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Frequency Modulated Phase Locked Loop and System Clocks (FMPLL)
MPC5566 Microcontroller Reference Manual, Rev. 2
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 and 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.
Table 11-6. Software Controlled Power Management/Clock Gating Support
Module Name
Register Name
Bit Names
DSPI A
DSPI_A_MCR
MDIS
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
ETPU_ECR_1
MDIS
eTPU engine B
ETPU_ECR_2
MDIS
FlexCAN A
CAN_A_MCR
MDIS
FlexCAN B
CAN_B_MCR
MDIS
FlexCAN C
CAN_C_MCR
MDIS
FlexCAN D
CAN_D_MCR
MDIS
eMIOS
EMIOS_MCR
MDIS
eSCI A
ESCI_A_CR2
MDIS
eSCI B
ESCI_B_CR2
MDIS
Nexus port controller (NPC)
NPC_PCR
MCKO_EN, MCKO_GT
1
1
Refer to
Chapter 25, “Nexus Development Interface
.”
Flash array
FLASH_MCR
STOP
2
2
Refer to
.”
Summary of Contents for MPC5566
Page 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Page 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Page 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Page 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Page 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Page 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Page 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...