Bit Microcontroller Bit Receive Mode, SCK pin | IBM EM78P312N

EM78P312N

8-Bit Microcontroller

(b)8-bit Receive Mode

Setting SPIM0 ~ SPIM1 to receive mode and setting SPIS to “1” to start receiving. The data are input sequentially from the SI pin in synchronous with the serial clock. When the final bit of transfer data has been received, the SPI interrupt is generated and SPIS is cleared to “0” by hardware. In order to receive the next data, the SPIS must be set to “1” again by software. If the current data is not read out from the data buffer, receiving is not started when using internal clock.

	shift start		shift start
RBF	shift finish
WBE
/SCK pin
SI pin	a0 a1 a2 a3 a4 a5 a6 a7		b0 b1 b2 b3 b4 b5 b6 b7
SPIF
SPID		a		b
		read data		read data
	Fig. 5-15	Receive Mode (8-bit, 1 word)

(c) 8-bit Transmit/Receive Mode

Set SPIM0 ~ SPIM1 to transmit/receive mode and write data to data buffer SPID. Set SPIS to “1” to start transferring. The data are output to the SO pin and input from the SI pin sequentially in synchronous with the serial clock. When the number of data words specified has been transferred, the SPI interrupt is generated and SPIS is cleared to “0” by hardware. In order to receive the next data, the SPIS must be set to “1” again by software. Writing data in transmit mode and reading data in receive mode use the same data buffer. If the current data is not read out from the data buffer and then write the data to data buffer, the transfer is not started when using internal clock. Always write the data to be transmitted after reading the received data.

Product Specification (V1.0) 10.03.2006

• 33

(This specification is subject to change without further notice)

Image 37

IBM EM78P312N manual Bit Microcontroller Bit Receive Mode, SCK pin, Bit Transmit/Receive Mode

