MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 95

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

6.8.1 SIM Reset Status Register
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
MOTOROLA
Address:
This register contains five bits 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 and clears all other bits in the register.
POR — Power-On Reset Bit
COP — Computer Operating Properly Reset Bit
ILOP — Illegal Opcode Reset Bit
ILAD — Illegal Address Reset Bit (opcode fetches only)
MENRST — Forced Monitor Mode Entry Reset Bit
LVI — Low-Voltage Inhibit Reset Bit
Read:
Write:
POR:
1 = Last reset caused by POR circuit
0 = 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 MENRST circuit
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 6-16. SIM Reset Status Register (SRSR)
System Integration Module (SIM)
= Unimplemented
6
0
0
COP
5
0
ILOP
4
0
ILAD
3
0
System Integration Module (SIM)
MENRST
2
0
LVI
1
0
Technical Data
SIM Registers
Bit 0
0
0
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