MC68HC908GT16 Datasheet, PDF (66/412 Pages) Motorola, Inc – Microcontrollers

Low-Power Modes
3.11 Enhanced Serial Communications Interface Module (SCI)
3.11.1 Wait Mode
The enhanced serial communications interface (ESCI), or SCI module
for short, module remains active in wait mode. Any enabled CPU
interrupt request from the SCI module can bring the MCU out of wait
mode.
If SCI module functions are not required during wait mode, reduce power
consumption by disabling the module before executing the WAIT
instruction.
3.11.2 Stop Mode
The SCI module is inactive in stop mode. The STOP instruction does not
affect SCI register states. SCI module operation resumes after the MCU
exits stop mode.
Because the internal clock is inactive during stop mode, entering stop
mode during an SCI transmission or reception results in invalid data.
3.12 Serial Peripheral Interface Module (SPI)
3.12.1 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.
Technical Data
66
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
Low-Power Modes
MOTOROLA