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NEC PD75P402, PD75402A user manual SBI definition, SB0 ACK, SB0 C0 ACK Busy, SB0 D0 ACK Busy

Models: PD75402A PD75P402

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS

(2) SBI definition

The SBI serial data format and the meaning of the signals used are explained in the following section. Serial data transmitted via the SBI is classified into three types: Commands, addresses and data. Serial data forms a frame with the configuration shown below.

Address, command and data transfer timing is shown in Fig. 5-33.

Fig. 5-33 SBI Transfer Timing

Address Transfer

SCK8 9

SB0

A7

A0

ACK

BUSY

Bus Release

Signal

Command Transfer

Command Signal

SCK9

SB0

C7

C0 ACK

BUSY

READY

Data Transfer

SCK8 9

SB0

D7

D0 ACK

BUSY

READY

The bus release signal and command signal are output by the master. The BUSY signal is output by the slave. ACK can be output by either the master or slave (normally output by the 8-bit data receiver).

The serial clock is output by the master continuously from the start of an 8-bit data transfer until BUSY is released.

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NEC PD75P402, PD75402A user manual SBI definition, SB0 ACK, SB0 C0 ACK Busy, SB0 D0 ACK Busy

Contents

ΜPD75402A Page Major Revisions in This Version Instruction Functions and Application Content to be read carefullyRemarks Other Related Documents Related Documentation Device Related DocumentsDevelopment Tool Related Documents Latest documents should be used for design purposes, etcContents Digital INPUT/OUTPUT Ports Basic Interval TimerInterrupt Control Circuit Configuration Clock Generation CircuitOperation After Standby Mode Reset Standby Mode Setting and Operation StatesStandby Mode Reset Standby Mode ApplicationContents of Figures Fig. No Title Contents of Tables Table No TitleFAX PPC GeneralECR VCR General Outline of Functions For details, see Interrupt FunctionsOrdering Information General Ordering Information and Quality GradeQuality Grade VPP INT0 Interrupt INT2 Control Block DiagramPORT0 PORT1 PORT2 PORT3 PORT5 PORT6SO/SB0 General PIN ConfigurationSCK VPP NCProm mode P01/SCK 2 44-Pin Plastic QFP 10mm Normal operating modeNC NC NC P50 NC V SS NC P22/PCLA2 NC NC NC NC PIN Functions SO/SB0 ΜPD75402A PIN Function List Port Pin ListSCK INT0SCK SB0 PIN Functions Normal Operating Mode Port 0’s, 1’s Dual-Function Pins5 INT2 ..... Port 1 Dual-Function Input 4 INT0 ..... Port 1 Dual-Function InputPCL ..... Port 2 Dual-Function Output Reset Reset 7 X1, X2 CrystalOE Output Enable ..... Input PIN Functions Prom ModeCE Chip Enable ..... Input 1 A0 to A14 Address ..... InputRemarks a circle PIN Functions PIN INPUT/OUTPUT CircuitsPin Input/output Types P22/PCLOUT IN/OUTType F B Type M a P00, Reset PIN Functions Unused PIN TreatmentFeatures of Architecture and Memory MAP Data Memory Bank ConfigurationFbfh FB0HFF0H Fffh Addressing Mode List @HLBit direct addressing mem.bit Data Memory Addressing ModesBit direct addressing mem Bit register indirect addressing @HL Specific address bit manipulation addressing fmem. bit Push HL POP Stack addressingSUB Push POP RET Push HL Push XA RETFeatures of Architecture and Memory MAP MEMORY-MAPPED I/O Applicable Addressing Modes at Peripheral Hardware OperationΜPD75402A I/O Map 1/2 ΜPD75402A I/O Map 2/2 Program Counter PC .... Bits Internal CPU FunctionsPC1 PC0 Program Memory ROM .... ,920 Words × 8 Bits Program Memory MapGeneral register area Internal CPU Functions Data Memory RAMData area Stack areaPeripheral hardware area General Register Configuration Internal CPU Functions General Register .... × 4 BitsInternal CPU Functions Accumulator AccumulatorsMOV SP, XA Internal CPU Functions Stack Pointer SP .... BitsRange of 020H to 03FH SP4 SP3 SP2 SP1 SP0Data Saved to Stack Memory IST0 PSWCarry flag CY Internal