AT83C51RB2-3CSCM 查看數據表（PDF） - Atmel Corporation

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AT83C51RB2-3CSCM

80C51 High Performance ROM 8-bit Microcontroller

Atmel Corporation 

AT80C51RD2/AT83C51Rx2

Table 34. IPL0 Register

IPL0 - Interrupt Priority Register (B8h)

7

6

5

4

-

PPCL

PT2L

PSL

3

PT1L

2

PX1L

1

PT0L

Bit

Number

7

6

5

4

3

2

1

0

Bit

Mnemonic Description

-

Reserved

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

PPCL

PCA interrupt priority bit

Refer to PPCH for priority level.

PT2L

Timer 2 overflow interrupt priority bit

Refer to PT2H for priority level.

PSL

Serial port priority bit

Refer to PSH for priority level.

PT1L

Timer 1 overflow interrupt priority bit

Refer to PT1H for priority level.

PX1L

External interrupt 1 priority bit

Refer to PX1H for priority level.

PT0L

Timer 0 overflow interrupt priority bit

Refer to PT0H for priority level.

PX0L

External interrupt 0 priority bit

Refer to PX0H for priority level.

Reset Value = X000 0000b

Bit addressable

0

PX0L

49

4113B–8051–03/05

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