參數(shù)資料
型號: TMP86CH09NG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, 1.78 MM PITCH, LEAD FREE, PLASTIC, SDIP-32
文件頁數(shù): 67/120頁
文件大?。?/td> 1743K
代理商: TMP86CH09NG
Page 39
TMP86FH09ANG
3.4.2.2 Using data transfer instructions
To save only a specific register without nested interrupts, data transfer instructions are available.
Figure 3-2 Saving/Restoring General-purpose Registers under Interrupt Processing
Example :Save/store register using PUSH and POP instructions
PINTxx:
PUSH
WA
; Save WA register
(interrupt processing)
POP
WA
; Restore WA register
RETI
; RETURN
Example :Save/store register using data transfer instructions
PINTxx:
LD
(GSAVA), A
; Save A register
(interrupt processing)
LD
A, (GSAVA)
; Restore A register
RETI
; RETURN
PCL
PCH
PSW
At acceptance of
an interrupt
At execution of
PUSH instruction
At execution of
RETI instruction
At execution of
POP instruction
b-4
b-3
b-2
b-1
b
PCL
PCH
PSW
PCL
PCH
PSW
SP
Address
(Example)
SP
A
W
b-5
Interrupt
acceptance
Interrupt
service task
Restoring
registers
Saving
registers
Interrupt return
Saving/Restoring general-purpose registers using PUSH/POP data transfer instruction
Main task
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