參數(shù)資料
型號: M32000D3FP
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 66.6 MHz, RISC MICROCONTROLLER, PQFP100
封裝: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù): 95/155頁
文件大?。?/td> 1340K
代理商: M32000D3FP
4-8
M32000D3FP User's Manual
EIT
4.6 Save and return of PC and PSW
Operation is as follows when the EIT event occurs and when the RTE instruction is executed.
(1) Hardware pre-processing when the EIT event occurs
SM, IE and C bits saving
The SM, IE and C bits are saved in the PSW register.
BSM
← SM
BIE
← IE
BC
← C
SM, IE and C bits updating
The SM, IE and C bits are updated in the PSW register.
SM
← not changed (RIE, AE, TRAP),
or cleared to "0" (SBI, EI, RI)
IE
← cleared to "0"
C
← cleared to "0"
PC saving
The PC is saved.
BPC
← PC
Vector address setting
Vector address is set in the PC.
Processing switches to the EIT handler, after branching to the EIT vector and executing the branch
instruction (BRA instruction) stored there.
(2) Hardware post-processing when the RTE instruction is executed
BSM, BIE and BC bits restoring
The BSM, BIE and BC bits are returned from the PSW register.
SM
← BSM
IE
← BIE
C
← BC
BPC value restoring
The BPC value is returned from the BPC.
PC
← BPC
Note: After executing the RTE instruction, the values of the BSM, BIE and BC bits in the BPC and the PSW
register are undefined.
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