CPU Functions Program Status Word PSW .... BitsCarry Flag Manipulation Instructions Skip flag SK2, SK1, SK0 Interrupt Status Flag Indication ContentSET1 Interrupt status flag IST0Peripheral Hardware Functions PORT0Digital Input/Output Port Types and Characteristics PO1 Csim PogaPO0 INT2 INT0Configuration of Port PO3Configuration of Ports 2 Input/Output Mode Setting PM5 PmgbPmga Digital Input/Output Port Handling InstructionsFech PM5 PM2 Pmgb Bit handling instructions Operations when output mode is set Operations when input mode is setDigital Input/Output Port Operations Operations with Input/Output Port Handling Instructions Internal Pull-Up Resistor Specification for Each Port Internal Pull-up ResistorsPORT1 MOV POGA, XAFdch PO6 PO3 PO2 PO1 PO0 Data latching by 1-machine-cycle instruction Digital Input/Output Port Input/Output TimingData fetch by 2-machine-cycle instruction Data latching by 2-machine-cycle instructionClock Generation Circuit Configuration Peripheral Hardware Functions Clock Generation CircuitSEL Clock Generation Circuit Function and OperaionProcessor clock control register PCC MOV PCC, aFB3H PCC3 PCC2 PCC1 PCC0 PCCSystem clock oscillation circuit 12 System Clock Oscillation Circuit External Circuitry13 Example of Poor Resonator Connection Circuit 2/2 Use of Variable Minimum Instruction Execution Time Function CPU Clock SettingExample 15 Change of Φ after Power-On Reset Maximum Time Required for Change of CPU ClockDifferences Between μPD75402A and μPD75402 17 μPD75402 Processor Clock Control Register Format FB3H PCC3 PCC2 PCC1Peripheral Hardware Functions Clock Output Circuit Clock Output Circuit ConfigurationP22/PCL CLOM3 CLOM1 CLOM0 Clom PORT2.2 Clock Output Mode Register Clom ClomClock Output Procedure Examle of Remote Control ApplicationMPX Peripheral Hardware Functions Basic Interval TimerBasic Interval Timer Configuration BTM3 BTM2BTM3 Basic Intercal Timer Mode Register BTMMOV BTM. a BTMBasic Interval Timer Operation From the beginningIebt Examples of Basic Interval Timer ApplicationsMOV BTM,A SEL MOVPeripheral Hardware Functions Serial Interface Operation-halted modeWire serial I/O mode Serial Interface FunctionsSBI mode serial bus interface mode Serial Interface ConfigurationSerial Interface Block Diagram FunctionsShift register SIO Serial operating mode register CsimSerial bus interface control register Sbic SO latchIntcsi control circuit Register Functions Serial operating mode register CsimSerial clock control circuit Serial clock selection bit W Serial interface operating mode selection bit WCsie COI WUP CSIM3 CSIM1 Csim Signal from address comparator R CsieCsie CSIM3 MOV CSIM, XASET1 Csie Csie CSIM1FE2H Cmdd Reld Cmdt ReltBus release detection flag R Command trigger bit WCommand detection flag R Acknowledge trigger bit WBusy enable bit R/W Acknowledge detection flag RCLK SIOBUSY/ACK Slave address register SVA Error detectionSee 5.5.6 8 Error detection for details Slave address detectionRegister setting Csie C0I WUP CSIM3 CSIM1 Csim5 3-Wire Serial I/O Mode Operation 28 Example of 3-Wire Serial I/O System ConfigurationRemarks Figuer Apply to fXX = 4.19 MHz operation Shift register data do not match Register data match Command trigger bit FE2H Bsye Ackd Acke Ackt Cmdd Reld Cmdt Relt Sbic29 3-Wire Serial I/O Mode Timing Communication operationSerial clock selection Serial Clock Selection and Use in 3-Wire Serial I/O ModeSignals Relt CmdtData transfer order Start of transferMOV SIO, XA Wire serial I/O mode applicationsMOV XA, Tdata SCK SO/SB0MOV XA, Tdata XCH XA, SIO MOV XA, Tdata SIO, XAIecsi MOV RDATA, XACPU SB0 SCK SBI Mode Operation+ VDD SB0 SCKBusy signal Busy control function Address/command/data differentiation functionAcknowledge signal ACK control function SBI functionsSB0 C0 ACK Busy SBI definitionSB0 ACK SB0 D0 ACK BusySCK H Bus release signal RELCommand