W78L801 Datasheet, PDF (6/20 Pages) Winbond – 8-BIT MICROCONTROLLER

W78L801
1 interrupts. Each flag in IRQ register will be set when an interrupt request is recognized but must be
cleared by software. Note that the interrupt flags have to be cleared before the interrupt service
routine is completed, or else another interrupt will be generated.
Interrupt Enable Register 0
Bit:
7
6
5
EA
-
-
Mnemonic: IE
4
3
2
1
0
-
ET1 EX1 ET0 EX0
Address: A8H
EA : Global enable. Enable/disable all interrupts.
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
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
Note: 0 = interrupt disabled, 1 = interrupt enabled.
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.
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