mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 380

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Timer Interface Module A (TIMA-6)
22.4 Functional Description
22.4.1 TIMA Counter Prescaler
Technical Data
$0034
$0035
$0036
$0037
Addr.
Timer A Channel 5 Status and
Timer A Channel 4 Register
Timer A Channel 5 Register
Timer A Channel 5 Register
Control Register (TASC5)
Register Name
High (TACH5H)
Low (TACH4L)
Low (TACH5L)
See page 403.
See page 397.
See page 403.
See page 403.
Figure 22-2. TIMA I/O Register Summary (Sheet 3 of 3)
Figure 22-1
TIMA is the 16-bit TIMA counter that can operate as a free-running
counter or a modulo up-counter. The TIMA counter provides the timing
reference for the input capture and output compare functions. The TIMA
counter modulo registers, TAMODH–TAMODL, control the modulo
value of the TIMA counter. Software can read the TIMA counter value at
any time without affecting the counting sequence.
The six TIMA channels are programmable independently as input
capture or output compare channels.
The TIMA clock source can be one of the seven prescaler outputs or the
TIMA clock pin, PTD6/TACLK. The prescaler generates seven clock
rates from the internal bus clock. The prescaler select bits, PS[2:0], in
the TIMA status and control register select the TIMA clock source.
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Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Timer Interface Module A (TIMA-6)
CH5F
Bit 15
Bit 7
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Bit 7
Bit 7
shows the TIMA structure. The central component of the
0
0
= Unimplemented
CH5IE
14
6
6
0
6
13
R
5
5
0
0
5
Indeterminate after reset
Indeterminate after reset
Indeterminate after reset
MS5A
12
R
4
4
0
4
= Reserved
ELS5B
11
3
3
0
3
MC68HC908AS60 — Rev. 1.0
ELS5A
10
2
2
0
2
TOV5
1
1
0
9
1
CH5MAX
Bit 0
Bit 0
Bit 8
Bit 0
0