AT89LP51RB2 datasheet(64/254 Pages) ATMEL

64 / 254 page

3722A–MICRO–10/11

AT89LP51RB2/RC2/IC2 Preliminary

Table 9-5.

IPL0 – Interrupt Priority Low Register 0

IPL0 = B8H

Reset Value = 0000 0000B

Bit Addressable

IP0DIS

PPCL

PT2L

PSL

PT1L

PX1L

PT0L

PX0L

Bit

543

Symbol

Function

IP0DIS

Interrupt Level 0 Disable

Clear to enable all interrupts with priority level 0. Set to disable all interrupts with priority level 0.

PPCL

PCA Interrupt Priority Low

Low order bit for PCA interrupt priority level.

PT2L

Timer 2 Interrupt Priority Low

Low order bit for Timer 2 interrupt priority level.

PSL

Serial Port Interrupt Priority Low

Low order bit for UART interrupt priority level.

PT1L

Timer 1 Interrupt Priority Low

Low order bit for Timer 1 interrupt priority level.

PX1L

External Interrupt 1 Priority Low

Low order bit for INT1 interrupt priority level.

PT0L

Timer 0 Interrupt Priority Low

Low order bit for Timer 0 interrupt priority level.

PX0L

External Interrupt 0 Priority Low

Low order bit for INT0 interrupt priority level.

Table 9-6.

IPL1 – Interrupt Priority Low Register 1

IPL1 = B2H

Reset Value = 0000 0000B

Bit Addressable

IP2DIS

–

PADCL

PCMPL

–

PSPL

PTWL

PKBL

Bit

543

Symbol

Function

IP2DIS

Interrupt Level 2 Disable

Clear to enable all interrupts with priority level 2. Set to disable all interrupts with priority level 2.

PADCL

ADC Interrupt Priority Low

Low order bit for ADC interrupt priority level.

PCMPL

Analog Comparator Interrupt Priority Low

Low order bit for Analog Comparator interrupt priority level.

PSPL

SPI Interrupt Priority Low

Low order bit for SPI interrupt priority level.

PTWL

TWI Interrupt Priority Low

Low order bit for TWI interrupt priority level.

PKBL

Keyboard Interrupt Priority Low

Low order bit for Keyboard interrupt priority level.

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