Philips P89LPC902, P89LPC901, P89LPC903 user manual User Security Bytes, SECx

Page 101

 

Philips Semiconductors

User’s Manual - Preliminary -

 

 

 

 

 

 

FLASH PROGRAM MEMORY

P89LPC901/902/903

 

 

USER SECURITY BYTES

 

 

There are four User Sector Security Bytes (SEC0, ..., SEC3), each corresponding to one sector and having the following bit assignments:

SECx

 

 

 

7

 

6

 

5

4

 

3

2

1

0

 

 

Address: xxxxh

 

 

 

 

 

 

 

 

 

 

-

 

-

 

-

 

-

 

-

EDISx

SPEDISx

MOVCDISx

 

 

 

 

 

 

 

 

 

 

 

 

 

Unprogrammed value: 00h

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BIT

 

SYMBOL

 

FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

SECx.7-3

-

 

Reserved (should remain unprogrammed at zero).

 

 

 

 

 

SECx.2

 

 

EDISx

 

Erase Disable x. Disables the ability to perform an erase of sector "x" in IAP mode. When

 

 

 

 

 

 

programmed, this bit and sector x can only be erased by a 'global' erase command using

 

 

 

 

 

 

a commercial programmer . This bit and sector x CANNOT be erased in IAP mode.

SECx.1

 

SPEDISx

 

Sector Program Erase Disable x. Disables program or erase of all or part of sector x.

 

 

 

 

 

 

This bit and sector x are erased by either a sector erase command (IAP or commercial

 

 

 

 

 

 

programmer) or a 'global' erase command (commercial programmer).

 

 

 

SECx.0

 

MOVCDISx

 

MOVC Disable. Disables the MOVC command for sector x. Any MOVC that attempts to

 

 

 

 

 

 

read a byte in a MOVC protected sector will return invalid data. This bit can only be erased

 

 

 

 

 

 

when sector x is erased.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 14-8: User Sector Security Bytes (SEC0 ... SEC3)

 

 

 

 

Table 14-2: Effects of Security Bits

 

 

 

 

 

 

 

 

 

 

 

 

EDISx

 

SPEDISx

MOVCDISx

 

 

 

 

 

 

Effects on Programming

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

 

0

None.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Security violation flag set for sector CRC calculation for the specific sector. Security

 

0

 

0

 

1

violation flag set for global CRC calculation if any MOVCDISx bit is set. Cycle aborted.

 

 

 

Memory contents unchanged. CRC invalid. Program/erase commands will not result

 

 

 

 

 

 

 

 

 

 

 

 

in a security violation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

1

 

x

Security violation flag set for program commands or an erase page command. Cycle

 

 

 

aborted. Memory contents unchanged. Sector erase and global erase are allowed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

x

 

x

Security violation flag set for program or erase commands. Cycle aborted. Memory

 

 

 

contents unchanged. Global erase is allowed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2003 Dec 8

