Datasheet

ManualsBrandsAtmel Manuals8051 Microcontrollers8051 CISC Low Power, High Performance CMOS Microcontroller 8bit 16KB PDIP

58

AT89C51RB2/RC2

4180D–8051–06/05

Table 45. IPL0 Register

IPL0 - Interrupt Priority Register (B8h)

Reset Value = X000 0000b

Bit addressable

76543210

- PPCL PT2L PSL PT1L PX1L PT0L PX0L

Bit

Number

Bit

Mnemonic Description

7-

Reserved

The value read from this bit is indeterminate. Do not set this bit.

6 PPCL

PCA Interrupt Priority Bit

see PPCH for priority level.

5PT2L

Timer 2 Overflow Interrupt Priority Bit

see PT2H for priority level.

4 PSL

Serial Port Priority Bit

see PSH for priority level.

3PT1L

Timer 1 Overflow Interrupt Priority Bit

see PT1H for priority level.

2 PX1L

External Interrupt 1 Priority Bit

see PX1H for priority level.

1PT0L

Timer 0 Overflow Interrupt Priority Bit

see PT0H for priority level.

0 PX0L

External Interrupt 0 Priority Bit

see PX0H for priority level.