mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 126

• Manufacturer Part Number: mc68hc908rf2
• Description: M68hc08 Microcontrollers Microcontroller / Transmitter
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
10.7 SIM Registers
10.7.1 SIM Break Status Register
Data Sheet
126
CGMXCLK
INT/BREAK
IAB
Figure 10-16. Stop Mode Recovery from Interrupt or Break
The SIM has three memory mapped registers:
The SIM break status register (SBSR) contains a flag to indicate that a break
caused an exit from stop or wait mode.
SBSW — SIM Break Stop/Wait Bit
•
•
•
Address:
SBSW can be read within the break state SWI routine. The user can modify the
return address on the stack by subtracting one from it. Writing 0 to the SBSW
bit clears it.
Reset:
Read:
Write:
1 = Wait mode was exited by break interrupt.
0 = Wait mode was not exited by break interrupt.
SIM break status register, SBSR
SIM reset status register, SRSR
SIM break flag control register, SBFCR
Freescale Semiconductor, Inc.
STOP +1
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Bit 7
R
R
Figure 10-17. SIM Break Status Register (SBSR)
System Integration Module (SIM)
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= Reserved
R
6
STOP + 2
STOP RECOVERY PERIOD
R
5
STOP + 2
R
4
SP
Note: Writing a 0 clears SBSW.
R
3
SP – 1
MC68HC908RF2 — Rev. 4.0
R
2
SP – 2
See Note
SBSW
1
0
SP – 3
MOTOROLA
Bit 0
R