MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 295

• Manufacturer Part Number: MC68HC908GR4
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

System Integration Module (SIM)
19.8.2 SIM Reset Status Register
Technical Data
295
DOLO
RETURN
DEC
DEC
PULH
RTI
HIBYTE,SP
LOBYTE,SP
Address:
This register contains six flags that show the source of the last reset
provided all previous reset status bits have been cleared. Clear the SIM
reset status register by 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
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
For More Information On This Product,
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
$FE01
POR
Bit 7
Figure 19-21. SIM Reset Status Register (SRSR)
1
System Integration Module (SIM)
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= Unimplemented
PIN
6
0
;Else deal with high byte, too.
;Point to WAIT/STOP opcode.
;Restore H register.
COP
5
0
ILOP
4
0
ILAD
3
0
MC68HC908GR8 — Rev 4.0
MODRST
2
0
LVI
1
0
MOTOROLA
Bit 0
0
0