Philips P89LPC907, P89LPC906, P89LPC908 General Description, Features, Introduction to IAP-LITE

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Philips Semiconductors

User’s Manual - Preliminary -

 

 

 

FLASH PROGRAM MEMORY

P89LPC906/907/908

14. FLASH PROGRAM MEMORY

 

 

GENERAL DESCRIPTION

The P89LPC906/907/908 Flash memory provides in-circuit electrical erasure and programming. The Flash can be read and written as bytes. On-chip erase and write timing generation contribute to a user-friendly programming interface. The cell is designed to optimize the erase and programming mechanisms. The P89LPC906/907/908 uses VDD as the supply voltage to perform the Program/Erase algorithms. Additionally, serial programming using commercially available programmers provides a simple inteface to achieve in-circuit programming.The P89LPC906/907/908 Flash reliably stores memory contents after 100,000 erase and program cycles (typical).

FEATURES

•IAP-Lite allows individual and multiple bytes of code memory to be used for data storage.

•Programming and erase over the full operating voltage range

•Read/Programming/Erase using IAP-Lite

•Any flash program operation in 2 ms (4ms for erase/program)

•Serial programming with industry-standard commercial programmers allows in-circuit programming.

•Programmable security for the code in the Flash for each sector.

•>100,000 typical erase/program cycles for each byte.

•256 byte sector size, 16 byte page size

•10-year minimum data retention.

INTRODUCTION TO IAP-LITE

The Flash code memory array of this device supports IAP-Lite programming and erase functions. Any byte in a non-secured sector of the code memory array may be read using the MOVC instruction and thus is suitable for use as non-volatile data stor- age. In addition, the user’s code may access additional flash elements. These include UCFG1, the Boot Vector, Status Bit, secu- rity bytes, and signature bytes. Access of these elements uses a slightly different method than that used to access the user code memory.

USING FLASH AS DATA STORAGE

IAP-Lite provides an erase-program function that makes it easy for one or more bytes within a page to be erased and pro- grammed in a single operation without the need to erase or program any other bytes in the page. IAP-Lite is performed in the application under the control of the microcontroller’s firmware using four SFRs and an internal 16-byte "page register" to facili- tate erasing and programming within unsecured sectors. These SFRs are:

•FMCON (Flash Control Register). When read, this is the status register. When written, this is a command register. Note that the status bits are cleared to ’0’s when the command is written.

•FMDATA (Flash Data Register). Accepts data to be loaded into the page register.

•FMADRL, FMADRH (Flash memory address low, Flash memory address high). Used to specify the byte address within the page register or specify the page within user code memory.

The page register consists of 16 bytes and an update flag for each byte. When a LOAD command is issued to FMCON the page register contents and all of the update flags will be cleared. When FMDATA is written, the value written to FMDATA will be stored in the page register at the location specified by the lower 6 bits of FMADRL. In addition, the update flag for that location will be set. FMADRL will auto-increment to the next location. Auto-increment after writing to the last byte in the page register will

