mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 375

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Read: Always read $00 in normal modes
Write: Unimplemented in normal modes
8.3.2.8
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
8.3.2.9
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.
Any value written to this register will cause the scale counter to load the new scale value (PWMSCLA).
Freescale Semiconductor
Reset
Reset
W
W
R
R
Clock SA = Clock A / (2 * PWMSCLA)
Reserved Register (PWMPRSC)
PWM Scale A Register (PWMSCLA)
0
0
0
0
7
7
Writing to this register when in special modes can alter the PWM
functionality.
Writing to this register when in special modes can alter the PWM
functionality.
When PWMSCLA = $00, PWMSCLA value is considered a full scale value
of 256. Clock A is thus divided by 512.
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
Figure 8-10. Reserved Register (PWMPRSC)
Figure 8-9. Reserved Register (PWMTST)
MC9S12XDP512 Data Sheet, Rev. 2.17
0
0
0
0
5
5
NOTE
NOTE
NOTE
0
0
0
0
4
4
0
0
0
0
3
3
Chapter 8 Pulse-Width Modulator (S12PWM8B8CV1)
0
0
0
0
2
2
0
0
0
0
1
1
0
0
0
0
0
0
375