Philips P89LPC902, P89LPC901, P89LPC903 user manual Kbcon, Kbmask

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	Philips Semiconductors																									User’s Manual - Preliminary -

		KEYPAD INTERRUPT (KBI)																					P89LPC901/902/903

		KBPATN		7						6	5				4			3				2			1				0
		Address: 93h				-				-		KBPATN.5			KBPATN.4			-				KBPATN.2			-				-
		Not bit addressable
		Not bit addressable
		Reset Source(s): Any reset
		Reset Value: 11111111B
		BIT	SYMBOL	FUNCTION
		KBPATN.5,4,2	-	Pattern bit 6, bit 4, bit 2

				Figure 11-3: Keypad Pattern Register - P89LPC903

		KBCON
		Address: 94h		7						6	5				4			3				2			1				0
		Not bit addressable					-			-			-			-			-				-			PATN_SEL			KBIF
		Reset Source(s): Any reset
		Reset Value: xxxxxx00B
		BIT	SYMBOL	FUNCTION
		KBCON.7-2	-	Reserved
		KBCON.1	PATN_SEL	Pattern Matching Polarity selection. When set, Port 0 has to be equal to the user-defined
				Pattern in KBPATN to generate the interrupt. When clear, Port 0 has to be not equal to the
				value of KBPATN register to generate the interrupt.
		KBCON.0	KBIF	Keypad Interrupt Flag. Set when Port 0 matches user defined conditions specified in
				KBPATN, KBMASK, and PATN_SEL. Needs to be cleared by software by writing "0".

							Figure 11-4: Keypad Control Register

		KBMASK		7						6	5				4			3				2			1				0
		Address: 86h			-					-	KBMASK.5			KBMASK.4				-				-			-				-
		Not bit addressable
		Not bit addressable
		Reset Source(s): Any reset
		Reset Value: 00000000B
		BIT	SYMBOL		FUNCTION
		KBMASK.7:6	-		Reserved.
		KBMASK.5	-		When set, enables P0.5 as a cause of a Keypad Interrupt.
		KBMASK.4	-		When set, enables P0.4 as a cause of a Keypad Interrupt.
		KBMASK.3:0	-		Reserved.
		Note: the Keypad Interrupt must be enabled in order for the settings of the KBMASK register to be effective.
		Bits positions KBMASK.7, KBMASK.6, KBMASK.3, KBMASK.2, KBMASK.1, and KBMASK.0 should always be written as
		a ’0’.

			Figure 11-5: Keypad Interrupt Mask Register (KBM) - P89LPC901

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 UartMnemonic PIN no Type Name and Function CIN1AKBI4 KBI5P3.1 XTAL1CMP2 KBI0CIN2A KBI2P1.0 TxDP1.1 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# P89LPC901/902/903 Memory Organization DataSFR CodeGeneral Description Enhanced CPU Clock DefinitionsCPU Clock Oscclk Low Speed Oscillator Option P89LPC901On-Chip RC oscillator Option Oscillator Option Selection- P89LPC901Clock Output P89LPC901 BIT Symbol Function Watchdog Oscillator OptionExternal Clock Input Option P89LPC901 TrimHigh freq Med freqLow freq DivmAtchdog CPU Clock Cclk Wakeup Delay CPU Clock Cclk Modification Divm RegisterL K O sc illa to rP89LPC901/902/903 Low Power Select P89LPC901 P89LPC901/902/903 Interrupt Priority Structure Flag Bits Address Enable Bits Priority Ranking Summary of Interrupts P89LPC901 DescriptionInterrupt Arbitration Summary of Interrupts P89LPC902 DescriptionP89LPC901/902/903 External Interrupt Inputs External Interrupt Pin Glitch SuppressionTF1 ET1 TI & RI/RI ES/ESR Port Configurations Quasi-Bidirectional Output ConfigurationNumber of I/O Pins Available Clock Source Reset Option RSTOpen Drain Output Configuration Quasi-Bidirectional OutputPort 0 Analog Functions P89LPC901/902/903 Input-Only ConfigurationPush-Pull Output Configuration Additional Port Features Port Output Configuration P89LPC901Port Output Configuration P89LPC902 Port Output Configuration P89LPC903Ports Ports Tmod TMOD.7TMOD.6 TMOD.3Mode Tamod P89LPC901TAMOD.7-1 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 SourceReal-time Clock/System Timer Clock Source P89LPC901 FOSC2 FOSC1 FOSC0 RTCS10UCFG1.2 UCFG1.1 UCFG1.0 Cclk Frequency RTC Clock Frequency XclkReset Sources Affecting the Real-time Clock Real-time Clock/System Timer Clock Source P89LPC902/903Changing RTCS1-0 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 P89LPC901/902/903 SFR Space Baud Rate Generator and SelectionUpdating the BRGR1 and BRGR0 SFRs SFR Locations for UARTsBrgcon Framing ErrorBreak Detect Scon More About Uart Mode SstatSerial Port Mode 0 Double Buffering Must Be Disabled Framing Error and RI in Modes 2 and 3 with SM2 = FE and RI when SM2 = 1 in Modes 2P89LPC901/902/903 More About Uart 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.7 KBMASK.6KBMASK.3 KBMASK.2Keypad Interrupt KBI Wdte Wdse Function Watchdog timer configurationWatchdog Function Feed Sequence Wdcon WDCONA7H P89LPC901/902/903 Watchdog Timeout ValuesPrescaler Reset Pclk P89LPC901/902/903 Watchdog Timer in Timer Mode Power down operationWatchdog Clock Source PrescalerWatchdog Timer Watchdog Timer Watchdog Timer AUXR1 Software ResetDual Data Pointers MOVX@DPTR, a MOVCA, @A+DPTRMOVXA, @DPTR Features Using Flash as data storageGeneral description 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 SECxP89LPC901/902/903 Boot Vector Boot StatusBootvec BootstatArithmetic LogicalMnemonic Description Bytes Cycles Hex Code Data TransferBoolean BranchingReti B8-BFD8-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.