Chapter 9 Pulse-Width Modulator (S12PWM8B8CV2)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
331
The clock source of each PWM channel is determined by PCLKx bits in PWMCLK and PCLKABx bits
in PWMCLKAB (see
Section 9.3.2.7, “PWM Clock A/B Select Register (PWMCLKAB)
). For Channel
0, 1, 4, 5, the selection is shown in
; For Channel 2, 3, 6, 7, the selection is shown in
Table 9-5. PWM Channel 0, 1, 4, 5 Clock Source Selection
Table 9-6. PWM Channel 2, 3, 6, 7 Clock Source Selection
9.3.2.4
PWM Prescale Clock Select Register (PWMPRCLK)
This register selects the prescale clock source for clocks A and B independently.
Read: Anytime
Write: Anytime
NOTE
PCKB2–0 and PCKA2–0 register bits can be written anytime. If the clock
pre-scale is changed while a PWM signal is being generated, a truncated or
stretched pulse can occur during the transition.
Table 9-4. PWMCLK Field Descriptions
Note:
Bits related to available channels have functional significance. Writing to unavailable bits has no effect. Read from
unavailable bits return a zero
Field
Description
7-0
PCLK[7:0]
Pulse Width Channel 7-0 Clock Select
0 Clock A or B is the clock source for PWM channel 7-0, as shown in
.
1 Clock SA or SB is the clock source for PWM channel 7-0, as shown in
.
PCLKAB[0,1,4,5] PCLK[0,1,4,5]
Clock Source Selection
0
0
Clock A
0
1
Clock SA
1
0
Clock B
1
1
Clock SB
PCLKAB[2,3,6,7] PCLK[2,3,6,7]
Clock Source Selection
0
0
Clock B
0
1
Clock SB
1
0
Clock A
1
1
Clock SA
Module Base + 0x0003
7
6
5
4
3
2
1
0
R
0
PCKB2
PCKB1
PCKB0
0
PCKA2
PCKA1
PCKA0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 9-6. PWM Prescale Clock Select Register (PWMPRCLK)
Содержание MC9S12ZVHL32
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Страница 686: ...Chapter 20 ECC Generation module SRAM_ECCV1 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 686 Freescale Semiconductor...
Страница 752: ...Chapter 22 Supply Voltage Sensor BATSV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 752 Freescale Semiconductor...
Страница 774: ...Chapter 23 LIN Physical Layer S12LINPHYV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 774 Freescale Semiconductor...
Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
Страница 794: ...Appendix B ADC Electricals S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 794 Freescale Semiconductor...
Страница 798: ...Appendix D IRC Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 798 Freescale Semiconductor...
Страница 802: ...Appendix F MSCAN Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 802 Freescale Semiconductor...
Страница 806: ...Appendix G NVM Electrical Parameters S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 806 Freescale Semiconductor...
Страница 810: ...Appendix H BATS Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 810 Freescale Semiconductor...
Страница 816: ...Appendix K OSC32K Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 816 Freescale Semiconductor...
Страница 822: ...Appendix L SPI Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 822 Freescale Semiconductor...
Страница 826: ...Appendix M LINPHY Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 826 Freescale Semiconductor...
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