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Contents User Manual Table of Contents Power-On reset code execution Brownout Detection Power-On Detection Power Reduction Modes103 List of Figures List of Figures P89LPC906 PIN ConfigurationsProduct Comparison Logic SymbolsKB Code Flash Block Diagram P89LPC906CPU Oscillator DividerUart Block Diagram P89LPC907Byte Data RAM ClockData RAM Port Block Diagram P89LPC908PIN Descriptions P89LPC906 P1.0 PIN Descriptions P89LPC907TxD P1.2Keyboard Input P1.0 P1.5 PIN Descriptions P89LPC908P1.1 RxDSpecial function registers table P89LPC906 Special function registersMSB LSB Hex Special function registers table P89LPC907 CMP1 Cmpref TRIM.5 TRIM.4 TRIM.3 TRIM.2 TRIM.1 TRIM.0 WDCON# Special function registers table P89LPC908 KB2 KB6 KB5 KB4 TL0 Data Memory OrganizationSFR CodeClock Definitions Enhanced CPUCPU Clock Oscclk LOW Speed Oscillator Option P89LPC906Clock Output P89LPC906 Oscillator Option SELECTION- P89LPC906ON-CHIP RC Oscillator Option Watchdog Oscillator OptionBIT Symbol Function CPU Clock Cclk Wakeup DelayExternal Clock Input Option P89LPC906 CPU Clock Cclk Modification Divm RegisterHigh freq LOW Power Select P89LPC906Med freq Low freqCPU Clocks Interrupt Priority Structure Flag Bits Address Enable Bits Priority RankingSummary of Interrupts P89LPC906 Description Interrupt ArbitrationExternal Interrupt PIN Glitch Suppression External Interrupt InputsSummary of Interrupts P89LPC907,P89LPC908 Description TI & RIBopd EBO Rtcf Kbif Interrupts QUASI-BIDIRECTIONAL Output Configuration Port ConfigurationsNumber of I/O Pins Available Clock Source Reset Option RSTPort latch data Open Drain Output ConfigurationPUSH-PULL Output Configuration INPUT-ONLY ConfigurationPort 0 Analog Functions Strong Port latch data Port pin Input data Glitch rejectionPort Output Configuration P89LPC908 Port Output Configuration P89LPC906Port Output Configuration P89LPC907 Ports Ports TMOD.7 TmodTMOD.6 TMOD.3Mode Overflows. ModeTamod P89LPC907 TAMOD.7-1Tcon T0C/T = Overflow TLn THn TFn Interrupt T0 Pin PclkT0C/T = Overflow THn TFnTR0 ENT0 Pclk TH0 Timer Overflow Toggle Output P89LPC907Pclk TL0 Timers 0 REAL-TIME Clock Source UCFG1.2 UCFG1.1 UCFG1.0 Cclk Frequency RTC Clock Frequency FOSC2 FOSC1 FOSC0 RTCS10Xclk Divm CclkWDT Oscillator/DIVM RC Oscillator/DIVMUndefined External clock/DIVMREAL-TIME Clock INTERRUPT/WAKE UP Reset Sources Affecting the REAL-TIME ClockChanging RTCS1-0 Rtccon REAL-TIME CLOCK/SYSTEM Timer Brownout Detection Brownout Options POWER-ON DetectionPower Reduction Modes Power Reduction Modes Pcon Pcona Power Monitoring Functions Modes UartBaud Rate Generator and Selection 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 =More about Uart Modes 2 PCON.6 RB8 SMOD0Double Buffering in Different Modes Double BufferingTransmission with and without Double Buffering 9TH BIT BIT 8 in Double Buffering Modes 1, 2Automatic Address Recognition Multiprocessor CommunicationsUart Uart Block Diagram of Reset POWER-ON Reset Code ExecutionRstsrc Comparator Configuration Internal Reference Voltage Comparator and Power Reduction ModesComparator Interrupt CIN1A CO1 CMP1 CmprefComparator Configuration Example Analog Comparators Kbcon KbpatnKbmask Wdte Wdse Function Watchdog timer configurationWatchdog Function Feed Sequence Wdcon PRE2-PRE0 P89LPC906/907/908 Watchdog Timeout ValuesPrescaler Reset Pclk Watchdog Timer in Timer ModeWatchdog Control registerWatchdog Clock Source Power Down OperationPrescaler CLKWatchdog Timer Watchdog Timer AUXR1 Software ResetDual Data Pointers Move code byte relative to Dptr to the accumulator MOVCA, @A+DPTRMOVXA, @DPTR MOVX@DPTR, aUsing Flash AS Data Storage FeaturesGeneral Description Introduction to IAP-LITEFlash Program Memory Fmcon Assembly language routine to erase/program all or part of a Accessing Additional Flash ElementsUCFG1 ERASE-PROGRAMMING Additional Flash ElementsReading Additional Flash Elements Fmadrl Conf P89LPC906 User Configuration BytesUCFG1 SECx User Security BytesAddress xxxxh Unprogrammed value 00hBootstat BootvecLogical ArithmeticData Transfer Mnemonic Description Bytes Cycles Hex CodeBranching BooleanB8-BF RetiD8-DF Miscellaneous2003 Dec Initial release 104 Index Dual Data Pointers Port 0 12, 13 SFR 109 P89LPC906/907/908
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