MC68HC05C9A Datasheet, PDF (40/124 Pages) Freescale Semiconductor, Inc – Microcontrollers

Low-Power Modes
6.3 Wait Mode
The WAIT instruction places the MCU in a low-power consumption mode, but wait mode consumes more
power than stop mode. All central processor unit (CPU) action is suspended, but the timer, serial
communications interface (SCI), serial peripheral interface (SPI), and the oscillator remain active. Any
interrupt or reset will cause the MCU to exit wait mode.
During wait mode, the I bit in the CCR is cleared to enable interrupts. All other registers, memory, and I/O
lines remain in their previous state. The timer, SCI, and SPI may be enabled to allow a periodic exit from
the wait mode.
MC68HC05C9A Advance Information Data Sheet, Rev. 5.1
40
Freescale Semiconductor