signal CMD SCK H SB0Address 37 Slave Selection by AddressCommand & data DataAcknowledge signal ACK SCK SB0 ACK100 Busy signal BUSY, ready signal ReadySCK SB0 ACK Busy 101 102 103 104 Serial Clock Selection and Use in SBI Mode 105SIO SCK SB0 Relt Cmdt Reld Cmdd RELT, CMDT, Reld & Cmdd Operation Slave106 SIO SCK44 Ackt Operation 107When Acke = 1 interval is short When Acke is set after completion of transferWhen Acke = 0 on completion of transfer 108SCK SB0 ACK Ackd When ACK signal is output after 9th SCK clock interval109 SCK SB0 Bsye ACKSB0 ACK Ready 110 Signals in SBI ModeSCK Cmdd SB0 Ready111 REL CMDPin configuration Pin Configuration DiagramUse of slave address register SVA Address match detection method113 Peripheral 114Chapter Hardware50 Command Transmission from Master Device to Slave 115116 51 Data Transmission from Master Device to Slave Device52 Data Transmission from Slave Device to Master Device 117Points to note concerning SBI mode 118Serial bus configuration SBI mode application119 Ii Communication procedure Description of commands Command types120 ➁ WRITE, END and Stop commands Iii Command formats➀ Read command 121MSM 122ACK Stop Status ➂ Status command123 MSB LSB124 Reset command➄ Chgmst command ChgmstErrors generated on the master side Iv Error occurrenceErrors generated on the slave side 125Interrupt Functions 127 VEN T1 GOT OBT Interrupt Functions Interrupt Source Types and Vector TableInterrupt Request Source Types VENT1 Gotobt VENT2 GOTO0Example EI Interrupt request flag & interrupt enable flagInterrupt Request Flag Setting Signal IE0External interrupt input pin hardware 130INT0 Noise Elimination Circuit Input/Output Timing INT2 Input Noise EliminationFB4H IM03 Interrupt master enable flag IME132 FB2HIST0 Interrupt Servicing Status Interrupt status flag133 YES Interrupt Functions Interrupt SequenceIME=1 Interrupt INTxxx generation 136 Interrupt enabling/disabling Interrupt Functions Interrupt ApplicationsEI Iecsi CLR1 IRQ0 Example using INTBT, INT0 falling edge active, and Intcsi138 ➄ Reti➂ Intcsi Reti 139EI IE0 ➃ EI Iecsi Reti140 Pending interrupt executionINT0 Intcsi ➁ Reti Halt mode Stop modeStandby Function Standby Function Standby Mode Setting and Operation States Standby Mode Operation StatesHalt mode reset by Reset input Standby Function Standby Mode ResetStop mode reset by Reset input Halt mode reset by interrupt generation144 HaltStandby Function Operation After Standby Mode Reset IME =Reset Signal Acceptance Reset at Power-on147 State of Hardware after ResetOFF Architecture and Memory MAP 148Stack Instructions Instruction SET Special InstructionsBit Manipulation Instructions Example A0Addc Base Correction InstructionsBase correction at addition Adds AddcOperation identifier and description Instruction SET Instruction SET and ITS OperationOperation description legend Description of machine cycle field Description of addressing area field symbols152 Addc Movt XA, @PCXAAdds XOR154 155 Instruction GroupInstructions NOPBit manipulation addressing operation code Description of operation code symbolsInstruction SET Operation Code of Each Instruction Iebt Iecsi IE0 IE2Rorc Not Incs SET CLR SKT NotRET Rets Reti Push POP Halt Stop NOPMOV A, #0BH Instruction SET Instruction Functions and ApplicationMove Instructions MOV HL, #5FHMOV XA, 20H 160MOV XCH Loop XCH161 162 Table Reference InstructionsTable data on that 02FFHSee section Arithmetic and Logic Instructions163 Or A, @HL 164Rorc a 165Incs reg 166SKE reg, #n4 167Carry Flag Operation Instructions 168Bit Manipuration Instructions 169SKF mem. bit 170BR addr 171Subroutine Stack Control Instructions 172Push rp 173Interrupt Control Instructions 174Input/Output Instructions 175Halt 176177 178 Prom Writing Tools Language Processor179 Debugging Tools 180181 Development Tool ConfigurationIBM PC/AT 182 183 Pmgb Cmdd 184Irqcs Port