Xchd Exchange and Decrement, Xchd Operation | Samsung KS57C2308

KS57C2308/P2308/C2316/P2316	SAM47 INSTRUCTION SET

XCHD — Exchange and Decrement

XCHD Operation:

dst,src

Operand	Operation Summary	Bytes	Cycles

A,@HL	Exchange A and data memory contents; decrement	1	2 + S
	contents of register L and skip on borrow

Description: The instruction XCHD exchanges the contents of the accumulator with the RAM location addressed by register pair HL and then decrements the contents of register L. If the content of register L is 0FH, the next instruction is skipped. The value of the carry flag is not affected.

Operand			Binary Code						Operation Notation

A,@HL	0	1	1	1	1	0	1	1	A ↔ (HL), then L ← L–1;
									skip if L = 0FH

Example: Register pair HL contains the address 20H and internal RAM location 20H contains the value 0FH:

	LD	HL,#20H
	LD	A,#0H
	XCHD	A,@HL	; A ← 0FH and L ← L – 1, (HL) ← "0"
	JPS	XXX	; Skipped since a borrow occurred
	JPS	YYY	; H ← 2H, L ← 0FH
YYY	XCHD	A,@HL	; (2FH) ← 0FH, A ← (2FH), L ← L – 1 = 0EH
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The “JPS YYY” instruction is executed since a skip occurs after the XCHD instruction.

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Samsung KS57C2308 manual Xchd Exchange and Decrement, Xchd Operation, YYY Xchd @HL

