P89LPC906 查看數據表（PDF） - Philips Electronics

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P89LPC906

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

Philips Electronics 

Philips Semiconductors

P89LPC906/907/908

8-bit microcontrollers with two-clock 80C51 core

Table 5: P89LPC908 pin description…continued

Symbol

Pin

Type Description

P1.0 to P1.5

Port 1: Port 1 is an I/O port with a user-configurable output types. During reset Port 1

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

operation of the configurable Port 1 pins as inputs and outputs depends upon the

port configuration selected. Each of the configurable port pins are programmed

independently. Refer to Section 8.11.1 “Port configurations” and Table 13 “DC

electrical characteristics” for details. P1.5 is input only.

All pins have Schmitt triggered inputs.

Port 1 also provides various special functions as described below:

5

I/O

P1.0 — Port 1 bit 0.

O

TxD — Serial port transmitter data.

4

I/O

P1.1 — Port 1 bit 1.

I

RxD — Serial port receiver data.

1

I

P1.5 — Port 1 bit 5 (input only).

I

RST — External Reset input during Power-on or if selected via UCFG1. When

functioning as a reset input a LOW on this pin resets the microcontroller, causing I/O

ports and peripherals to take on their default states, and the processor begins

execution at address 0. Also used during a power-on sequence to force In-System

Programming mode.

VSS

2

I

Ground: 0 V reference.

VDD

6

I

Power Supply: This is the power supply voltage for normal operation as well as Idle

and Power-down modes.

9397 750 14467

Product data

Rev. 05 — 17 December 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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