SH79F166AFSLASH044FR datasheet(52/113 Pages) SINOWEALTH

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SH79F166A

7.9 Interrupt

7.9.1 Feature

 14 interrupt sources

 4 interrupt priority levels

The SH79F166A provides total 14 interrupt sources: 5 external interrupts (INT0/1/2/3/4; INT4 including INT40-43, which share

the same vector address), 4 timer interrupts (Timer2, 3, 4, 5), one EUART interrupt, ADC Interrupt, PWM interrupts, SCM

interrupt and LPD interrupt.

7.9.2 Interrupt Enable Control

Each interrupt source can be individually enabled or disabled by setting or clearing the corresponding bit in the interrupt enable

registers IEN0 or IEN1. The IEN0 register also contains global interrupt enable bit, EA, which can enable/disable all the

interrupts at once. Generally, after reset, all interrupt enable bits are set to 0, which means that all the interrupts are disabled.

Table 7.37 Primary Interrupt Enable Register

A8H

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

IEN0

EADC

ET2

ES0

EX1

ET5

EX0

R/W

Reset Value

(POR/WDT/LVR/PIN)

Bit Number

Bit Mnemonic

Description

All interrupt enable bit

0: Disable all interrupt

1: Enable all interrupt

EADC

ADC interrupt enable bit

0: Disable ADC interrupt

1: Enable ADC interrupt

ET2

Timer2 overflow interrupt enable bit

0: Disable Timer2 overflow interrupt

1: Enable Timer2 overflow interrupt

ES0

EUART interrupt enable bit

0: Disable EUART interrupt

1: Enable EUART interrupt

EX1

External interrupt1 enable bit

0: Disable external interrupt1

1: Enable external interrupt1

ET5

Timer5 overflow interrupt enable bit

0: Disable Timer5 overflow interrupt

1: Enable Timer5 overflow interrupt

EX0

External interrupt0 enable bit

0: Disable external interrupt0

1: Enable external interrupt0

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