s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 115
s908az32ag2cfue
Manufacturer Part Number
s908az32ag2cfue
Description
M68hc08 Microcontrollers 8-bit Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.S908AZ32AG2CFUE.pdf
(324 pages)
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11.4.1 Wait Mode
If enabled, the break module is active in wait mode. The SIM break wait bit (BW) 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
11.4.2 Stop Mode
The break module is inactive in stop mode. The STOP instruction does not affect break module register
states.
11.5 Break Module Registers
These registers control and monitor operation of the break module:
11.5.1 Break Status and Control Register
The break status and control register contains break module enable and status bits.
BRKE — Break Enable Bit
BRKA — Break Active Bit
Freescale Semiconductor
•
•
•
This read/write bit enables breaks on break address register matches. Clear BRKE by writing a logic
0 to bit 7. Reset clears the BRKE bit.
This read/write status and control bit is set when a break address match occurs. Writing a logic 1 to
BRKA generates a break interrupt. Clear BRKA by writing a logic 0 to it before exiting the break routine.
Reset clears the BRKA bit.
1 = Breaks enabled on 16-bit address match
0 = Breaks disabled on 16-bit address match
1 = (When read) Break address match
0 = (When read) No break address match
Break address register high (BRKH)
Break address register low (BRKL)
Break status and control register (BSCR)
Address:
Reset:
Read:
Write:
Figure 11-3. Break Status and Control Register (BSCR)
$FE0B
BRKE
Bit 7
0
= Unimplemented
BRKA
6
0
MC68HC908AZ32A Data Sheet, Rev. 2
5
0
0
4
0
0
7.7.1 SIM Break Status
3
0
0
2
0
0
Register.
1
0
0
Break Module Registers
Bit 0
0
0
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