MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 61

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Reset Status
Register
5-ri24_e
MOTOROLA
NOTE:
Address:
This read-only register contains six flags that show the source of the last
reset. Clear the reset status register by reading it. A power-on reset sets
the POR bit and clears all other bits in the register.
A reset source that becomes active before recovery from a previous
reset can prevent the previous reset from setting its reset status 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
LVI — Low-Voltage Inhibit Reset Bit
Read:
Write:
POR:
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = Last reset caused by power-on
0 = Read of RSR
1 = Last reset caused by external reset pin (RST)
0 = POR or read of RSR
1 = Last reset caused by timeout of COP counter
0 = POR or read of RSR
1 = Last reset caused by an illegal opcode
0 = POR or read of RSR
1 = Last reset caused by an opcode fetch from an illegal address
0 = POR or read of RSR
1 = Last reset caused by low power supply voltage
0 = POR or read of RSR
$FE01
POR
Bit 7
1
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Figure 3. Reset Status Register (RSR)
Resets and Interrupts
= Unimplemented
PIN
6
0
COP
5
0
ILOP
4
0
ILAD
3
0
2
0
0
Resets and Interrupts
MC68HC708XL36
LVI
1
0
Resets
Bit 0
0
0
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