UPD17062 datasheet(121/298 Pages) RENESAS

121 / 298 page

119

µPD17062

Example Saving the status in an interrupt processing routine

M046

M047

M048

M04D

M04E

M05F

BTM0CK

MEM

0.46H

0.47H

0.48H

0.4DH

0.4EH

0.5FH

0.89H

# POKE

$ PEEK

% POKE

& MOV

( ST

) ST

M048,

WR,

M04E,

RPL,

M046,

M047,

RPL

#0EH

AR1

AR0

* PEEK

+ ST

WR,

M05F,

BTM0CK

BANK0

MOV

RPL,

AR1,

AR0,

#0EH

M046

M047

POKE

WR,

BTM0CK,

M05F

PEEK

POKE

PEEK

WR,

RPL,

WR,

M04E

M048

RETI

Main routine

Program example

Interrupt

processing

routine

(enters a DI state)

BANK and IXE

saving by

hardware

Saving contents

of required system

software

;

Restoration of

contents of saved

system registers

Interrupt reception

Interrupt

processing

Saves the contents of the window register in M048.

Saves the contents of the general-purpose register pointer in M04E.

Sets row address 7 of bank 0 in the general-purpose register

Saves the contents of required system registers.

Saves the contents of the required control register.

Restores the contents of the saved control register.

Restores the contents of the general register-purpose pointer.

Restores the contents of the saved window register.

The EI instruction permits an interrupt (INTE setting)

after the next RETI instruction is executed.

Restoration by the BANK or IXE hardware

;

Makes bank 0 available.

Sets row address 7 of bank 0 in the general-purpose register.

Restores the contents of the saved system registers.

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