s908qc16g0cdte Freescale Semiconductor, Inc, s908qc16g0cdte Datasheet - Page 135
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s908qc16g0cdte
Manufacturer Part Number
s908qc16g0cdte
Description
M68hc08 Family Of 8-bit Microcontroller Units Mcus
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.S908QC16G0CDTE.pdf
(176 pages)
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The break interrupt timing is:
By updating a break address and clearing the BRKA bit in a break interrupt routine, a break interrupt can
be generated continuously.
15.2.1.1 Flag Protection During Break Interrupts
The system integration module (SIM) controls whether or not module status bits can be cleared during
the break state. The BCFE bit in the break flag control register (BFCR) enables software to clear status
bits during the break state. See
for each module.
15.2.1.2 TIM During Break Interrupts
A break interrupt stops the timer counter.
15.2.1.3 COP During Break Interrupts
The COP is disabled during a break interrupt with monitor mode when BDCOP bit is set in break auxiliary
register (BRKAR).
Freescale Semiconductor
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When a break address is placed at the address of the instruction opcode, the instruction is not
executed until after completion of the break interrupt routine.
When a break address is placed at an address of an instruction operand, the instruction is executed
before the break interrupt.
When software writes a 1 to the BRKA bit, the break interrupt occurs just before the next instruction
is executed.
A break address should be placed at the address of the instruction opcode.
When software does not change the break address and clears the BRKA
bit in the first break interrupt routine, the next break interrupt will not be
generated after exiting the interrupt routine even when the internal address
bus matches the value written in the break address registers.
13.8.2 Break Flag Control Register
MC68HC08QY/QT Family Data Sheet, Rev. 2
CAUTION
and the Break Interrupts subsection
Break Module (BRK)
135
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