Datasheet

Chapter 8 Pulse-Width Modulator (S12PWM8B8CV1)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor 375
Read: Always read $00 in normal modes
Write: Unimplemented in normal modes
NOTE
Writing to this register when in special modes can alter the PWM
functionality.
8.3.2.8 Reserved Register (PWMPRSC)
This register is reserved for factory testing of the PWM module and is not available in normal modes.
Read: Always read $00 in normal modes
Write: Unimplemented in normal modes
NOTE
Writing to this register when in special modes can alter the PWM
functionality.
8.3.2.9 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 = $00, 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).
76543210
R00000000
W
Reset 00000000
= Unimplemented or Reserved
Figure 8-9. Reserved Register (PWMTST)
76543210
R00000000
W
Reset 00000000
= Unimplemented or Reserved
Figure 8-10. Reserved Register (PWMPRSC)