101

Page 100 Page 102
Image 101
Page 100 Page 102
Contents Philips Semiconductors User ManualTable of Contents Power Monitoring Functions 103 P89LPC901/902/903 List of Figures P89LPC902 Pin ConfigurationsProduct comparison Logic SymbolsCPU Block Diagram P89LPC901High Performance Accelerated 2-clock 80C51 CPU Block Diagram P89LPC902Uart Block Diagram P89LPC903CIN1A Mnemonic PIN no Type Name and FunctionKBI4 KBI5XTAL1 P3.1KBI0 CMP2CIN2A KBI2TxD P1.0P1.1 RxDSpecial Function Registers Table P89LPC901 Special Function RegistersBit 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# Data P89LPC901/902/903 Memory OrganizationSFR CodeGeneral Description Clock Definitions Enhanced CPUCPU Clock Oscclk Low Speed Oscillator Option P89LPC901On-Chip RC oscillator Option Oscillator Option Selection- P89LPC901Clock Output P89LPC901 Watchdog Oscillator Option BIT Symbol FunctionExternal Clock Input Option P89LPC901 TrimMed freq High freqLow freq DivmAtchdog CPU Clock Cclk Modification Divm Register CPU Clock Cclk Wakeup DelayL K O sc illa to rP89LPC901/902/903 Low Power Select P89LPC901 P89LPC901/902/903 Interrupt Priority Structure Summary of Interrupts P89LPC901 Description Flag Bits Address Enable Bits Priority RankingInterrupt Arbitration Summary of Interrupts P89LPC902 DescriptionExternal Interrupt Pin Glitch Suppression P89LPC901/902/903 External Interrupt InputsTF1 ET1 TI & RI/RI ES/ESR Quasi-Bidirectional Output Configuration Port ConfigurationsNumber of I/O Pins Available Clock Source Reset Option RSTQuasi-Bidirectional Output Open Drain Output ConfigurationPort 0 Analog Functions P89LPC901/902/903 Input-Only ConfigurationPush-Pull Output Configuration Port Output Configuration P89LPC901 Additional Port FeaturesPort Output Configuration P89LPC902 Port Output Configuration P89LPC903Ports Ports TMOD.7 TmodTMOD.6 TMOD.3Tamod P89LPC901 ModeTAMOD.7-1 TAMOD.0Tcon P89LPC901/902/903 ModeMode 6 P89LPC901 Pclk Timer/Counter 0 or 1 in Mode 0 13-bit counterTR0 ENT0 Pclk TH0 Timer Overflow toggle output P89LPC901Pclk TL0 Timers 0 Real-time Clock Source Real-time clock/system timer Block DiagramFOSC2 FOSC1 FOSC0 RTCS10 Real-time Clock/System Timer Clock Source P89LPC901UCFG1.2 UCFG1.1 UCFG1.0 Cclk Frequency RTC Clock Frequency XclkReal-time Clock/System Timer Clock Source P89LPC902/903 Reset Sources Affecting the Real-time ClockChanging RTCS1-0 Real-time Clock Interrupt/Wake UpRtccon Brownout Detection Brownout Options Power-On DetectionPower Reduction Modes P89LPC901/902/903 Power Reduction ModesPcon Pcona Power Monitoring Functions Uart P89LPC903 Baud Rate Generator and Selection P89LPC901/902/903 SFR SpaceUpdating the BRGR1 and BRGR0 SFRs SFR Locations for UARTsBrgcon Framing ErrorBreak Detect Scon Sstat More About Uart ModeSerial Port Mode 0 Double Buffering Must Be Disabled FE and RI when SM2 = 1 in Modes 2 Framing Error and RI in Modes 2 and 3 with SM2 =P89LPC901/902/903 More About Uart Modes 2 PCON.6 RB8 SMOD0Double Buffering in Different Modes P89LPC901/902/903 Double BufferingTransmission with and without Double Buffering 9th Bit Bit 8 in Double Buffering Modes 1, 2Automatic Address Recognition Multiprocessor CommunicationsUart P89LPC903 Uart P89LPC903 Block Diagram of Reset Power-On reset code executionRstsrc CMPn Comparator ConfigurationComparator Input and Output Connections P89LPC901 Cmpref Internal Reference VoltageComparator Interrupt Comparator Configuration Example Comparator and Power Reduction ModesKBPATN.5,4 KbpatnKbmask KbconKBMASK.6 KBMASK.7KBMASK.3 KBMASK.2Keypad Interrupt KBI Wdte Wdse Function Watchdog timer configurationWatchdog Function Feed Sequence Wdcon WDCONA7H P89LPC901/902/903 Watchdog Timeout ValuesPrescaler Reset Pclk Power down operation P89LPC901/902/903 Watchdog Timer in Timer ModeWatchdog Clock Source PrescalerWatchdog Timer Watchdog Timer Watchdog Timer AUXR1 Software ResetDual Data Pointers MOVX@DPTR, a MOVCA, @A+DPTRMOVXA, @DPTR Using Flash as data storage FeaturesGeneral description Introduction to IAP-LiteFlash Program Memory Fmcon C-language routine to erase/program all or part of a Accessing additional flash elementsUCFG1 Erase-programming additional flash elementsReading additional flash elements Fmadrl C-language routine to read a flash element User Configuration BytesP89LPC901 UCFG1SECx User Security BytesBoot Status P89LPC901/902/903 Boot VectorBootvec BootstatLogical ArithmeticData Transfer Mnemonic Description Bytes Cycles Hex CodeBranching BooleanB8-BF RetiD8-DF 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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