參數(shù)資料
型號: MC68HC08KH12A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 60/178頁
文件大?。?/td> 925K
代理商: MC68HC08KH12A
System Integration Module (SIM)
MC68HC08KH12A Data Sheet, Rev. 1.1
60
Freescale Semiconductor
SBSW — SIM Break Stop/Wait
This status bit is useful in applications requiring a return to wait or stop mode after exiting from a break
interrupt. Clear SBSW by writing a logic zero to it. Reset clears SBSW.
1 = Stop mode or wait mode was exited by break interrupt
0 = Stop mode or wait mode was not exited by break interrupt
SBSW can be read within the break state SWI routine. The user can modify the return address on the
stack by subtracting one from it. The following code is an example of this. Writing zero to the SBSW bit
clears it.
7.7.2 Reset Status Register (RSR)
This register contains six flags that show the source of the last reset. 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
1 = Last reset caused by POR circuit
0 = Read of RSR
PIN — External Reset Bit
1 = Last reset caused by external reset pin (RST)
0 = POR or read of RSR
;
;
;
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
EQU
5
LOBYTE
EQU
6
;
If not SBSW, do RTI
BRCLR
SBSW,BSR, RETURN
;
;
See if wait mode or stop mode was exited
by break
TST
LOBYTE,SP
; If RETURNLO is not zero,
BNE
DOLO
; then just decrement low byte.
DEC
HIBYTE,SP
; Else deal with high byte, too.
DOLO
DEC
LOBYTE,SP
; Point to WAIT/STOP opcode.
RETURN
PULH
RTI
; Restore H register.
Address: $FE01
Bit 7
6
5
4
3
2
1
Bit 0
Read:
POR
PIN
COP
ILOP
ILAD
USB
0
0
Write:
POR:
1
0
0
0
0
0
0
0
= Unimplemented
Figure 7-21. Reset Status Register (RSR)
相關(guān)PDF資料
PDF描述
MC68HC08LT8 Microcontrollers
MC68HC08SR12 M68HC08 Microcontrollers
MC68HC11E0 HC11 Microcontrollers
MC68HC11K0 HCMOS Microcontroller Unit
MC68HC11KMNPEVS Microcontrollers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC08KL8B 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC08KL8FB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC08KX8 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Microcontrollers
MC68HC08LJ12 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Addendum to MC68HC908LJ12 Technical Data
MC68HC08LJ12CFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Addendum to MC68HC908LJ12 Technical Data