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Philips P89LPC906, P89LPC908 Timer Overflow Toggle Output P89LPC907, Pclk TL0, TR0 ENT0 Pclk TH0

Models: P89LPC907 P89LPC908 P89LPC906

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Philips Semiconductors	User’s Manual - Preliminary -

TIMERS 0 AND 1	P89LPC906/907/908

PCLK	C/T = 0		TL0	Overflow
PCLK
					TF0	Interrupt
T0 Pin*			(8-bits)		TF0	Interrupt
	C/T = 1	Control	(8-bits)
		Control		Toggle


						T0 Pin*
	TR0				ENT0
					ENT0
	PCLK		TH0	Overflow	TF1	Interrupt
	PCLK	Control	(8-bits)		TF1	Interrupt
			(8-bits)

	TR1			* T0 Pin functions available on P89LPC907
				* T0 Pin functions available on P89LPC907
	Figure 5-7: Timer/Counter 0 Mode 3 (two 8-bit counters)


PCLK		T0C/T = 0
PCLK

TR0

Control

TL0	Overflow
TL0	Overflow	TF0		Interrupt
(8-bits)

Reload TH0 on falling transition and (256-TH0) on rising transition Toggle

T0 Pin

TH0
(8-bits)	ENT0 (AUXR1.4)

Figure 5-8: Timer/Counter 0 in Mode 6 (PWM auto-reload), P89LPC907.

TIMER OVERFLOW TOGGLE OUTPUT - P89LPC907

Timer 0 can be configured to automatically toggle the T0 pin whenever the timer overflow occurs. This function is enabled by control bit ENT0 in the AUXR1 register. The port output will be a logic 1 prior to the first timer overflow when this mode is turned on. In order for this mode to function, the T0C/T bit must be cleared selecting PCLK as the clock source for the timer.

2003 Dec 8

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Image 45

Philips P89LPC906, P89LPC908 user manual Timer Overflow Toggle Output P89LPC907, Pclk TL0, TR0 ENT0 Pclk TH0

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 P89LPC906 Port Output Configuration P89LPC907Port Output Configuration P89LPC908 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 TFnTimer Overflow Toggle Output P89LPC907 Pclk TL0TR0 ENT0 Pclk TH0 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/DIVMReset Sources Affecting the REAL-TIME Clock Changing RTCS1-0REAL-TIME Clock INTERRUPT/WAKE UP Rtccon REAL-TIME CLOCK/SYSTEM Timer Brownout Detection POWER-ON Detection Power Reduction ModesBrownout Options Power Reduction Modes Pcon Pcona Power Monitoring Functions Modes UartBaud Rate Generator and Selection SFR SpaceUpdating the BRGR1 and BRGR0 Sfrs SFR Locations for UARTsFraming Error Break DetectBrgcon 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 Watchdog timer configuration Watchdog FunctionWdte Wdse 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 Software Reset Dual Data PointersAUXR1 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 ElementsERASE-PROGRAMMING Additional Flash Elements Reading Additional Flash ElementsUCFG1 Fmadrl Conf User Configuration Bytes UCFG1P89LPC906 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