mc9s08gt32a Freescale Semiconductor, Inc, mc9s08gt32a Datasheet - Page 167

• Manufacturer Part Number: mc9s08gt32a
• Description: Hcs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

If the associated port pin is not stable for at least two bus clock cycles before changing to input capture
mode, it is possible to get an unexpected indication of an edge trigger. Typically, a program would clear
status flags after changing channel configuration bits and before enabling channel interrupts or using the
status flags to avoid any unexpected behavior.
10.7.5
These read/write registers contain the captured TPM counter value of the input capture function or the
output compare value for the output compare or PWM functions. The channel value registers are cleared
by reset.
Freescale Semiconductor
CPWMS
Reset
Reset
X
0
1
W
W
R
R
Bit 15
Timer x Channel Value Registers (TPMxCnVH:TPMxCnVL)
Bit 7
MSnB:MSnA
0
0
7
7
XX
XX
1X
00
01
Figure 10-11. Timer x Channel Value Register High (TPMxCnVH)
Figure 10-12. Timer Channel Value Register Low (TPMxCnVL)
14
0
6
0
6
6
ELSnB:ELSnA
Table 10-5. Mode, Edge, and Level Selection
X1
X1
00
01
10
11
00
01
10
11
10
10
MC9S08GB60A Data Sheet, Rev. 1.02
13
0
5
0
5
5
Pin not used for TPM channel; use as an external clock for the TPM or
revert to general-purpose I/O
Output compare
Center-aligned
Input capture
Edge-aligned
Mode
PWM
PWM
12
0
4
0
4
4
Capture on rising edge only
Capture on falling edge only
Capture on rising or falling edge
Software compare only
Toggle output on compare
Clear output on compare
Set output on compare
High-true pulses (clear output on compare)
Low-true pulses (set output on compare)
High-true pulses (clear output on compare-up)
Low-true pulses (set output on compare-up)
11
3
0
3
3
0
10
0
2
0
2
2
Configuration
9
0
1
0
1
1
Timer/PWM (TPM)
Bit 8
Bit 0
0
0
0
0
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