Freescale Semiconductor, Inc.
Break Module
12.4.4 COP During Break Interrupts
The COP is disabled during a break interrupt when VHI is present on the
RST pin.
12.5 Low-Power Modes
The WAIT and STOP instructions put the MCU in low power-
consumption standby modes.
12.5.1 Wait Mode
If enabled, the break module is active in wait mode. The SIM break
stop/wait bit (SBSW) in the SIM break status register indicates whether
wait was exited by a break interrupt. If so, the user can modify the return
address on the stack by subtracting one from it. (See 9.8.1 SIM Break
Status Register.)
12.5.2 Stop Mode
The break module is inactive in stop mode. The STOP instruction does
not affect break module register states. A break interrupt will cause an
exit from stop mode and sets the SBSW bit in the SIM break status
register.
12.6 Break Module Registers
These registers control and monitor operation of the break module:
• Break address register high, BRKH
• Break address register low, BRKL
• Break status and control register, BSCR
Technical Data
MC68HC908AS60 — Rev. 1.0
Break Module
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