LOW Power Select P89LPC906, High freq, Med freq | Philips P89LPC908

Philips Semiconductors	User’s Manual - Preliminary -

CLOCKS	P89LPC906/907/908

LOW POWER SELECT (P89LPC906)

The P89LPC906 is designed to run at 12MHz (CCLK) maximum. However, if CCLK is 8MHz or slower, the CLKLP SFR bit (AUXR1.7) can be set to a ’1’ to lower the power consumption further. On any reset, CLKLP is ’0’ allowing highest performance. This bit can then be set in software if CCLK is running at 8MHz or slower.

	High freq.			RTCS1:0
XTAL1	High freq.
XTAL1	Med freq.
XTAL2	Med freq.				RTC
XTAL2	Low freq.				RTC
	Low freq.
	FOSC2:0
	OSC		CPU	CCLK
	CLK		CPU
	CLK	DIVM	Clock		CPU
		DIVM			CPU
RC Oscillator	Oscillator			/2
	Clock
(7.3728MHz)				PCLK
(7.3728MHz)
Watchdog					WDT
Watchdog
Oscillator
(400KHz)
			Timer 0 & 1

Figure 2-3: Block Diagram of Oscillator Control - P89LPC906

2003 Dec 8

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Image 28

Philips P89LPC908, P89LPC907 user manual LOW Power Select P89LPC906, High freq, Med freq, Low freq, Divm

Contents

User Manual Table of Contents Brownout Detection Power-On Detection Power Reduction Modes Power-On reset code execution 103 List of Figures List of Figures PIN Configurations P89LPC906 Logic Symbols Product Comparison Block Diagram P89LPC906 KB Code FlashCPU Oscillator Divider Block Diagram P89LPC907 UartByte Data RAM Clock Block Diagram P89LPC908 Data RAM Port PIN Descriptions P89LPC906 PIN Descriptions P89LPC907 P1.0TxD P1.2 PIN Descriptions P89LPC908 Keyboard Input P1.0 P1.5P1.1 RxD Special function registers Special function registers table P89LPC906 MSB 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 Memory Organization DataSFR Code Enhanced CPU Clock DefinitionsCPU Clock Oscclk LOW Speed Oscillator Option P89LPC906 Oscillator Option SELECTION- P89LPC906 Clock Output P89LPC906ON-CHIP RC Oscillator Option Watchdog Oscillator Option CPU Clock Cclk Wakeup Delay BIT Symbol FunctionExternal Clock Input Option P89LPC906 CPU Clock Cclk Modification Divm Register LOW Power Select P89LPC906 High freqMed freq Low freq CPU Clocks Flag Bits Address Enable Bits Priority Ranking Interrupt Priority StructureSummary of Interrupts P89LPC906 Description Interrupt Arbitration External Interrupt Inputs External Interrupt PIN Glitch SuppressionSummary of Interrupts P89LPC907,P89LPC908 Description TI & RI Bopd EBO Rtcf Kbif Interrupts Port Configurations QUASI-BIDIRECTIONAL Output ConfigurationNumber of I/O Pins Available Clock Source Reset Option RST Open Drain Output Configuration Port latch data INPUT-ONLY Configuration PUSH-PULL Output ConfigurationPort 0 Analog Functions Strong Port latch data Port pin Input data Glitch rejection Port Output Configuration P89LPC907 Port Output Configuration P89LPC906Port Output Configuration P89LPC908 Ports Ports Tmod TMOD.7TMOD.6 TMOD.3 Overflows. Mode ModeTamod P89LPC907 TAMOD.7-1 Tcon Pclk T0C/T = Overflow TLn THn TFn Interrupt T0 PinT0C/T = Overflow THn TFn Pclk TL0 Timer Overflow Toggle Output P89LPC907TR0 ENT0 Pclk TH0 Timers 0 REAL-TIME Clock Source FOSC2 FOSC1 FOSC0 RTCS10 UCFG1.2 UCFG1.1 UCFG1.0 Cclk Frequency RTC Clock FrequencyXclk Divm Cclk RC Oscillator/DIVM WDT Oscillator/DIVMUndefined External clock/DIVM Changing RTCS1-0 Reset Sources Affecting the REAL-TIME ClockREAL-TIME Clock INTERRUPT/WAKE UP Rtccon REAL-TIME CLOCK/SYSTEM Timer Brownout Detection Power Reduction Modes POWER-ON DetectionBrownout Options Power Reduction Modes Pcon Pcona Power Monitoring Functions Uart Modes SFR Space Baud Rate Generator and SelectionUpdating the BRGR1 and BRGR0 Sfrs SFR Locations for UARTs Break Detect Framing ErrorBrgcon Scon More about Uart Mode Sstat Serial 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 2More about Uart Modes 2 PCON.6 RB8 SMOD0 Double Buffering Double Buffering in Different Modes 9TH BIT BIT 8 in Double Buffering Modes 1, 2 Transmission with and without Double Buffering Multiprocessor Communications Automatic Address Recognition Uart Uart POWER-ON Reset Code Execution Block Diagram of Reset Rstsrc Comparator Configuration Comparator and Power Reduction Modes Internal Reference VoltageComparator Interrupt CIN1A CO1 CMP1 Cmpref Comparator Configuration Example Analog Comparators Kbpatn Kbcon Kbmask Watchdog Function Watchdog timer configurationWdte Wdse Function Feed Sequence Wdcon P89LPC906/907/908 Watchdog Timeout Values PRE2-PRE0 Watchdog Timer in Timer Mode Prescaler Reset PclkWatchdog Control register Power Down Operation Watchdog Clock SourcePrescaler CLK Watchdog Timer Watchdog Timer Dual Data Pointers Software ResetAUXR1 MOVCA, @A+DPTR Move code byte relative to Dptr to the accumulatorMOVXA, @DPTR MOVX@DPTR, a Features Using Flash AS Data StorageGeneral Description Introduction to IAP-LITE Flash Program Memory Fmcon Accessing Additional Flash Elements Assembly language routine to erase/program all or part of a Reading Additional Flash Elements ERASE-PROGRAMMING Additional Flash ElementsUCFG1 Fmadrl Conf UCFG1 User Configuration BytesP89LPC906 User Security Bytes SECxAddress xxxxh Unprogrammed value 00h Bootvec Bootstat Arithmetic Logical Mnemonic Description Bytes Cycles Hex Code Data Transfer Boolean Branching Reti B8-BFD8-DF Miscellaneous 2003 Dec Initial release 104 Index Dual Data Pointers Port 0 12, 13 SFR 109 P89LPC906/907/908