P89C738 datasheet(18/64 Pages) PHILIPS

18 / 64 page

1998 Apr 07

Philips Semiconductors

Product speciﬁcation

8-bit Flash microcontrollers

P89C738; P89C739

9.1

Interrupt Enable Register (IE)

Table 5

Interrupt Enable Register (SFR address A8H)

Table 6

Description of IE bits

9.2

Interrupt Priority Register (IP)

Table 7

Interrupt Priority Register (SFR address B8H)

Table 8

Description of IP bits

76543210

−

ET2

ET1

EX1

ET0

EX0

BIT

SYMBOL

DESCRIPTION

7EA

General enable/disable control. If EA = 0, no interrupt is enabled. If EA = 1, any

individually enabled interrupt will be accepted.

−

reserved

ET2

enable Timer 2 interrupt

enable Serial Port interrupt

ET1

enable Timer 1 interrupt

EX1

enable external interrupt 1

ET0

enable Timer 0 interrupt

EX0

enable external interrupt 0

76543210

−−

PT2

PT1

PX1

PT0

PX0

BIT

SYMBOL

DESCRIPTION

−

reserved

−

reserved

PT2

Timer 2 interrupt priority level

Serial Port interrupt priority level

PT1

Timer 1 interrupt priority level

PX1

external interrupt 1 priority level

PT0

Timer 0 interrupt priority level

PX0

external interrupt 0 priority level

P89C738 Datasheet(PDF) 18 Page - NXP Semiconductors

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