tmp86c408idmg TOSHIBA Semiconductor CORPORATION, tmp86c408idmg Datasheet - Page 49

• Manufacturer Part Number: tmp86c408idmg
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Example :Save/restore register using PUSH and POP instructions
Example :Save/restore register using data transfer instructions
3.4.2.1
3.4.2.2
SP
At acceptance of
an interrupt
PINTxx:
PINTxx:
Figure 3-3 Save/restore register using PUSH and POP instructions
can be saved/restored using the PUSH/POP instructions.
Using PUSH and POP instructions
Using data transfer instructions
If only a specific register is saved or interrupts of the same source are nested, general-purpose registers
To save only a specific register without nested interrupts, data transfer instructions are available.
PSW
PCH
PCL
PUSH
(interrupt processing)
POP
RETI
LD
(interrupt processing)
LD
RETI
SP
At execution of
PUSH instruction
WA
WA
(GSAVA), A
A, (GSAVA)
PSW
PCH
PCL
W
A
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SP
At execution of
POP instruction
; Save WA register
; Restore WA register
; Restore A register
; RETURN
; Save A register
; RETURN
PSW
PCL
PCH
SP
At execution of
RETI instruction
TMP86C408IDMG
Address
(Example)
b-5
b-4
b-3
b-2
b-1
b