Chapter 7 S12 Clock, Reset and Power Management Unit (S12CPMU_UHV_V5)
S12ZVHY/S12ZVHL Family Reference Manual, Rev. 1.05
Freescale Semiconductor
251
7.3.2.8
S12CPMU_UHV_V5 PLL Control Register (CPMUPLL)
This register controls the PLL functionality.
Read: Anytime
Write: Anytime if PROT=0 (CPMUPROT register) and PLLSEL=1 (CPMUCLKS register). Else write
has no effect.
NOTE
Write to this register clears the LOCK and UPOSC status bits.
NOTE
Care should be taken to ensure that the bus frequency does not exceed the
specified maximum when frequency modulation is enabled.
Module Base + 0x000A
7
6
5
4
3
2
1
0
R
0
0
FM1
FM0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
Figure 7-11. S12CPMU_UHV_V5 PLL Control Register (CPMUPLL)
Table 7-9. CPMUPLL Field Descriptions
Field
Description
5, 4
FM1, FM0
PLL
Frequency Modulation Enable Bits
— FM1 and FM0 enable frequency modulation on the VCOCLK. This
is to reduce noise emission. The modulation frequency is f
ref
divided by 16. See
for coding.
Table 7-10. FM Amplitude selection
FM1
FM0
FM Amplitude /
f
VCO
Variation
0
0
FM off
0
1
1%
1
0
2%
1
1
4%
Содержание MC9S12ZVHL32
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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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