Philips Semiconductors

User’s Manual - Preliminary -

 

 

 

 

 

 

GENERAL DESCRIPTION

P89LPC901/902/903

 

 

 

 

 

SPECIAL FUNCTION REGISTERS

 

 

Note: Special Function Registers (SFRs) accesses are restricted in the following ways:

1.User must NOT attempt to access any SFR locations not defined.

2.Accesses to any defined SFR locations must be strictly for the functions for the SFRs.

3.SFR bits labeled ’-’, ’0’ or ’1’ can ONLY be written and read as follows:

-’-’ Unless otherwise specified, MUST be written with ’0’, but can return any value when read (even if it was written with ’0’). It is a reserved bit and may be used in future derivatives.

-’0’ MUST be written with ’0’, and will return a ’0’ when read.

-’1’ MUST be written with ’1’, and will return a ’1’ when read.

Special Function Registers Table - P89LPC901

Name

Description

SFR

 

 

Bit Functions and Addresses

 

 

Reset Value

Address

MSB

 

 

 

 

 

 

LSB

Hex

Binary

 

 

 

 

 

 

 

 

 

 

 

E7

E6

E5

E4

E3

E2

E1

E0

 

 

ACC*

Accumulator

E0H

 

 

 

 

 

 

 

 

00H

00000000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00H1

000000x0

 

 

 

 

 

 

 

 

 

 

 

AUXR1#

Auxiliary Function Register

A2H

CLKLP

-

-

ENT0

SRST

0

-

DPS

 

 

 

F7

F6

F5

F4

F3

F2

F1

F0

 

 

B*

B Register

F0H

 

 

 

 

 

 

 

 

00H

00000000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00H1

xx000000

 

 

 

 

 

 

 

 

 

 

 

CMP1#

Comparator 1 Control Register

ACH

-

-

CE1

-

CN1

-

CO1

CMF1

DIVM#

CPU Clock Divide-by-M Control

95H

 

 

 

 

 

 

 

 

00H

00000000

DPTR

Data Pointer (2 bytes)

 

 

 

 

 

 

 

 

 

 

 

DPH

Data Pointer High

83H

 

 

 

 

 

 

 

 

00H

00000000

DPL

Data Pointer Low

82H

 

 

 

 

 

 

 

 

00H

00000000

FMADRH#

Program Flash Address High

E7H

 

 

 

 

 

 

 

 

00H

00000000

FMADRL#

Program Flash Address Low

E6H

 

 

 

 

 

 

 

 

00H

00000000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Program Flash Control (Read)

 

BUSY

-

-

-

HVA

HVE

SV

OI

70H

01110000

FMCON#

 

E4H

 

 

 

 

 

 

 

 

 

 

Program Flash Control (Write)

FMCMD.

FMCMD.

FMCMD.

FMCMD.

FMCMD.

FMCMD.

FMCMD.

FMCMD.

 

 

 

 

7

6

5

4

3

2

1

0

 

 

 

 

 

 

 

FMDATA#

Program Flash Data

E5H

 

 

 

 

 

 

 

 

00H

00000000

 

 

 

 

 

 

 

 

 

 

 

AF

AE

AD

AC

AB

AA

A9

A8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IEN0*

Interrupt Enable 0

A8H

EA

EWDRT

EBO

-

ET1

-

ET0

-

00H

00000000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EF

EE

ED

EC

EB

EA

E9

E8

 

 

 

 

 

 

 

 

 

 

 

 

 

00H1

00x00000

IEN1*#

Interrupt Enable 1

E8H

-

-

-

-

-

EC

EKBI

-

 

 

 

BF

BE

BD

BC

BB

BA

B9

B8

 

 

 

 

 

 

 

 

 

 

 

 

 

00H1

x0000000

IP0*

Interrupt Priority 0

B8H

-

PWDRT

PBO

-

PT1

-

PT0

-

 

 

 

 

 

 

 

 

 

 

 

 

 

2003 Dec 8

16

Page 16
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Philips P89LPC903, P89LPC902 user manual Special Function Registers Table P89LPC901

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.