MC68HC08AZ16 Datasheet, PDF (119/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Clock Generator Module (CGM)
CGM during break interrupts
The system integration module (SIM) controls whether status bits in
other modules can be cleared during the break state. The BCFE bit in
the SIM break flag control register (SBFCR) enables software to clear
status bits during the break state. See System Integration Module (SIM)
on page 71.
To allow software to clear status bits during a break interrupt, a ‘1’ should
be written to the BCFE bit. If a status bit is cleared during the break state,
it remains cleared when the MCU exits the break state.
To protect the PLLF bit during the break state, write a ‘0’ to the BCFE bit.
With BCFE at ‘0’ (its default state), software can read and write the PLL
control register during the break state without affecting the PLLF bit.
MC68HC08AZ32
118
Clock Generator Module (CGM)
24-cgm
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