mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 187

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

11.5.1 TIM Counter Prescaler
11.5.2 Input Capture
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
Addr.
$0032
$0033
$0034
$0035
Timer 2 Channel 1 Status
Register High (T2CH1H)
Register Low (T2CH0L)
Register Low (T2CH1L)
Register Name
and Control Register
Timer 2 Channel 0
Timer 2 Channel 1
Timer 2 Channel 1
(T2SC1)
Figure 11-2. TIM I/O Register Summary (Sheet 3 of 3)
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.
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.
Reset:
Reset:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
CH1F
Bit 15
Bit 7
Bit 7
Bit 7
0
0
Timer Interface Module (TIM)
= Unimplemented
CH1IE
14
6
6
0
6
13
5
5
0
0
5
Indeterminate after reset
Indeterminate after reset
Indeterminate after reset
MS1A
12
4
4
0
4
ELS1B
11
3
3
0
3
Timer Interface Module (TIM)
ELS1A
10
2
2
0
2
Functional Description
TOV1
1
1
0
9
1
Data Sheet
CH1MAX
Bit 0
Bit 0
Bit 8
Bit 0
0
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