AT89S52-24AC Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

AT89S52-24AC

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Table 13-1. Interrupt Enable (IE) Register

(MSB)

(LSB)

EA

–

ET2

ES

ET1

EX1

ET0

EX0

Enable Bit = 1 enables the interrupt.

Enable Bit = 0 disables the interrupt.

Symbol

Position

Function

EA

IE.7

Disables all interrupts. If EA = 0, no interrupt is acknowledged. If EA = 1, each

interrupt source is individually enabled or disabled by setting or clearing its enable bit.

–

IE.6

Reserved.

ET2

IE.5

Timer 2 interrupt enable bit.

ES

IE.4

Serial Port interrupt enable bit.

ET1

IE.3

Timer 1 interrupt enable bit.

EX1

IE.2

External interrupt 1 enable bit.

ET0

IE.1

Timer 0 interrupt enable bit.

EX0

IE.0

External interrupt 0 enable bit.

User software should never write 1s to reserved bits, because they may be used in future AT89 products.

Figure 13-1. Interrupt Sources

0

INT0

IE0

1

TF0

0

INT1

IE1

1

TF1

TI

RI

TF2

EXF2

18 AT89S52

1919C–MICRO–3/05

Share Link: