MC68HC908AP16CFB datasheet(209/440 Pages) MOTOROLA

209 / 440 page

Timebase Module (TBM)

Low-Power Modes

MC68HC908AP Family — Rev. 2.5

Data Sheet

MOTOROLA

209

12.6 Low-Power Modes

The WAIT and STOP instructions put the MCU in low power-

consumption standby modes.

12.6.1 Wait Mode

The timebase module 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.

12.6.2 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 stop mode oscillator enable bit (STOP_ICLKDIS,

STOP_RCLKEN, or STOP_XCLKEN) for the selected oscillator in the

CONFIG2 register. The timebase module can be used in this mode to

generate a periodic walk-up from stop mode.

If the oscillator has not been enabled to operate in stop mode, the

timebase module will not be active during stop mode. In stop mode the

timebase register is not accessible by the CPU.

If the timebase functions are not required during stop mode, reduce the

power consumption by stopping the timebase before enabling the STOP

instruction.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MC68HC908AP16CFB Datasheet(PDF) 209 Page - Motorola, Inc