80CL31 Datasheet, PDF(20/40 Page) NXP Semiconductors – Low-voltage single-chip 8-bit microcontrollers

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80CL31 Datasheet, PDF (20/40 Pages) NXP Semiconductors – Low-voltage single-chip 8-bit microcontrollers

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Philips Semiconductors

Low-voltage single-chip 8-bit microcontrollers

Product specification

80CL31/80CL51

P1.7

P1.6

P1.5

P1.4

P1.3

P1.2

P1.1

P1.0

IX1

IEN1

IRQ1

WAKE-UP

Figure 12. External Interrupt Configuration

Interrupt enable register IEN0, IEN1

IEN0 (A8H)

ES1

ES0

ET1

EX1

ET0

EX0

Bit Symbol

Function

IEN0.7 EA General enable/disable control

0 = no interrupt is enabled

1 = any individually enabled interrupt will be accepted

IEN0.6 - Unused

IEN0.5 ES1 Unused

IEN0.4 ES0 Enable UART SIO interrupt

IEN0.3 ET1 Enable timer T1 interrupt

IEN0.2 EX1 Enable external interrupt

IEN0.1 ET0 Enable Timer T0 interrupt

IEN0.0 EX0 Enable external interrupt 0

IEN1 (E8H)

EX9

EX8

EX7

EX6

EX5

EX4

EX3

EX2

Bit Symbol

Function

IEN1.7 EX9 Enable external interrupt 9

IEN1.6 EX8 Enable external interrupt 8

IEN1.5 EX7 Enable external interrupt 7

IEN1.4 EX6 Enable external interrupt 6

IEN1.3 EX5 Enable external interrupt 5

IEN1.2 EX4 Enable external interrupt 4

IEN1.1 EX3 Enable external interrupt 3

IEN1.0 EX2 Enable external interrupt 2

where 0 = interrupt disabled

1 = interrupt enabled

Interrupt priority register IP0, IP1

IP0 (B8H)

PS1

PS0

PT1

PX1

PT0

PX0

Bit Symbol

Function

IP0.7 - Unused

IP0.6 - Unused

IP0.5 PS1 Unused

IP0.4 PS0 UART SIO interrupt

IP0.3 PT1 Timer 1 interrupt priority level

IP0.2 PX1 External interrupt 1 priority level

IP0.1 PT0 Timer 0 interrupt priority level

IP0.0 PX0 External interrupt 0 priority level

IP1 (B8H)

PX9

PX8

PX7

PX6

PX5

PX4

PX3

PX2

Bit Symbol

Function

IP1.7 PX9 External interrupt 9 priority level

IP1.6 PX8 External interrupt 8 priority level

IP1.5 PX7 External interrupt 7 priority level

IP1.4 PX6 External interrupt 6 priority level

IP1.3 PX5 External interrupt 5 priority level

IP1.2 PX4 External interrupt 4 priority level

IP1.1 PX3 External interrupt 3 priority level

IP1.0 PX2 External interrupt 2 priority level

Interrupt priority is as follows:

0 = low priority

1 = high priority

January 1995

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