MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 133
MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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7.8.2 SIM Reset Status Register
68HC908AZ32A — Rev 0.0
MOTOROLA
;
;
;
;
This code works if the H register has been pushed onto the stack in the break
service routine software. This code should be executed at the end of the
break service routine software.
HIBYTE
LOBYTE
DOLO
RETURN
EQU
EQU
If not BW, do RTI
TST
BNE
DEC
DEC
PULH
RTI
Address:
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
Read:
Write:
POR:
Freescale Semiconductor, Inc.
5
6
LOBYTE,SP
DOLO
HIBYTE,SP
LOBYTE,SP
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
$FE01
POR
Bit 7
1
Figure 7-18. SIM Reset Status Register (SRSR)
System Integration Module (SIM)
Go to: www.freescale.com
= Unimplemented
PIN
6
0
; If RETURNLO is not zero,
; then just decrement low byte.
; Else deal with high byte, too.
; Point to WAIT/STOP opcode.
; Restore H register.
COP
5
0
ILOP
4
0
ILAD
3
0
System Integration Module (SIM)
2
0
0
Advance Information
LVI
1
0
SIM Registers
Bit 0
0
0
133
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