Philips P89LPC903, P89LPC902 P89LPC901/902/903 Boot Vector, Boot Status, Bootvec, Bootstat

Page 102

 

Philips Semiconductors

 

 

 

 

 

 

 

 

 

User’s Manual - Preliminary -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FLASH PROGRAM MEMORY

 

 

 

 

P89LPC901/902/903

 

 

Boot Vector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOOTVEC

 

7

6

5

4

 

3

2

1

0

 

 

 

Address: xxxxh

 

 

-

-

-

BOOTV4

BOOTV3

BOOTV2

BOOTV1

BOOTV0

 

 

 

Factory default value: 00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

SYMBOL

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

BOOTVEC.7-5

-

Reserved (should remain unprogrammed at zero).

 

 

 

 

 

 

 

BOOTVEC.4-0

-

Boot Vector. If the Boot Vector is selected as the reset address, the P89LPC901/902/903

 

 

 

 

will start execution at an address comprised of 00H in the lower eight bits and this

 

 

 

 

BOOTVEC as the upper bits after a reset. (See section "Power-On reset code execution"

 

 

 

 

on page 73).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 14-9: Boot Vector (BOOTVEC)

 

 

 

 

 

 

 

 

Boot Status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOOTSTAT

 

7

6

5

4

 

3

2

1

0

 

 

 

Address: xxxxh

 

 

-

-

-

-

 

-

-

 

-

BSB

 

 

 

Factory default value: 00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

SYMBOL

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

BOOTSTAT.7-1

-

Reserved (should remain unprogrammed at zero).

 

 

 

 

 

 

 

BOOTSTAT.0

BSB

Boot Status Bit. If programmed to ‘1’, the P89LPC901/902/903 will always start execution

 

 

 

 

at an address comprised of 00H in the lower eight bits and BOOTVEC as the upper bits

 

 

 

 

after a reset. (See section "Power-On reset code execution" on page 73).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 14-10: Boot Status (BOOTSTAT)

 

 

 

 

 

 

2003 Dec 8

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Page 101 Page 103
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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 P89LPC901Oscillator Option Selection- P89LPC901 Clock Output P89LPC901On-Chip RC oscillator Option 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 OutputP89LPC901/902/903 Input-Only Configuration Push-Pull Output ConfigurationPort 0 Analog Functions 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.0P89LPC901/902/903 Mode Mode 6 P89LPC901Tcon Timer/Counter 0 or 1 in Mode 0 13-bit counter PclkTimer Overflow toggle output P89LPC901 Pclk TL0TR0 ENT0 Pclk TH0 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 UARTsFraming Error Break DetectBrgcon 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 Internal Reference Voltage Comparator InterruptCmpref Comparator and Power Reduction Modes Comparator Configuration ExampleKbpatn KBPATN.5,4Kbcon KbmaskKBMASK.3 KBMASK.7KBMASK.6 KBMASK.2Keypad Interrupt KBI Watchdog timer configuration Watchdog FunctionWdte Wdse Function Feed Sequence Wdcon P89LPC901/902/903 Watchdog Timeout Values Prescaler Reset PclkWDCONA7H Watchdog Clock Source P89LPC901/902/903 Watchdog Timer in Timer ModePower down operation PrescalerWatchdog Timer Watchdog Timer Watchdog Timer Software Reset Dual Data PointersAUXR1 MOVCA, @A+DPTR MOVXA, @DPTRMOVX@DPTR, a 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 aErase-programming additional flash elements Reading additional flash elementsUCFG1 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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