S912XEQ384J3MALR Freescale Semiconductor, S912XEQ384J3MALR Datasheet - Page 704

• Manufacturer Part Number: S912XEQ384J3MALR
• Description: S912XEQ Series 16 Bit 50 Mhz 384 KB Flash 24 KB Ram Microcontroller - LQFP-112
• Manufacturer: Freescale Semiconductor

Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
Write: Unimplemented in normal modes
19.3.2.9
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).
Read: Anytime
Write: Anytime (causes the scale counter to load the PWMSCLA value)
19.3.2.10 PWM Scale B Register (PWMSCLB)
PWMSCLB is the programmable scale value used in scaling clock B to generate clock SB. Clock SB is
generated by taking clock B, dividing it by the value in the PWMSCLB register and dividing that by two.
Any value written to this register will cause the scale counter to load the new scale value (PWMSCLB).
704
Module Base + 0x0008
Module Base + 0x0009
Reset
Reset
W
W
R
R
Clock SA = Clock A / (2 * PWMSCLA)
Clock SB = Clock B / (2 * PWMSCLB)
Bit 7
Bit 7
PWM Scale A Register (PWMSCLA)
0
0
7
7
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.
When PWMSCLB = $00, PWMSCLB value is considered a full scale value
of 256. Clock B is thus divided by 512.
0
0
6
6
6
6
Figure 19-11. PWM Scale A Register (PWMSCLA)
Figure 19-12. PWM Scale B Register (PWMSCLB)
MC9S12XE-Family Reference Manual Rev. 1.24
0
0
5
5
5
5
NOTE
NOTE
NOTE
0
0
4
4
4
4
0
0
3
3
3
3
0
0
2
2
2
2
Freescale Semiconductor
0
0
1
1
1
1
Bit 0
Bit 0
0
0
0
0