MC68HC908GR16 Datasheet, PDF (121/310 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Low-Power Modes
Serial Peripheral Interface Module (SPI)
10.11 Serial Peripheral Interface Module (SPI)
10.11.1 Wait Mode
The serial peripheral interface (SPI) module remains active in wait mode. Any
enabled CPU interrupt request from the SPI module can bring the MCU out of wait
mode.
If SPI module functions are not required during wait mode, reduce power
consumption by disabling the SPI module before executing the WAIT instruction.
10.11.2 Stop Mode
The SPI module is inactive in stop mode. The STOP instruction does not affect SPI
register states. SPI operation resumes after an external interrupt. If stop mode is
exited by reset, any transfer in progress is aborted, and the SPI is reset.
10.12 Timer Interface Module (TIM1 and TIM2)
10.12.1 Wait Mode
The timer interface modules (TIM) remain active in wait mode. Any enabled CPU
interrupt request from the TIM can bring the MCU out of wait mode.
If TIM functions are not required during wait mode, reduce power consumption by
stopping the TIM before executing the WAIT instruction.
10.12.2 Stop Mode
The TIM is inactive in stop mode. The STOP instruction does not affect register
states or the state of the TIM counter. TIM operation resumes when the MCU exits
stop mode after an external interrupt.
10.13 Timebase Module (TBM)
10.13.1 Wait Mode
The timebase module (TBM) remains active after execution of the WAIT
instruction. In wait mode, the timebase register is not accessible by the CPU.
If the timebase functions are not required during wait mode, reduce the power
consumption by stopping the timebase before enabling the WAIT instruction.
10.13.2 Stop Mode
The timebase module may remain active after execution of the STOP instruction if
the oscillator has been enabled to operate during stop mode through the
MC68HC908GR16 — Rev. 1.0
MOTOROLA
Low-Power Modes
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Data Sheet
121