MC68HC908GP32 Datasheet, PDF (349/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Timer Interface Module (TIM)
Functional Description
Addr. Register Name
Bit 7
6
5
4
3
2
Read:
Timer 2 Channel 0
Bit 7
6
$0032
Register Low Write:
(T2CH0L)
Reset:
5
4
3
2
Indeterminate after reset
Read: CH1F
0
Timer 2 Channel 1 Status
CH1IE
MS1A ELS1B ELS1A
$0033 and Control Register Write: 0
(T2SC1)
Reset: 0
0
0
0
0
0
$0034
Read:
Timer 2 Channel 1
Bit 15
14
Register High Write:
(T2CH1H)
Reset:
13
12
11
10
Indeterminate after reset
Read:
Timer 2 Channel 1
Bit 7
6
$0035
Register Low Write:
(T2CH1L)
Reset:
5
4
3
2
Indeterminate after reset
= Unimplemented
Figure 22-2. TIM I/O Register Summary (Sheet 3 of 3)
1
Bit 0
1
Bit 0
TOV1 CH1MAX
0
0
9
Bit 8
1
Bit 0
22.5.1 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.
22.5.2 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 into the
TIM channel registers, TCHxH:TCHxL. The polarity of the active edge is
programmable. Input captures can generate TIM CPU interrupt
requests.
MC68HC908GP32•MC68HC08GP32 — Rev. 6
MOTOROLA
Timer Interface Module (TIM)
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Technical Data
347