MC9S12P128 Datasheet, PDF (341/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Pulse-Width Modulator (PWM8B6CV1) Block Description
Read: always read 0x0000 in normal modes
Write: unimplemented in normal modes
NOTE
Writing to this register when in special modes can alter the PWM
functionality.
10.3.2.8 Reserved Register (PWMPRSC)
This register is reserved for factory testing of the PWM module and is not available in normal modes.
Module Base + 0x0007
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 10-10. Reserved Register (PWMPRSC)
Read: always read 0x0000 in normal modes
Write: unimplemented in normal modes
NOTE
Writing to this register when in special modes can alter the PWM
functionality.
10.3.2.9 PWM Scale A Register (PWMSCLA)
PWMSCLA is the programmable scale value used in scaling clock A to generate clock SA. Clock SA is
generated by taking clock A, dividing it by the value in the PWMSCLA register and dividing that by two.
Clock SA = Clock A / (2 * PWMSCLA)
NOTE
When PWMSCLA = 0x0000, PWMSCLA value is considered a full scale
value of 256. Clock A is thus divided by 512.
Any value written to this register will cause the scale counter to load the new scale value (PWMSCLA).
Module Base + 0x0008
7
6
5
4
3
2
1
0
R
Bit 7
6
5
4
3
2
1
Bit 0
W
Reset
0
0
0
0
0
0
0
0
Figure 10-11. PWM Scale A Register (PWMSCLA)
S12P-Family Reference Manual, Rev. 1.12
Freescale Semiconductor
341