MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 146

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

System Integration Module (SIM)
9.8.2 Reset Status Register
Advance Information
146
NOTE:
Address:
This read-only register contains flags to show reset sources. A power-on
reset sets the POR flag and clears all other flags. Reset sources other
than power-on reset do not clear all other flags.
Reading the reset status register clears all reset flags. Reset service can
read the reset status register to clear the register after power-on reset
and to determine the source of any subsequent reset.
Only a read of the reset status register clears all reset flags. After
multiple resets from different sources without reading the register,
multiple flags remain set.
POR — Power-On Reset Flag
PIN — External Reset Flag
COP — COP Reset Flag
ILOP — Illegal Opcode Reset Flag
Reset:
Read:
Write:
1 = Power-on reset since last read of RSR
0 = Read of RSR since last power-on reset
1 = External reset since last read of RSR
0 = Power-on reset or read of RSR since last external reset
1 = COP reset since last read of RSR
0 = Power-on reset or read of RSR since last COP reset
1 = Illegal opcode reset since last read of RSR
0 = Power-on reset or read of RSR since last illegal opcode reset
$FE01
POR
Bit 7
R
R
1
Figure 9-18. SIM Reset Status Register (SRSR)
System Integration Module (SIM)
= Reserved
PIN
R
X
6
COP
R
5
0
X = Indeterminate
ILOP
R
4
0
ILAD
R
3
0
MC68HC708AS48
R
2
0
0
LVI
R
1
X
MOTOROLA
—
Rev. 4.0
Bit 0
R
0
0