W78LE812

Publication Release Date: February 1999

- 7 -

Revision A2

Interrupt Enable Register 0

Bit:

7

6

5

4

3

2

1

0

EA

-

ET2

ES

ET1

EX1

ET0

EX0

Mnemonic: IE

Address: A8H

EA : Global enable. Enable/disable all interrupts.

ET2: Enable Timer 2 interrupt.

ES : Enable Serial Port interrupt.

ET1: Enable Timer 1 interrupt

EX1: Enable external interrupt 1

ET0: Enable Timer 0 interrupt

EX0: Enable external interrupt 0

Interrupt Enable Register 1

Bit:

7

6

5

4

3

2

1

0

EX9

EX8

EX7

EX6

EX5

EX4

EX3

EX2

Mnemonic: IE1

Address: E8H

EX9: Enable external interrupt 9

Note: 0 = interrupt disabled, 1 = interrupt enabled.

EX8: Enable external interrupt 8

EX7: Enable external interrupt 7

EX6: Enable external interrupt 6

EX5: Enable external interrupt 5

EX4: Enable external interrupt 4

EX3: Enable external interrupt 3

EX2: Enable external interrupt 2

Interrupt Priority Register 0

Bit:

7

6

5

4

3

2

1

0

-

PS1

PT2

PS

PT1

PX1

PT0

PX0

Mnemonic: IP0

Address: B8h

IP.7: Unused.

PS1: This bit defines the Serial port 1 interrupt priority. PS = 1 sets it to higher priority level.

PT2: This bit defines the Timer 2 interrupt priority. PT2 = 1 sets it to higher priority level.

PS : This bit defines the Serial port 0 interrupt priority. PS = 1 sets it to higher priority level.

PT1: This bit defines the Timer 1 interrupt priority. PT1 = 1 sets it to higher priority level.

PX1: This bit defines the External interrupt 1 priority. PX1 = 1 sets it to higher priority level.

PT0: This bit defines the Timer 0 interrupt priority. PT0 = 1 sets it to higher priority level.

PX0: This bit defines the External interrupt 0 priority. PX0 = 1 sets it to higher priority level.