P89LPC920 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P89LPC920

8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM

Philips Electronics 

Philips Semiconductors

P89LPC920/921/922

8-bit microcontrollers with two-clock 80C51 core

5.2 Pin description

Table 3: Pin description

Symbol

Pin

Type

P0.0 - P0.7

1, 20, 19, I/O

18, 17, 16,

14, 13

1

I/O

O

I

20

I/O

I

I

19

I/O

I

I

18

I/O

I

I

17

I/O

I

I

16

I/O

I

I

14

I/O

O

I

13

I/O

I/O

I

Description

Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. During reset

Port 0 latches are configured in the input only mode with the internal pull-up disabled.

The operation of Port 0 pins as inputs and outputs depends upon the port configuration

selected. Each port pin is configured independently. Refer to Section 8.12.1 “Port

configurations” and Table 8 “DC electrical characteristics” for details.

The Keypad Interrupt feature operates with Port 0 pins.

All pins have Schmitt triggered inputs.

Port 0 also provides various special functions as described below:

P0.0 — Port 0 bit 0.

CMP2 — Comparator 2 output.

KBI0 — Keyboard input 0.

P0.1 — Port 0 bit 1.

CIN2B — Comparator 2 positive input B.

KBI1 — Keyboard input 1.

P0.2 — Port 0 bit 2.

CIN2A — Comparator 2 positive input A.

KBI2 — Keyboard input 2.

P0.3 — Port 0 bit 3.

CIN1B — Comparator 1 positive input B.

KBI3 — Keyboard input 3.

P0.4 — Port 0 bit 4.

CIN1A — Comparator 1 positive input A.

KBI4 — Keyboard input 4.

P0.5 — Port 0 bit 5.

CMPREF — Comparator reference (negative) input.

KBI5 — Keyboard input 5.

P0.6 — Port 0 bit 6.

CMP1 — Comparator 1 output.

KBI6 — Keyboard input 6.

P0.7 — Port 0 bit 7.

T1 — Timer/counter 1 external count input or overflow output.

KBI7 — Keyboard input 7.

9397 750 12285

Product data

Rev. 06 — 21 November 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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