80C32EBAA datasheet(47/62 Pages) PHILIPS

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Philips Semiconductors

Product specification

80C52/80C54/80C58

CMOS single-chip 8-bit microcontrollers

1996 Aug 16

EX0

IE0 (A8H)

Enable Bit = 1 enables the interrupt.

Enable Bit = 0 disables it.

BIT

SYMBOL

FUNCTION

IE.7

Global disable bit. If EA = 0, all interrupts are disabled. If EA = 1, each interrupt can be individually

enabled or disabled by setting or clearing its enable bit.

IE.6

—

IE.5

ET2

Timer 2 interrupt enable bit.

IE.4

Serial Port interrupt enable bit.

IE.3

ET1

Timer 1 interrupt enable bit.

IE.2

EX1

External interrupt 1 enable bit.

IE.1

ET0

Timer 0 interrupt enable bit.

IE.0

EX0

External interrupt 0 enable bit.

SU00743

ET0

EX1

ET1

ET2

—

Figure 10. IE Registers

PX0

IP0 (B8H)

Priority Bit = 1 assigns high priority

Priority Bit = 0 assigns low priority

BIT

SYMBOL

FUNCTION

IP.7

—

Not implemented, reserved for future use.

IP.6

—

IP.5

PT2

Timer 2 interrupt priority bit.

IP.4

Serial Port interrupt priority bit.

IP.3

PT1

Timer 1 interrupt priority bit.

IP.2

PX1

External interrupt 1 priority bit.

IP.1

PT0

Timer 0 interrupt priority bit.

IP.0

PX0

External interrupt 0 priority bit.

SU00744

PT0

PX1

PT1

PT2

—

Figure 11. IP Registers

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