![NXP Semiconductors MPC5605BK Скачать руководство пользователя страница 122](http://html.mh-extra.com/html/nxp-semiconductors/mpc5605bk/mpc5605bk_reference-manual_1721852122.webp)
Chapter 6 Clock Description
MPC5606BK Microcontroller Reference Manual, Rev. 2
122
Freescale Semiconductor
If STRB_BYPASS is high, the strobe signal is bypassed. In this case, control bits (MOD_PERIOD[12:0],
INC_STEP[14:0], SPREAD_CONTROL) need to be static or hardwired to constant values. The control
bits must be changed only when the FMPLL is in powerdown mode.
The modulation depth in % is
NOTE
The user must ensure that the product of INCTEP and MODPERIOD is less
than (2
15
– 1).
Figure 6-10. Frequency modulation
6.7.6.4
Powerdown mode
To reduce consumption, the FMPLL can be switched off when not required by programming the registers
ME_x_MC on the MC_ME module.
6.7.7
Recommendations
To avoid any unpredictable behavior of the FMPLL clock, it is recommended to follow these guidelines:
•
The FMPLL VCO frequency should reside in the range 256 MHz to 512 MHz. Care is required
when programming the multiplication and division factors to respect this requirement.
•
Once the PLL has been locked, only the output divider can be changed.
•
Use PLL progressive clock switching to ramp system clock (/8, /4, /2, /1) automatically for the case
when PLL is enabled and selected as system clock.
ModulationDepth
100
5
INCSTEPxMODPERIOD
2
15
1
–
MDF
---------------------------------------------------------------------------------------------
=
Содержание MPC5605BK
Страница 2: ...This page is intentionally left blank...
Страница 20: ...MPC5606BK Microcontroller Reference Manual Rev 2 20 Freescale Semiconductor...
Страница 103: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 103 Clocks and power...
Страница 104: ...MPC5606BK Microcontroller Reference Manual Rev 2 104 Freescale Semiconductor This page is intentionally left blank...
Страница 243: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 243 Core platform modules...
Страница 244: ...MPC5606BK Microcontroller Reference Manual Rev 2 244 Freescale Semiconductor This page is intentionally left blank...
Страница 395: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 395 Communication modules...
Страница 396: ...MPC5606BK Microcontroller Reference Manual Rev 2 396 Freescale Semiconductor This page is intentionally left blank...
Страница 548: ...Chapter 24 LIN Controller LINFlexD MPC5606BK Microcontroller Reference Manual Rev 2 548 Freescale Semiconductor...
Страница 645: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 643 Timers...
Страница 646: ...MPC5606BK Microcontroller Reference Manual Rev 2 644 Freescale Semiconductor This page is intentionally left blank...
Страница 715: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 713 ADC system...
Страница 716: ...MPC5606BK Microcontroller Reference Manual Rev 2 714 Freescale Semiconductor This page is intentionally left blank...
Страница 787: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 787 Memory...
Страница 788: ...MPC5606BK Microcontroller Reference Manual Rev 2 788 Freescale Semiconductor This page is intentionally left blank...
Страница 893: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 893 Integrity...
Страница 894: ...MPC5606BK Microcontroller Reference Manual Rev 2 894 Freescale Semiconductor This page is intentionally left blank...
Страница 943: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 943 Debug...
Страница 944: ...MPC5606BK Microcontroller Reference Manual Rev 2 944 Freescale Semiconductor This page is intentionally left blank...