IBM manual 740 EM78P312N 809N, Oscillator Type Frequency Mode Frequency C1 pF C2 pF

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EM78P312N

8-Bit Microcontroller

OSCI	Ext. Clock

OSCO
EM78P312N809N
Fig. 5-29	Crystal/Resonator Circuit
		C1
OSCI
EM78P312N	XTAL
EM78P809N
OSCO		C2
	RS	C2
	RS
Fig. 5-30 Crystal/Resonator Circuit

Table12. Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonator

Oscillator Type	Frequency Mode

Frequency C1 (pF) C2 (pF)

Ceramic Resonator	HXT	2.0 MHz	20~40	20~40

		4.0 MHz	10~30	10~30
		4.0 MHz	10~30	10~30

		1.0 MHz	15~30	15~30
Crystal Oscillator	HXT
Crystal Oscillator	HXT	2.0 MHz	15	15

		4.0 MHz	15	15

		33	33
		0	0
OSCI		C
OSCI		740	740
		740	740
EM78P312N809N	4	4	4
EM78P312N809N
		XTAL
Fig. 5-31	Crystal/Resonator-Series Mode Circuit

Product Specification (V1.0) 10.03.2006

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(This specification is subject to change without further notice)

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Contents DOC. Version EM78P312NElan Microelectronics Corporation Contents 16.3 14.116.1 16.2Bit Microcontroller General DescriptionPin Description Symbol Pin No Type FunctionFunction Description Functional Block DiagramOperating Registers Operating RegistersR1 Time Clock /Counter Bit Microcontroller R0 Indirect Addressing RegisterR2 Program Counter & Stack RBS1 RBS0 User Memory SpaceR3 Status Register Bit 7 ~ Bit 6 RBS1 ~ RBS0 R-Register page selectR5 System Control Register Bit 1 SIS Sleep and Idle mode selectSIS = 0 Idle mode SIS = 1 Sleep mode Bit 0 C Carry flag R4 RAM Select RegisterR7 Port 7 I/O Data Register RB Timer/Counter 4 Control RegisterBit Microcontroller R6 Port 6 I/O Data Register Bit 7 ~ Bit 0 P67 ~ P60 8-bit Port 6 I/O data registerFosc=8M RC Timer 4 Data BufferClock Source Resolution Max. Time TC4CK2 TC4CK1 TC4CK0RFInterrupt Status Flag Register Bit Microcontroller RE Interrupt Status Flag RegisterBit 7 TC3CAP Software capture control Bank 1 R5 TC3CR Timer/Counter 3 Control RegisterTC3M = 1 Capture mode Bank 1 R6 TC3DA Timer 3 Data Buffer a Bank 1 R7 TC3DB Timer 3 Data Buffer BBank 1 RB Adcr AD Control Register Bank 1 R9 TC2DH Timer 2 Data Buffer High ByteBank 1 RA TC2DL Timer 2 Data Buffer Low Byte TC2S = 0 Stop and counter clearBank 1 RD Addh AD High 8-bit Data Buffer Bit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable controlBit 5~ Bit 4 ADCK1 ~ ADCK0 AD Conversion Time Select Bank 1 RC Adic AD Input Pin ControlBit TEN = 0 Disable TEN = 1 EnableBit Microcontroller Bank 1 RE Tbktc TBT/Keytone Control Bank 2 R5 URC1 Uart Control RegisterTC2CK1 TC2CK0 Bank 2 R7 URS Uart Status RegisterBit 7 URRD8 Receiving data Bit BRATE2 BRATE1 BRATE0Bank 2 R9 Urtd Uart Transmit Data Buffer Bit 5 PRE Enable parity additionBit 6 Even Select parity check Even = 0 Odd parity Even = 1 Even parityBit 0 WBE Write buffer empty flag. Read only Bit 5 ~ Bit 3 BRS0 ~ BRS2 SPI Clock Source SelectBit 2 EDS Data shift out edge select EDS = 0 Rising edge EDS = 1 Falling edgeSPID7 SPID6 SPID5 SPID4 SPID3 SPID2 SPID1 SPID0 