P89V52X2FN datasheet(6/57 Pages) NXP

6 / 57 page

P89V52X2_3

Product data sheet

Rev. 03 — 4 May 2009

6 of 57

NXP Semiconductors

P89V52X2

80C51 with 256 B RAM, 192 B data EEPROM

P1[7]

I/O

P1[7] — Port 1 bit 7.

P2[0] to P2[7]

I/O with

internal

pull-up

Port 2: Port 2 is an 8-bit bidirectional I/O port with internal

pull-ups. Port 2 pins are pulled HIGH by the internal

pull-ups when ‘1’s are written to them and can be used as

inputs in this state. As inputs, Port 2 pins that are

externally pulled LOW will source current (IIL) because of

the internal pull-ups. Port 2 sends the high-order address

byte during fetches from external program memory and

during accesses to external Data Memory that use 16-bit

address (MOVX@DPTR). In this application, it uses strong

internal pull-ups when transitioning to ‘1’s.

P2[0]/A8

I/O

P2[0] — Port 2 bit 0.

A8 — Address bit 8.

P2[1]/A9

I/O

P2[1] — Port 2 bit 1.

A9 — Address bit 9.

P2[2]/A10

I/O

P2[2] — Port 2 bit 2.

A10 — Address bit 10.

P2[3]/A11

I/O

P2[3] — Port 2 bit 3.

A11 — Address bit 11.

P2[4]/A12

I/O

P2[4] — Port 2 bit 4.

A12 — Address bit 12.

P2[5]/A13

I/O

P2[5] — Port 2 bit 5.

A13 — Address bit 13.

P2[6]/A14

I/O

P2[6] — Port 2 bit 6.

A14 — Address bit 14.

P2[7]/A15

I/O

P2[7] — Port 2 bit 7.

A15 — Address bit 15.

P3[0] to P3[7]

I/O

with

internal

pull-up

Port 3: Port 3 is an 8-bit bidirectional I/O port with internal

pull-ups. Port 3 pins are pulled HIGH by the internal

pull-ups when ‘1’s are written to them and can be used as

inputs in this state. As inputs, Port 3 pins that are

externally pulled LOW will source current (IIL) because of

the internal pull-ups.

P3[0]/RXD

P3[0] — Port 3 bit 0.

RXD — Serial input port.

P3[1]/TXD

P3[1] — Port 3 bit 1.

TXD — Serial output port.

P3[2]/INT0

P3[2] — Port 3 bit 2.

INT0 — External interrupt 0 input.

P3[3]/INT1

P3[3] — Port 3 bit 3.

INT1 — External interrupt 1 input

P3[4]/T0

I/O

P3[4] — Port 3 bit 4.

T0 — External count input to Timer/Counter 0.

Table 2.

Pin description …continued

Symbol

Type

Description

DIP40

LQFP44

PLCC44

P89V52X2FN Datasheet(PDF) 6 Page - NXP Semiconductors

P89V52X2FN Datasheet(HTML) 6 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57

Datasheet Download

Link URL