SN8F27E64LKB datasheet(76/192 Pages) SONIX

76 / 192 page

SN8F27E60 Series

8-Bit Flash Micro-Controller with Embedded ICE and ISP

SONiX TECHNOLOGY CO., LTD

Page 76

Version 1.4

6.13 SIO INTERRUPT OPERATION

When the SIO converting successfully, the SIOIRQ will be set to

“1” no matter the SIOIEN is enable or disable. If the

SIOIEN and the trigger event SIOIRQ is set to be

“1”. As the result, the system will execute the interrupt vector. If the

SIOIEN = 0, the trigger event SIOIRQ is still set to be

“1”. Moreover, the system won’t execute interrupt vector even

when the SIOIEN is set to be

“1”. Users need to be cautious with the operation under multi-interrupt situation.



Example: SIO interrupt request setup.

B0BSET

FSIOIEN

; Enable SIO interrupt service

B0BCLR

FSIOIRQ

; Clear SIO interrupt request flag

B0BSET

FGIE

; Enable GIE



Example: SIO interrupt service routine.

ORG

11H

; Interrupt vector

JMP

INT_SERVICE

INT_SERVICE:

…

; Push routine to save ACC and PFLAG to buffers.

B0BTS1

FSIOIRQ

; Check SIOIRQ

JMP

EXIT_INT

; SIOIRQ = 0, exit interrupt vector

B0BCLR

FSIOIRQ

; Reset SIOIRQ

…

; SIO interrupt service routine

…

EXIT_INT:

…

; Pop routine to load ACC and PFLAG from buffers.

RETI

; Exit interrupt vector

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