mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 88

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
6.7 SIM Registers
The SIM has three memory-mapped registers:
6.7.1 SIM Break Status Register
The SIM break status register (SBSR) contains a flag to indicate that a break caused an exit from stop
mode or wait mode.
SBSW — Break Wait Bit
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This status bit is set when a break interrupt causes an exit from wait mode or stop mode. Clear SBSW
by writing a logic 0 to it. Reset clears SBSW.
SBSW can be read within the break interrupt routine. The user can modify the return address on the
stack by subtracting 1 from it.
1 = Stop mode or wait mode was exited by break interrupt
0 = Stop mode or wait mode was not exited by break interrupt
SIM Break Status Register
SIM Reset Status Register
SIM Break Flag Control Register
Note: Writing a logic 0 clears SBSW.
Address:
Reset:
Read:
Write:
$FE00
Bit 7
R
Figure 6-20. SIM Break Status Register (SBSR)
R
6
(SBSR) — $FE00
(SRSR) — $FE01
MC68HC908JW32 Data Sheet, Rev. 5
(SBFCR) — $FE03
R
R
5
= Reserved
R
4
R
3
R
2
SBSW
Note
1
0
Freescale Semiconductor
Bit 0
R