mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 153

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9.8.2 SIM Reset Status Register
MC68HC908AS60 — Rev. 1.0
Address:
This register contains six flags that show the source of the last reset. The
status register will automatically clear after reading it. A power-on reset
sets the POR bit and clears all other bits in the register.
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
Read:
Write:
POR:
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1 = Last reset caused by POR circuit
0 = Read of SRSR
1 = Last reset caused by external reset pin (RST)
0 = POR or read of SRSR
1 = Last reset caused by COP counter
0 = POR or read of SRSR
1 = Last reset caused by an illegal opcode
0 = POR or read of SRSR
1 = Last reset caused by an opcode fetch from an illegal address
0 = POR or read of SRSR
1 = Last reset was caused by the LVI circuit
0 = POR or read of SRSR
$FE01
POR
Bit 7
1
Figure 9-18. SIM Reset Status Register (SRSR)
System Integration Module (SIM)
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= Unimplemented
PIN
6
0
COP
5
0
ILOP
4
0
ILAD
3
0
System Integration Module (SIM)
2
0
0
LVI
1
0
Technical Data
SIM Registers
Bit 0
0
0