AT89C51RC2-3CSCM(2003) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C51RC2-3CSCM
(Rev.:2003)

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

AT89C51RB2/RC2

Table 44. IENO Register

IEN0 - Interrupt Enable Register (A8h)

7

6

5

4

EA

EC

ET2

ES

3

2

1

0

ET1

EX1

ET0

EX0

Bit

Number

7

Bit

Mnemonic Description

Enable All Interrupt Bit

EA Cleared to disable all interrupts.

Set to enable all interrupts.

PCA Interrupt Enable Bit

6

EC Cleared to disable.

Set to enable.

Timer 2 Overflow Interrupt Enable Bit

5

ET2 Cleared to disable timer 2 overflow interrupt.

Set to enable timer 2 overflow interrupt.

Serial Port Enable Bit

4

ES Cleared to disable serial port interrupt.

Set to enable serial port interrupt.

Timer 1 Overflow Interrupt Enable Bit

3

ET1 Cleared to disable timer 1 overflow interrupt.

Set to enable timer 1 overflow interrupt.

External Interrupt 1 Enable Bit

2

EX1 Cleared to disable external interrupt 1.

Set to enable external interrupt 1.

Timer 0 Overflow Interrupt Enable Bit

1

ET0 Cleared to disable timer 0 overflow interrupt.

Set to enable timer 0 overflow interrupt.

External Interrupt 0 Enable Bit

0

EX0 Cleared to disable external interrupt 0.

Set to enable external interrupt 0.

Reset Value = 0000 0000b

Bit addressable

55

4180B–8051–04/03

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