MC68HC08AZ16 Datasheet, PDF (136/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Break Module
Low-power modes
Low-power modes
The WAIT and STOP instructions put the MCU in
low-power-consumption standby modes.
WAIT mode
If enabled, the break module and the DMA module are active in WAIT
mode. The SIM break STOP/WAIT bit (SBSW) in the SIM break status
register (see SIM registers on page 91) becomes set if a DMA-generated
address matches the break address registers in WAIT mode. The DMA
can also use the break status and control register as its destination
address in order to write to the BRKA and BRKE bits during WAIT mode.
The SBSW bit is set if the DMA writes to the break status and control
register. SBSW is for applications that require a return to WAIT mode
after exiting WAIT mode for a DMA-generated break interrupt. In the
break routine, the user can subtract one from the return address on the
stack if SBSW is set. The SBSW bit is cleared by writing a ‘0’ to it.
STOP mode
A break interrupt causes exit from STOP mode and sets the SBSW bit
in the SIM break status register. See SIM registers on page 91.
7-brk
MOTOROLA
Break Module
MC68HC08AZ32
135