T89C51RD2-DDWC-L View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

T89C51RD2-DDWC-L

0 to 40 MHz Flash Programmable 8-bit Microcontroller

Atmel Corporation 

T89C51RD2

IPH - Interrupt Priority High Register (B7h)

7

6

5

-

PPCH

PT2H

Table 20. IPH Register

4

3

PSH

PT1H

2

PX1H

Bit

Number

7

6

Bit

Mnemonic

Description

-

Reserved

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

PPCH

PCA interrupt priority bit high.

PPCHPPC Priority Level

00

Lowest

01

10

11

Highest

Timer 2 overflow interrupt Priority High bit

PT2HPT2 Priority Level

5

PT2H

00

01

Lowest

10

11

Highest

Serial port Priority High bit

PSHPS

Priority Level

4

PSH

00

01

Lowest

10

11

Highest

Timer 1 overflow interrupt Priority High bit

PT1HPT1 Priority Level

3

PT1H

00

01

Lowest

10

11

Highest

External interrupt 1 Priority High bit

PX1HPX1 Priority Level

2

PX1H

00

01

Lowest

10

11

Highest

Timer 0 overflow interrupt Priority High bit

PT0HPT0

Priority Level

1

PT0H

00

01

Lowest

10

11

Highest

External interrupt 0 Priority High bit

PX0HPX0

Priority Level

0

PX0H

00

01

Lowest

10

11

Highest

Reset Value = X000 0000b

Not bit addressable

1

PT0H

0

PX0H

40

Rev. F - 15 February, 2001

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