SN8F27E64LKB datasheet(78/192 Pages) SONIX

78 / 192 page

SN8F27E60 Series

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

SONiX TECHNOLOGY CO., LTD

Page 78

Version 1.4

6.15 MULTI-INTERRUPT OPERATION

Under certain condition, the software designer uses more than one interrupt requests. Processing multi-interrupt

request requires setting the priority of the interrupt requests. The IRQ flags of interrupts are controlled by the interrupt

event. Nevertheless, the IRQ flag

“1” doesn’t mean the system will execute the interrupt vector. In addition, which

means the IRQ flags can be set

“1” by the events without enable the interrupt. Once the event occurs, the IRQ will be

logic

“1”. The IRQ and its trigger event relationship is as the below table.

Interrupt Name

Trigger Event Description

WAKEIRQ

Wake-up from power down or green mode

P00IRQ

P0.0 trigger controlled by PEDGE

P01IRQ

P0.1 trigger controlled by PEDGE

T0IRQ

T0C overflow

TC0IRQ

TC0C overflow

TC1IRQ

TC1C overflow

TC2IRQ

TC2C overflow

T1IRQ

T1CH, T1CL overflow

ADCIRQ

ADC converting end.

SIOIRQ

SIO transmitter successfully.

MSPIRQ

MSP transmitter successfully.

RXIRQ

UART transmit successfully.

TXIRQ

UART receive successfully.

For multi-interrupt conditions, two things need to be taking care of. One is that it is multi-vector and each of interrupts

points to unique vector. Two is users have to define the interrupt vector. The following example shows the way to

define the interrupt vector in the program memory.



Example: Check the interrupt request under multi-interrupt operation

ORG

; Interrupt vector

JMP

ISR_WAKE

JMP

ISR_INT0

JMP

ISR_INT1

JMP

ISR_T0

JMP

ISR_TC0

JMP

ISR_TC1

JMP

ISR_TC2

JMP

ISR_T1

JMP

ISR_ADC

JMP

ISR_SIO

JMP

ISR_MSP

JMP

ISR_UART_RX

JMP

ISR_UART_TX

ISR_WAKE:

; WAKE-UP interrupt service routine

RETI

; Exit interrupt vector

ISR_INT0:

; INT0 interrupt service routine

;

RETI

; Exit interrupt vector

ISR_INT1:

; INT1 interrupt service routine

RETI

; Exit interrupt vector

…

ISR_UART_TX:

; UART_TX interrupt service routine

RETI

; Exit interrupt vector

SN8F27E64LKB Datasheet(PDF) 78 Page - SONiX Technology Company

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