1) Write:
See page 234. _Reset:
$0034
Timer 2 Channel 1 ^Read:
Register High (T2CH1H) Write:
See page 236. _Reset:
$0035
Timer 2 Channel 1 ^Read:
Register Low (T2CH1L) Write:
See page 236. _Reset:
Bit 7
Bit 15
0
Bit 7
0
Bit 15
1
Bit 7
1
CH0F
0
0
Bit 15
Bit 7
CH1F
0
0
Bit 15
Bit 7
6
5
14
13
0
0
6
5
0
14
1
6
1
CH0IE
0
14
0
13
1
5
1
MS0B
0
13
6
5
0
CH1IE
0
0
14
13
6
5
= Unimplemented
4
3
2
12
11
10
0
0
0
4
3
2
0
0
0
12
11
10
1
1
1
4
3
2
1
1
1
MS0A ELS0B ELS0A
0
0
0
12
11
10
Indeterminate after reset
4
3
2
Indeterminate after reset
MS1A ELS1B ELS1A
0
0
0
12
11
10
Indeterminate after reset
4
3
2
Indeterminate after reset
1
Bit 0
9
Bit 8
0
0
1
Bit 0
0
9
1
1
1
TOV0
0
9
0
Bit 8
1
Bit 0
1
CH0MAX
0
Bit 8
1
Bit 0
TOV1
0
9
CH1MAX
0
Bit 8
1
Bit 0
Figure 18-3. TIM I/O Register Summary (Sheet 2 of 2)
18.4.1 TIM Counter Prescaler
The TIM clock source can be one of the seven prescaler outputs. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in the TIM status and control register
select the TIM clock source.
18.4.2 Input Capture
With the input capture function, the TIM can capture the time at which an external event occurs. When an
active edge occurs on the pin of an input capture channel, the TIM latches the contents of the TIM counter
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Freescale Semiconductor
225