K60P100M100SF2RM Datasheet, PDF (210/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Clock Gating
Table 7-2. Module operation in low power modes (continued)
Modules
VREF
12-bit DAC
GPIO
TSI
Stop
FF
static
wakeup
wakeup
VLPR
VLPW
VLPS
FF
FF
FF
FF
FF
static
Human-machine interfaces
FF
FF
wakeup
FF
FF
wakeup
LLS
static
static
static, pins
latched
wakeup⁸
VLLSx
OFF
static
OFF, pins
latched
wakeup⁸
1. Using the LLWU module, the external pins available for this chip do not require the associated peripheral function to be
enabled. It only requires the function controlling the pin (GPIO or peripheral) to be configured as an input to allow a
transition to occur to the LLWU.
2. A 4KB portion of SRAM_U block is left powered on in low power mode VLLS2.
3. FlexRAM is always powered in VLLS3. When the FlexRAM is configured for traditional RAM, optionally powered in VLLS2
mode. When the FlexRAM is configured for EEPROM, off in VLLS2 mode.
4. FlexRAM enabled as EEPROM is not writable in VLPR and writes are ignored. Read accesses to FlexRAM as EEPROM
while in VLPR are allowed. There are no access restrictions for FlexRAM configured as traditional RAM.
5. These components remain powered in BAT power mode.
6. Use an externally generated bit clock or an externally generated audio master clock (including EXTAL).
7. CMP in stop or VLPS supports high speed or low speed external pin to pin or external pin to DAC compares. CMP in LLS
or VLLSx only supports low speed external pin to pin or external pin to DAC compares. Windowed, sampled & filtered
modes of operation are not available while in stop, VLPS, LLS, or VLLSx modes.
8. TSI wakeup from LLS and VLLSx modes is limited to a single selectable pin.
7.7 Clock Gating
To conserve power, the clocks to most modules can be turned off using the SCGCx
registers in the SIM module. These bits are cleared after any reset, which disables the
clock to the corresponding module. Prior to initializing a module, set the corresponding
bit in the SCGCx register to enable the clock. Before turning off the clock, make sure to
disable the module. For more details, refer to the clock distribution and SIM chapters.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
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Freescale Semiconductor, Inc.