参数资料
型号: M34506M2-XXXFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDSO20
封装: 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件页数: 113/114页
文件大小: 836K
代理商: M34506M2-XXXFP
4
4-9
EIT
32180 Group User’s Manual (Rev.1.0)
4.6 Saving and Restoring the PC and PSW
PSW
BPC
PC
When EIT is accepted
When RTE instruction
is executed
[1] Saving the SM, IE and C bits
BSM
BIE
BC
SM
IE
C
[2] Updating the SM, IE and C bits
SM
IE
C
Unchanged or 0
0
[3] Saving the PC
BPC
PC
[4] Setting the vector address in the PC
PC
Vector address
[B] Restoring the PC from the BPC register
The value stored in the BPC register
after executing the RTE instruction is
undefined.
[A] Restoring the SM, IE and C bits from the
backup field
SM
IE
C
The values stored in the BSM, BIE
and BC bits after executing the RTE
instruction are undefined.
BSM
BIE
BC
[1]
[A]
[B]
[2]
[3]
[4]
Figure 4.6.1 Saving and Restoring the PC and PSW
16 17
23 24 25
31(LSB)
15
8
7
0(MSB)
SM
IE
C
BC
BSM
BIE
0
PSW
BPSW field
PSW field
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