Frequency Modulated Phase Locked Loop and System Clocks (FMPLL)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
11-20
Freescale Semiconductor
11.4.1.2
Software Controlled Power Management/Clock Gating
Some of the IP modules on this device support software controlled power management/clock gating
whereby the application software can disable the non-memory-mapped portions of the modules by writing
to module disable (MDIS) bits in registers within the modules. The memory-mapped portions of the
modules are clocked by the system clock when they are being accessed. The NPC can be configured to
disable the MCKO signal when there are no Nexus messages pending. The H7FA Flash array can be
disabled by writing to a bit in the Flash register map.
The modules that implemented software controlled power management/clock gating are listed in
along with the registers and bits that disable each module. The software controlled clocks are
enabled when the MCU comes out of reset.
11.4.1.3
Clock Dividers
Each of the CLKOUT, MCKO, and ENGCLK dividers provides a nominal 50% duty cycle clock to an
output pin. There is no guaranteed phase relationship between CLKOUT, MCKO, and ENGCLK.
ENGCLK is not synchronized to any I/O pins.
11.4.1.3.1
External Bus Clock (CLKOUT)
The external bus clock (CLKOUT) divider can be programmed to divide the system clock by two or four
based on the settings of the EBDF bit field in the SIU external clock control register (SIU_ECCR). The
reset value of the EBDF selects a CLKOUT frequency of one half of the system clock frequency. The EBI
Table 11-6. Software Controlled Power Management/Clock Gating Support
Module Name
Register Name
Bit Names
DSPI B
DSPI_B_MCR
MDIS
DSPI C
DSPI_C_MCR
MDIS
DSPI D
DSPI_D_MCR
MDIS
EBI
EBI_MCR
MDIS
eTPU engine A
ETPUECR_1
MDIS
FlexCAN A
FLEXCAN_A_MCR
MDIS
FlexCAN B
FLEXCAN_B_MCR
MDIS
FlexCAN C
FLEXCAN_C_MCR
MDIS
eMIOS
EMIOS_MCR
MDIS
eSCI A
ESCIA_CR2
MDIS
eSCI B
ESCIB_CR2
MDIS
NPC
NPC_PCR
MCKO_EN, MCKO_GT
1
1
Refer to
Chapter 24, “Nexus Development Interface
.”
Flash array
FLASH_MCR
STOP
2
2
Refer to
.”
Содержание MPC5565
Страница 18: ...MPC5565 Microcontroller Reference Manual Devices Supported MPC5565 MPC5565 RM Rev 1 0 09 2007...
Страница 34: ...MPC5565 Reference Manual Rev 1 0 Freescale Semiconductor 15...
Страница 35: ...MPC5565 Reference Manual Rev 1 0 16 Freescale Semiconductor...
Страница 325: ...Error Correction Status Module ECSM MPC5565 Microcontroller Reference Manual Rev 1 0 8 16 Freescale Semiconductor...
Страница 515: ...External Bus Interface EBI MPC5565 Microcontroller Reference Manual Rev 1 0 12 70 Freescale Semiconductor...
Страница 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Страница 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Страница 577: ...Boot Assist Module BAM MPC5565 Microcontroller Reference Manual Rev 1 0 15 18 Freescale Semiconductor...
Страница 895: ...Deserial Serial Peripheral Interface DSPI MPC5565 Microcontroller Reference Manual Rev 1 0 19 72 Freescale Semiconductor...
Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Страница 1145: ...MPC5565 Register Map MPC5565 Microcontroller Reference Manual Rev 1 0 A 60 Freescale Semiconductor...
Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...