Philips SemiconductorsUser’s Manual - Preliminary -

 

GENERAL DESCRIPTION

P89LPC901/902/903

 

 

 

 

PIN DESCRIPTIONS - P89LPC901

 

 

 

 

 

 

 

 

 

 

MNEMONIC

PIN NO.

TYPE

NAME AND FUNCTION

 

 

 

P0.0 - P0.6

6, 7

I/O

Port 0:

Port 0 is an I/O port with a user-configurable output types.

 

 

 

 

 

 

During reset Port 0 latches are configured in the input only

 

 

 

 

 

 

mode with the internal pullup 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 the section on

I/O port

 

 

 

 

 

 

configuration and the DC Electrical Characteristics in the

 

 

 

 

 

 

Data Sheet 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.

 

 

 

7

I/O

P0.4

Port 0 bit 4.

 

 

 

 

 

I

CIN1A

Comparator positive input.

 

 

 

 

 

I

KBI4

Keyboard Input 4.

 

 

 

 

6

I/O

P0.5

Port 0 bit 5.

 

 

 

 

 

I

CMPREFComparator reference (negative) input.

 

 

 

 

I

KBI5

Keyboard Input 5.

 

 

 

P1.0 - P1.5

4,5

 

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 the section on I/O port configuration and the DC

 

 

 

 

 

 

Electrical Characteristics in the Data Sheet 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

P1.2

Port 1 bit 2.

 

 

 

 

 

I/O

T0

Timer/counter 0 external count input or overflow output.

 

 

 

4

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-Circuit Programming mode.

 

 

P3.0 - P3.1

2, 3

I/O

Port 3

Port 3 is an I/O port with a user-configurable output types.

 

 

 

 

 

 

During reset Port 3 latches are configured in the input only

 

 

 

 

 

 

mode with the internal pullup disabled. The operation of

 

 

 

 

 

 

port 3 pins as inputs and outputs depends upon the port

 

 

 

 

 

 

configuration selected. Each port pin is configured

 

 

 

 

 

 

independently. Refer to the section on

I/O port

 

 

 

 

 

 

configuration and the DC Electrical Characteristics in the

 

 

 

 

 

 

Data Sheet for details.

 

 

 

 

 

 

All pins have Schmitt triggered inputs.

 

 

 

 

 

 

Port 3 also provides various special functions as described below:

 

 

 

3

I/O

P3.0

Port 3 bit 0.

 

 

2003 Dec 8

12

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Philips P89LPC901, P89LPC903, P89LPC902 user manual Mnemonic PIN no Type Name and Function, CIN1A, KBI4, KBI5, Rst

P89LPC903, P89LPC902, P89LPC901 specifications

The Philips P89LPC901, P89LPC902, and P89LPC903 are a series of 8-bit microcontrollers designed for embedded system applications. These models, which belong to the LPC900 series, are notable for their affordability and versatility, making them an attractive choice for both hobbyists and professional developers.

One of the core features of the P89LPC901, P89LPC902, and P89LPC903 microcontrollers is their powerful 8-bit architecture. Operating at clock speeds up to 20 MHz, they deliver efficient performance suited for a range of tasks. Each model includes a comprehensive instruction set that supports various data manipulation and arithmetic functions, enabling extensive programming capabilities.

These microcontrollers come with built-in memory, with configurations that vary among the three models. The P89LPC901 typically features 4 KB of Flash memory and 256 bytes of RAM, while the P89LPC902 and P89LPC903 offer enhanced memory options. This Flash memory allows for reprogrammability, making it easier to update and modify applications as needed.

Another significant characteristic of the LPC900 series is their integrated peripherals. These models are equipped with a variety of I/O ports, allowing for easy interfacing with other devices and components. The P89LPC901 supports up to 32 I/O pins, while the P89LPC902 and P89LPC903 provide additional features such as analog-to-digital converters (ADCs), timers, and serial communication interfaces. This broad range of peripherals empowers developers to design complex applications without needing extra hardware.

Power consumption is also a key consideration for microcontroller applications. The P89LPC901, P89LPC902, and P89LPC903 are designed with low power consumption in mind, making them ideal for battery-operated devices and energy-efficient projects. They can operate in various power modes, allowing for greater flexibility in deployment.

In terms of technology, these microcontrollers utilize advanced CMOS technology, ensuring high reliability and durability. Their design offers a robust solution for numerous applications, including consumer electronics, industrial controls, and automation systems.

In summary, the Philips P89LPC901, P89LPC902, and P89LPC903 microcontrollers present an attractive combination of performance, integrated peripherals, low power consumption, and versatility. Their features cater to a wide array of applications, keeping them relevant in a rapidly evolving technology landscape. For hobbyists and professionals alike, these microcontrollers represent a reliable foundation for embedded system development.