M37544 RENESAS [Renesas Technology Corp], M37544 Datasheet - Page 10

• Manufacturer Part Number: M37544
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
• Manufacturer: RENESAS [Renesas Technology Corp]

Rev.1.04
REJ03B0012-0104Z
7544 Group
Fig. 10 Register push and pop at interrupt generation and subroutine call
Table 3 Push and pop instructions of accumulator or processor status register
Accumulator
Processor status register
Store Return Address
on Stack
Restore Return
Address
2004.06.08
Note : The condition to enable the interrupt
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M (S)
M (S)
(PC
(PC
Execute RTS
Subroutine
(S)
(S)
(S)
(S)
Interrupt request
L
H
)
) M (S)
(PC
(S – 1)
(S – 1)
(S + 1)
(S + 1)
(PC
M (S)
H
L
(Note)
)
)
Push instruction to stack
On-going Routine
Execute JSR
PHA
PHP
Interrupt enable bit is “1”
Interrupt disable flag is “0”
Service Routine
(PC
M (S)
M (S)
(PC
M (S)
(PS)
Execute RTI
(S)
(S)
(S)
(S)
(S)
(S)
Interrupt
H
L
)
) M (S)
(S + 1)
(S + 1)
(S + 1)
(S – 1)
(S – 1)
(S – 1)
(PC
(PC
(PS)
M (S)
M (S)
H
L
)
)
Pop instruction from stack
Store Return Address
on Stack
Store Contents of Processor
Status Register on Stack
Restore Contents of
Processor Status Register
Restore Return
Address
I Flag “0” to “1”
Fetch the Jump Vector
PLA
PLP