PHE6x = 1 Disable P6x pull highTransfer Mode Bank 3 RB PLC1 Pull Low Control RegisterSpecial Purpose Registers TC2ES = 0 Rising edge TC2ES = 1 Falling edge IOC6 ~ IOC9 − I/O Port Control RegisterIntcr − INT Control Register Address 0Bh INT1ES = 0 Rising edge INT1ES = 1 Falling edgeAdoscr − AD Offset Control Register Address 0Ch External InterruptCali Sign Uerrie Urie Utie Tbie EXIE1 TCIE0 IMR2 − Interrupt Mask Register 2 Address 0FhOperation Mode CPU Operation ModeRegisters for CPU Operation Mode Mode Switching ControlWake-up Methods Sleep Mode Idle ModeWake-up Signal R5 SIS = 1+SLEP R5 SIS= 0 + Slep Instruction AD ConverterConversion Time Operation Mode Max. Frequency Max. Conversion Rate per BitADC Data Register Sampling TimeAddress Name Bit Time Base Timer and Keytone GeneratorMUX Registers for Uart Circuit Uart Universal Asynchronous Receiver/TransmitterName Bit Transmitting Uart ModeBaud Rate Generator ReceivingRegisters for the SPI Circuit SPI Serial Peripheral InterfaceRbank Address Name Bit Serial Clock Shift Direction and Sample PhaseTransfer Mode Bit Transmit ModeBit Transmit/Receive Mode Bit Microcontroller Bit Receive ModeSCK pin Multiple Device Connect /SS SpisRegisters for Timer/Counter 2 Circuit Timer/CounterCounter Mode Timer ModeWindow Mode 21 Window Mode Timing Chart Registers for Timer/Counter 3 Circuit22 Configuration of Timer/Counter3 Capture ModeTCIF4 Registers for Timer 4 CircuitTCR4 PDO ModeTC4 Interrupt PWM Mode12 TCC/WDT & Prescaler Up-counterReset Reset and Wake-up13 I/O Ports Wake-up from Idle Mode Wake-up from Sleep ModeSummary of the Initialized Values for Registers Address Name Reset Type BitSCR Bit Microcontroller Register BankAddres URTD8 Events that may affect the T and P Status Reset TypeStatus of RST, T, and P of the Status Register Bit Microcontroller General Purpose RegistersInterrupt 28 Controller Reset Block DiagramSummary of Maximum Operating Speeds OscillatorOscillator Modes Crystal Oscillator/Ceramic Resonators Crystal740 EM78P312N 809N Oscillator Type Frequency Mode Frequency C1 pF C2 pFOS CI External RC Oscillator ModeBit 12 ~ 9 Not used Enwdtb = 0 Enable Enwdtb = 1 DisableCode Option Register Code Option Register WordOSC = 0 RC type OSC = 1 Crystal type Power-on ConsiderationsExternal Power-on Reset Circuit Customer ID RegisterEM78P809N Residue-Voltage ProtectionVdd EM78P312NBinary Instruction Hex Mnemonic Operation Status Instruction SetDEC Binary Instruction Hex Mnemonic Operation Status AffectedVss = Symbol Parameter Condition Min Typ Max UnitAbsolute Maximum Ratings Recommended Operating ConditionsTa= 25 C, VDD= 5.0V ± 5%, VSS= DC Electrical CharacteristicsTa= 25 C, VDD= 3.0V ± 5%, VSS= Varef Symbol Parameter Conditions Min Typ Max Unit AC Electrical CharacteristicTa=- 40C ~ 85 C, VDD=5V ± 5%, VSS=0V AC Test Input/Output Waveform Timing DiagramEM78P311SxY OTP MCUPackage Type Pin Count Package Size

8-Bit Microcontroller

OSCO

Fig. 5-30 Crystal/Resonator Circuit

Oscillator Type

Frequency Mode

Frequency C1 (pF) C2 (pF)

OSCI

740

EM78P312N809N

XTAL