Contents

DOC. Version EM78P312N Elan Microelectronics Corporation Contents 16.1 14.116.2 16.3 Bit Microcontroller General Description Pin Description Symbol Pin No Type Function Function Description Functional Block Diagram Operating Registers Operating Registers R1 Time Clock /Counter Bit Microcontroller R0 Indirect Addressing RegisterR2 Program Counter & Stack R3 Status Register User Memory SpaceBit 7 ~ Bit 6 RBS1 ~ RBS0 R-Register page select RBS1 RBS0 SIS = 0 Idle mode SIS = 1 Sleep mode Bit 1 SIS Sleep and Idle mode selectBit 0 C Carry flag R4 RAM Select Register R5 System Control Register Bit Microcontroller R6 Port 6 I/O Data Register RB Timer/Counter 4 Control RegisterBit 7 ~ Bit 0 P67 ~ P60 8-bit Port 6 I/O data register R7 Port 7 I/O Data Register Clock Source Resolution Max. Time RC Timer 4 Data BufferTC4CK2 TC4CK1 TC4CK0 Fosc=8M RFInterrupt Status Flag Register Bit Microcontroller RE Interrupt Status Flag Register TC3M = 1 Capture mode Bank 1 R6 TC3DA Timer 3 Data Buffer a Bank 1 R5 TC3CR Timer/Counter 3 Control RegisterBank 1 R7 TC3DB Timer 3 Data Buffer B Bit 7 TC3CAP Software capture control Bank 1 RA TC2DL Timer 2 Data Buffer Low Byte Bank 1 R9 TC2DH Timer 2 Data Buffer High ByteTC2S = 0 Stop and counter clear Bank 1 RB Adcr AD Control Register Bit 5~ Bit 4 ADCK1 ~ ADCK0 AD Conversion Time Select Bit 7 ~ Bit 0 ADE7 ~ ADE0 AD input pin enable controlBank 1 RC Adic AD Input Pin Control Bank 1 RD Addh AD High 8-bit Data Buffer Bit Microcontroller Bank 1 RE Tbktc TBT/Keytone Control TEN = 0 Disable TEN = 1 EnableBank 2 R5 URC1 Uart Control Register Bit Bit 7 URRD8 Receiving data Bit Bank 2 R7 URS Uart Status RegisterBRATE2 BRATE1 BRATE0 TC2CK1 TC2CK0 Bit 6 Even Select parity check Bit 5 PRE Enable parity additionEven = 0 Odd parity Even = 1 Even parity Bank 2 R9 Urtd Uart Transmit Data Buffer Bit 2 EDS Data shift out edge select Bit 5 ~ Bit 3 BRS0 ~ BRS2 SPI Clock Source SelectEDS = 0 Rising edge EDS = 1 Falling edge Bit 0 WBE Write buffer empty flag. Read only Transfer Mode PHE6x = 1 Disable P6x pull highBank 3 RB PLC1 Pull Low Control Register SPID7 SPID6 SPID5 SPID4 SPID3 SPID2 SPID1 SPID0 Special Purpose Registers Intcr − INT Control Register Address 0Bh IOC6 ~ IOC9 − I/O Port Control RegisterINT1ES = 0 Rising edge INT1ES = 1 Falling edge TC2ES = 0 Rising edge TC2ES = 1 Falling edge Adoscr − AD Offset Control Register Address 0Ch External InterruptCali Sign Uerrie Urie Utie Tbie EXIE1 TCIE0 IMR2 − Interrupt Mask Register 2 Address 0Fh Registers for CPU Operation Mode CPU Operation ModeMode Switching Control Operation Mode Wake-up Signal R5 SIS = 1+SLEP R5 SIS= 0 + Slep Instruction Sleep Mode Idle ModeAD Converter Wake-up Methods ADC Data Register Operation Mode Max. Frequency Max. Conversion Rate per BitSampling Time Conversion Time Address Name Bit Time Base Timer and Keytone Generator MUX Registers for Uart Circuit Uart Universal Asynchronous Receiver/TransmitterName Bit Transmitting Uart Mode Baud Rate Generator Receiving Registers for the SPI Circuit SPI Serial Peripheral InterfaceRbank Address Name Bit Transfer Mode Shift Direction and Sample PhaseBit Transmit Mode Serial Clock Bit Transmit/Receive Mode Bit Microcontroller Bit Receive ModeSCK pin Multiple Device Connect /SS Spis Registers for Timer/Counter 2 Circuit Timer/Counter Counter Mode Timer ModeWindow Mode 21 Window Mode Timing Chart Registers for Timer/Counter 3 Circuit 22 Configuration of Timer/Counter3 Capture Mode TCIF4 Registers for Timer 4 Circuit TCR4 PDO Mode 12 TCC/WDT & Prescaler PWM ModeUp-counter TC4 Interrupt Reset Reset and Wake-up13 I/O Ports Wake-up from Idle Mode Wake-up from Sleep Mode Summary of the Initialized Values for Registers Address Name Reset Type Bit SCR Bit Microcontroller Register Bank Addres URTD8 Status of RST, T, and P of the Status Register Reset TypeBit Microcontroller General Purpose Registers Events that may affect the T and P Status Interrupt 28 Controller Reset Block Diagram Oscillator Modes OscillatorCrystal Oscillator/Ceramic Resonators Crystal Summary of Maximum Operating Speeds 740 EM78P312N 809N Oscillator Type Frequency Mode Frequency C1 pF C2 pF OS CI External RC Oscillator Mode Code Option Register Enwdtb = 0 Enable Enwdtb = 1 DisableCode Option Register Word Bit 12 ~ 9 Not used External Power-on Reset Circuit Power-on ConsiderationsCustomer ID Register OSC = 0 RC type OSC = 1 Crystal type Vdd Residue-Voltage ProtectionEM78P312N EM78P809N Binary Instruction Hex Mnemonic Operation Status Instruction Set DEC Binary Instruction Hex Mnemonic Operation Status Affected Absolute Maximum Ratings Symbol Parameter Condition Min Typ Max UnitRecommended Operating Conditions Vss = Ta= 25 C, VDD= 5.0V ± 5%, VSS= DC Electrical Characteristics Ta= 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 Diagram Package Type OTP MCUPin Count Package Size EM78P311SxY