Philips P89LPC902, P89LPC901, P89LPC903 user manual CMP2, KBI0, CIN2A, KBI2, CMP1, KBI6

Page 14

Philips SemiconductorsUser’s Manual - Preliminary -

 

GENERAL DESCRIPTION

P89LPC901/902/903

 

 

 

 

PIN DESCRIPTIONS - P89LPC902

 

 

 

 

 

 

 

 

 

 

MNEMONIC

PIN NO.

TYPE

NAME AND FUNCTION

 

 

 

P0.0 - P0.6

2,3,5,6,7

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 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.

 

 

 

3

I/O

P0.0

Port 0 bit 0.

 

 

 

 

 

0

CMP2

Comparator 2 output.

 

 

 

 

 

I

KBI0

Keyboard Input 0.

 

 

 

 

2

I/O

P0.2

Port 0 bit 2.

 

 

 

 

 

I

CIN2A

Comparator 2 positive input.

 

 

 

 

 

I

KBI2

Keyboard Input 2.

 

 

 

 

7

I/O

P0.4

Port 0 bit 4.

 

 

 

 

 

I

CIN1A

Comparator 1 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.

 

 

 

 

5

I/O

P0.6

Port 0 bit 6.

 

 

 

 

 

O

CMP1

Comparator 1 output.

 

 

 

 

 

I

KBI6

Keyboard Input 6.

 

 

 

P1.5

4

I

Port 1:

Port 1 is a single-bit input-only port. I/O port without a pull-up.

 

 

 

 

 

 

This pin has a Schmitt trigger.

 

 

 

 

 

 

Port 1 also provides the special function described below.

 

 

 

 

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-System Programming mode.

 

 

 

VSS

8

I

Ground: 0V reference.

 

 

 

VDD

1

I

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

 

 

 

 

 

well as Idle and Power down modes.

 

 

