mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 127

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

10.7.2 SIM Reset Status Register
MC68HC908RF2 — Rev. 4.0
MOTOROLA
This register contains six flags that show the source of the last reset. The status
register will clear automatically after reading it. A power-on reset sets the POR bit.
POR — Power-On Reset Bit
PIN — External Reset Bit
COP — Computer Operating Properly Reset Bit
ILOP — Illegal Opcode Reset Bit
ILAD — Illegal Address Reset Bit (opcode fetches only)
LVI — Low-Voltage Inhibit Reset Bit
Address:
Read:
Write:
POR:
1 = Last reset caused by POR circuit
0 = Read of SRSR
1 = Last reset caused by external reset pin (RST)
0 = Read of SRSR
1 = Last reset caused by COP counter
0 = Read of SRSR
1 = Last reset caused by an illegal opcode
0 = Read of SRSR
1 = Last reset caused by an opcode fetch from an illegal address
0 = Read of SRSR
1 = Last reset was caused by the LVI circuit
0 = Read of SRSR
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POR
Bit 7
1
Figure 10-18. SIM Reset Status Register (SRSR)
System Integration Module (SIM)
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= Unimplemented
PIN
X
6
COP
5
X
X = Indeterminate
ILOP
4
X
ILAD
X
3
System Integration Module (SIM)
X
2
0
LVI
X
1
SIM Registers
Data Sheet
Bit 0
X
0
127