Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller PLCC 52 (19.2x19.2) 8-Bit 60 MHz I/O number 36

117

AT89C51AC3

4383D–8051–02/08

Table 67. IPL0 Register

IPL0 (S:B8h)

Interrupt Enable Register

Reset Value = X000 0000b

bit addressable

7 6 5 4 3 2 1 0

- PPC PT2 PS PT1 PX1 PT0 PX0

Bit

Number

Bit

Mnemonic Description

7 -

Reserved

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

6 PPC

PCA Interrupt Priority bit

Refer to PPCH for priority level

5 PT2

Timer 2 Overflow Interrupt Priority bit

Refer to PT2H for priority level.

4 PS

Serial Port Priority bit

Refer to PSH for priority level.

3 PT1

Timer 1 Overflow Interrupt Priority bit

Refer to PT1H for priority level.

2 PX1

External Interrupt 1 Priority bit

Refer to PX1H for priority level.

1 PT0

Timer 0 Overflow Interrupt Priority bit

Refer to PT0H for priority level.

0 PX0

External Interrupt 0 Priority bit

Refer to PX0H for priority level.