2003 Dec 8

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Contents User Manual Philips SemiconductorsTable of Contents Power Monitoring Functions 103 P89LPC901/902/903 List of Figures Pin Configurations P89LPC902Logic Symbols Product comparisonBlock Diagram P89LPC901 CPUBlock Diagram P89LPC902 High Performance Accelerated 2-clock 80C51 CPUBlock Diagram P89LPC903 UartKBI4 Mnemonic PIN no Type Name and FunctionCIN1A KBI5P3.1 XTAL1CIN2A CMP2KBI0 KBI2P1.1 P1.0TxD RxDSpecial Function Registers Special Function Registers Table P89LPC901Bit Functions and Addresses Hex Special Function Registers Table P89LPC902 CMP1 Cmpref CIN1A KB2 KB0 KB6 KB5 KB4 A7H PRE2 PRE1 PRE0 Wdrun Wdtof Special Function Registers Table P89LPC903 F7H Psth PCH Pkbih TRIM.5 TRIM.4 TRIM.3 TRIM.2 TRIM.1 TRIM.0 WDCON# SFR P89LPC901/902/903 Memory OrganizationData CodeGeneral Description CPU Clock Oscclk Enhanced CPUClock Definitions Low Speed Oscillator Option P89LPC901On-Chip RC oscillator Option Oscillator Option Selection- P89LPC901Clock Output P89LPC901 External Clock Input Option P89LPC901 BIT Symbol FunctionWatchdog Oscillator Option TrimLow freq High freqMed freq DivmAtchdog L K CPU Clock Cclk Wakeup DelayCPU Clock Cclk Modification Divm Register O sc illa to rP89LPC901/902/903 Low Power Select P89LPC901 P89LPC901/902/903 Interrupt Priority Structure Interrupt Arbitration Flag Bits Address Enable Bits Priority RankingSummary of Interrupts P89LPC901 Description Summary of Interrupts P89LPC902 DescriptionP89LPC901/902/903 External Interrupt Inputs External Interrupt Pin Glitch SuppressionTF1 ET1 TI & RI/RI ES/ESR Number of I/O Pins Available Clock Source Reset Option Port ConfigurationsQuasi-Bidirectional Output Configuration RSTOpen Drain Output Configuration Quasi-Bidirectional OutputPort 0 Analog Functions P89LPC901/902/903 Input-Only ConfigurationPush-Pull Output Configuration Port Output Configuration P89LPC902 Additional Port FeaturesPort Output Configuration P89LPC901 Port Output Configuration P89LPC903Ports Ports TMOD.6 TmodTMOD.7 TMOD.3TAMOD.7-1 ModeTamod P89LPC901 TAMOD.0Tcon P89LPC901/902/903 ModeMode 6 P89LPC901 Timer/Counter 0 or 1 in Mode 0 13-bit counter PclkTR0 ENT0 Pclk TH0 Timer Overflow toggle output P89LPC901Pclk TL0 Timers 0 Real-time clock/system timer Block Diagram Real-time Clock SourceUCFG1.2 UCFG1.1 UCFG1.0 Cclk Frequency RTC Clock Frequency Real-time Clock/System Timer Clock Source P89LPC901FOSC2 FOSC1 FOSC0 RTCS10 XclkChanging RTCS1-0 Reset Sources Affecting the Real-time ClockReal-time Clock/System Timer Clock Source P89LPC902/903 Real-time Clock Interrupt/Wake UpRtccon Brownout Detection Power-On Detection Brownout OptionsP89LPC901/902/903 Power Reduction Modes Power Reduction ModesPcon Pcona Power Monitoring Functions Uart P89LPC903 Updating the BRGR1 and BRGR0 SFRs P89LPC901/902/903 SFR SpaceBaud Rate Generator and Selection SFR Locations for UARTsBrgcon Framing ErrorBreak Detect Scon More About Uart Mode SstatSerial Port Mode 0 Double Buffering Must Be Disabled P89LPC901/902/903 More About Uart Modes 2 Framing Error and RI in Modes 2 and 3 with SM2 =FE and RI when SM2 = 1 in Modes 2 PCON.6 RB8 SMOD0P89LPC901/902/903 Double Buffering Double Buffering in Different Modes9th Bit Bit 8 in Double Buffering Modes 1, 2 Transmission with and without Double BufferingMultiprocessor Communications Automatic Address RecognitionUart P89LPC903 Uart P89LPC903 Power-On reset code execution Block Diagram of ResetRstsrc Comparator Configuration CMPnComparator Input and Output Connections P89LPC901 Cmpref Internal Reference VoltageComparator Interrupt Comparator and Power Reduction Modes Comparator Configuration ExampleKbpatn KBPATN.5,4Kbcon KbmaskKBMASK.3 KBMASK.7KBMASK.6 KBMASK.2Keypad Interrupt KBI Wdte Wdse Function Watchdog timer configurationWatchdog Function Feed Sequence Wdcon WDCONA7H P89LPC901/902/903 Watchdog Timeout ValuesPrescaler Reset Pclk Watchdog Clock Source P89LPC901/902/903 Watchdog Timer in Timer ModePower down operation PrescalerWatchdog Timer Watchdog Timer Watchdog Timer AUXR1 Software ResetDual Data Pointers MOVX@DPTR, a MOVCA, @A+DPTRMOVXA, @DPTR General description FeaturesUsing Flash as data storage Introduction to IAP-LiteFlash Program Memory Fmcon Accessing additional flash elements C-language routine to erase/program all or part of aUCFG1 Erase-programming additional flash elementsReading additional flash elements Fmadrl User Configuration Bytes C-language routine to read a flash elementUCFG1 P89LPC901User Security Bytes SECxBootvec P89LPC901/902/903 Boot VectorBoot Status BootstatArithmetic LogicalMnemonic Description Bytes Cycles Hex Code Data TransferBoolean BranchingD8-DF RetiB8-BF MiscellaneousRevision History 108 Index Dual Data Pointers Port 0 12, 14 SFR 113 P89LPC901/902/903

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.
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