AT87C5103-ICSIL datasheet(46/64 Pages) ATMEL

Il numero della parte	AT87C5103-ICSIL

Spiegazioni elettronici	Low-pin Count 8-bit Microcontroller

PDF	64 Pages

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Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

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46 / 64 page

AT8xC5103

4134C–8051–09/04

Interrupt System

The AT8xC5103 has a total of 5 interrupt vectors: one external interrupt INT0, two timer

interrupts (timers 0, 1), PCA and SPI. These interrupts are shown in Figure 27..

Figure 27. Interrupt Control System

Each of the interrupt sources can be individually enabled or disabled by setting or clear-

ing a bit in the Interrupt Enable register (see Table 31). This register also contains a

global disable bit, which must be cleared to disable all interrupts at once.

Each interrupt source can also be individually programmed to one of four priority levels

by setting or clearing a bit in the Interrupt Priority register (see Table 33) and in the Inter-

rupt Priority High register (see Table 35). Table 30 shows the bit values and priority

levels associated with each combination.

IE1

High Priority

Interrupt

Polling

Sequence

Low Priority

Interrupt

Global

Disable

Individual

Enable

TF0

INT0

INT1

TF1

IPH, IP

IE0

SPI

CCFx

PCA

AT87C5103-ICSIL Scheda tecnica(PDF) 46 Page - ATMEL Corporation