mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 268

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 15 Timer/PWM Module (S08TPMV3)
15.5.5
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 registers are cleared by
reset.
In input capture mode, reading either byte (TPMxCnVH or TPMxCnVL) latches the contents of both bytes
into a buffer where they remain latched until the other half is read. This latching mechanism also resets
268
Reset
Reset
W
W
R
R
Bit 15
Bit 7
TPM Channel Value Registers (TPMxCnVH:TPMxCnVL)
0
0
7
7
CPWMS
0
1
Figure 15-13. TPM Channel Value Register High (TPMxCnVH)
Figure 15-14. TPM Channel Value Register Low (TPMxCnVL)
14
MSnB:MSnA
0
6
0
6
6
XX
1X
00
01
Table 15-8. Mode, Edge, and Level Selection
MC9S08AC60 Series Data Sheet, Rev. 2
13
5
0
5
5
0
ELSnB:ELSnA
X1
X1
01
10
11
01
10
11
10
10
12
0
4
0
4
4
Output compare
Center-aligned
Input capture
Edge-aligned
Mode
PWM
PWM
11
0
3
0
3
3
Capture on falling edge
Capture on rising edge
Set output on compare
High-true pulses (clear
High-true pulses (clear
output on compare-up)
output on compare-up)
10
0
2
0
2
2
Low-true pulses (set
Low-true pulses (set
Capture on rising or
output on compare)
output on compare)
Toggle output on
Clear output on
Configuration
falling edge
compare
compare
only
only
Freescale Semiconductor
1
9
0
1
1
0
Bit 8
Bit 0
0
0
0
0