P89C51RC datasheet(19/50 Pages) PHILIPS

номер детали	P89C51RC

подробное описание детали	80C51 Central Processing Unit

PDF	50 Pages

Scroll/Zoom	100%

производитель	PHILIPS [NXP Semiconductors]

домашняя страница	http://www.nxp.com

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19 / 50 page

Philips Semiconductors

Product specification

P89C51RC+/P89C51RD+

80C51 8-bit Flash microcontroller family

32K/64K ISP FLASH with 512–1K RAM

1999 Oct 27

PX0

IP (0B8H)

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

PPC

PCA interrupt priority bit

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.

SU01038

PT0

PX1

PT1

PT2

PPC

—

Figure 11. IP Registers

PX0H

IPH (B7H)

Priority Bit = 1 assigns higher priority

Priority Bit = 0 assigns lower priority

BIT

SYMBOL

FUNCTION

IPH.7

—

Not implemented, reserved for future use.

IPH.6

PPCH

PCA interrupt priority bit

IPH.5

PT2H

Timer 2 interrupt priority bit high.

IPH.4

PSH

Serial Port interrupt priority bit high.

IPH.3

PT1H

Timer 1 interrupt priority bit high.

IPH.2

PX1H

External interrupt 1 priority bit high.

IPH.1

PT0H

Timer 0 interrupt priority bit high.

IPH.0

PX0H

External interrupt 0 priority bit high.

SU01039

PT0H

PX1H

PT1H

PSH

PT2H

PPCH

—

Figure 12. IPH Registers

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