s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 88

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

System Integration Module (SIM)
7.7.2 SIM Reset Status Register
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
88
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
Address:
Read:
Write:
POR:
$FE01
POR
Bit 7
1
Figure 7-18. SIM Reset Status Register (SRSR)
= Unimplemented
PIN
6
0
MC68HC908AZ32A Data Sheet, Rev. 2
COP
5
0
ILOP
4
0
ILAD
3
0
2
0
0
LVI
1
0
Freescale Semiconductor
Bit 0
0
0