T89C51RD2-3CSCM 查看數據表（PDF） - Atmel Corporation

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T89C51RD2-3CSCM

0 to 40MHz Flash Programmable 8-bit Microcontroller

Atmel Corporation 

Table 24. IP Register

IP - Interrupt Priority Register (B8h)

7

6

5

4

-

PPC

PT2

PS

3

2

1

0

PT1

PX1

PT0

PX0

Bit

Bit

Number 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.

Reset Value = X000 0000b

Bit addressable

40 T89C51RD2

4243G–8051–05/03

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