Contents

Overview Product Overview Bit Basic Timer PinsBit Timer/Counter Watch Timer Block Diagram KS57C2308 INT0 INT4INT1 INT2 Test Test signal input must be connected to V SS PIN Circuit Diagrams Pin Circuit Type E P4, P5 Overview Address SpacesGeneral-Purpose Program Memory Vector Addresses Vector Address Area GENERAL-PURPOSE Memory AreasEMB ERB PC9 PC8 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 + Programming TIP Defining Vectored Interrupts Instruction Reference Area + Programming TIP Using the REF Look-Up Table Data Memory RAM F80H-FFFH Memory Banks 0, 1,Data Memory Addressing Modes Working Registers Ramclr SMB + Programming TIP Clearing Data Memory Banks 0RMCL1 @HL,A Incs SMB RMCL0 @HL,A Incs Working Register Map Working Registers Paired Working Registers Working Register Banks Special-Purpose Working Registers INT0 Push + Programming TIP Selecting the Working Register AreaSRB Incs WX,EA YZ,EA POP SP3 SP2 SP1 Stack Pointer SPSP7 SP6 SP5 SP4 + Programming TIP Initializing the Stack Pointer Push Instructions Push OperationsCall Instructions Interrupt Routines POP Instructions POP OperationsRET and Sret Instructions Iret Instructions BSC Register Organization Name Address Bit MSB LSB FB0H IS1 IS0 EMB ERB FB1H SC2 SC1 SC0 Program Counter PC Interrupt Status Flag Bit Settings Interrupt Status Flags IS0, IS1IS1 IS0 EMB Flag EMB + Programming TIP Using the EMB Flag to Select Memory Banks HL,EA ERB Flag ERB Skip Condition Flags SC2, SC1, SC0 Carry Flag CValid Carry Flag Manipulation Instructions Operation Type HL,#0AAH ADC EA,HLBand Address Spaces Addressing Modes RAM Address Structure Reset Bitr EMB EMB and ERB Initialization Values+ Programming TIP Initializing the EMB and ERB Flags Enable Memory Bank Settings EMB =EMB-Independent Addressing Select Memory Bank SMB Instruction Select Bank Register SB Direct and Indirect Addressing BIT AddressingBank Mapping Bit Indirect Addressing @WL @HLAdata EQU Bdata EQU 8EH SMB HL,#BDATA WX,#ADATA Comp @WL Bdata EQUCpse @HL Sret Decs Comp RET HL,#BDATA WX,#ADATA Trans @WL Bit Indirect Addressing ExampleXchd @HL SMB HL,#BDATA WX,#ADATA Trans @WL SMB ADATA,EA EA,P4BDATA,EA Bdata EQU 8EH SMB EA,P4 SMB HL,#ADATA EA,@HL HL,#ADATA EA,@HL MAP for Hardware Registers Memory MAP I/O Map for Memory Bank Addressing Mode Register Bit FB8H INT a IE4 IRQ4 IEB Irqb FB7H ScmodFbah INT B IEW Irqw Fbch INT C IET0 IRQT0 Register Descriptions Register Description Format Bmod Basic Timer Mode Register Read/Write Bit Addressing Basic Timer Restart BitBit Identifier Clmod Clock Output Mode Register FD0HClock Source and Frequency Selection Control Bits IE0, 1, IRQ0, 1 INT0, 1 Interrupt Enable/Request Flags FbehIE1 IRQ1 IE0 IRQ0 IE2, IRQ2 INT2 Interrupt Enable/Request Flags FbfhIE2 IRQ2 IEB, Irqb Intb Interrupt Enable/Request Flags IE4, IRQ4 INT4 Interrupt Enable/Request FlagsFB8H IE4 IRQ4 IEB Irqb Ints Interrupt Enable Flag IES, Irqs Ints Interrupt Enable/Request FlagsFbdh IES Irqs INTT0 Interrupt Enable Flag IET0, IRQT0 INTT0 Interrupt Enable/Request FlagsFbch IET0 IRQT0 Intw Interrupt Enable Flag IEW, Irqw Intw Interrupt Enable/Request FlagsFbah IEW Irqw IMOD0 External Interrupt 0 INT0 Mode Register External Interrupt Mode Control BitsFB4H FB5H IMOD1 External Interrupt 1 INT1 Mode RegisterIMOD1.0 External Interrupt 1 Edge Detection Control Bit FB6H IMOD2 External Interrupt 2 INT2 Mode RegisterIMOD2.2 IMOD2.1 IMOD2.0 External Interrupt 2 Edge Detection Selection Bit IPR Interrupt Priority Register Interrupt Master Enable BitFB2H IME Lcon LCD Output Control Register LCD Clock Output Disable/Enable BitF8EH Read/Write Bit Addressing LCD Bias Selection Bit F8DH, F8CH Lmod LCD Mode RegisterLCD Clock Lcdck Frequency Selection Bits Duty and Bias Selection for LCD Display Read/Write Bit Addressing CPU Operating Mode Control Bits Pcon Power Control RegisterFB3H CPU Clock Frequency Selection Bits FE9H, FE8H PMG1 Port I/O Mode Flags Group 1 Port 3 PMG2 Port I/O Mode Flags Group 2 Port 2, 4, 5, FEDH, FechPM7 PM5 PM4 PM2 FD7H, FD6H PNE N-Channel Open-Drain Mode Register PSW Program Status Word FB1H, FB0HSC2-SC0 SC1 IS1 IS0 EMB ERB Pumod Pull-Up Resistor Mode Register FDDH, FdchPUR7 PUR6 PUR5 PUR4 PUR3 PUR2 PUR1 PUR0 Scmod System Clock Mode Control Register FB7H1Bit FE1H, FE0H Smod Serial I/O Mode Register Timer/Counter 0 Input Clock Selection Bits TMOD0 Timer/Counter 0 Mode Register F91H, F90HEnable/Disable Timer/Counter 0 Bit Clear Counter and Resume Counting Control Bit Timer/Counter 0 Output Enable Flag TOE Timer Output Enable Flag RegisterTOE0 Bit3 Watchdog Timer Counter Clear Flag Wdflag Watchdog Timer Counter Clear Flag RegisterF9AH Wdtcf Watchdog Timer Enable/Disable Control Wdmod Watchdog Timer Mode Register F99H, F98HWdmod 5AH Wmod Watch Timer Mode Register F89H, F88H SAM47 Instruction SET Instruction SET Features Instruction Reference Area Bitr EMB Reducing Instruction Redundancy Flexible Bit Manipulation Instructions Which Have Skip ConditionsInstructions Which Affect the Carry Flag ADC and SBC Instruction Skip Conditions ADC A,@HLSBC A,@HL Symbols and Conventions Data Type Symbols Instruction Operand Notation Symbol DefinitionRegister Identifiers Full Register Name Opcode Definitions Direct Register Opcode DefinitionsOpcode Definitions Indirect Register @HL @WX @WL HIGH-LEVEL Summary Stop IdleCpse EA,RR EA,DA XCHXchi @HL DA,A ADC @HL COMADS SBC @HL Bitr Btstz Binary Code Summary SCF RCF CCF First Byte Condition PC13-8 ← SP + 1 SP Ra,#im Ra ← im RR,#imm RR ← imm EA,RR EA ← EA and RR EA,RR EA ← EA or RREA,RR EA ← EA XOR RR ← a + HL + C Skip if C = FB0H-FBFH FF0H-FFFH Second Byte Bit Addresses LDB Instruction Descriptions ADC ADC Add With CarryOperation Operand Operation Summary Bytes Cycles Operand Binary Code Operation Notation #8H ← 8H ADS ADS Add And Skip On OverflowADS EA,HL JPS YYY EA ← 0C3H + 12H = 0D5H Logical Band Band Bit LogicalSMB Band Band C,P1.@L Band @H+FLAG Flag EQU Bitr Bitr Bit ResetFF1H-FF9H Bitr P2.0 Incs BP2 BP2 Bitr Bits Bit Set BitsBits P2.0 BP2 Bits BOR BOR Bit Logical or BOR @H+FLAG Btsf Btsf Bit Test and Skip on FalseLABEL2 LABEL3 RET Incs BP2 BP2 Btsf Btst Btst Bit Test and Skip on True BP2 Btst Btstz Bit Test and Skip on True Clear Bit BtstzBP2 Btstz Bits @H+FLAG Btstz @H+FLAG Bxor Bit Exclusive or BxorRCF Bxor C,P1.0 Bxor @H+FLAG Call Call Procedure Call OperationOperand Operation Summary Bytes Cycles Calls Operation Calls Call Procedure ShortCalls Play 0FFH 0FEH EMB, ERB 0FDH 0FCH 0FBH 0FAH CCF CCF Complement Carry Flag COM Complement Accumulator COMCOM a Cpse Compare and Skip if Equal CpseCpse EA,HL RET Decs Decs Decrement and Skip on BorrowDecs HL Call PLAY1 DI Disable Interrupts EI Enable Interrupts Idle Idle Operation IdleIdle NOP Incs Increment and Skip on Carry IncsIncs @HL Iret Iret Return From InterruptIS1 IS0 EMB ERB SC2 SC1 SC0 JP Operation JP JumpADR14 Jump to direct address 14 bits JPS Operation JPS Jump ShortADR12 Jump direct in page 12 bits JR Jump Relative Very Short JPS AAA BBB CCC DDD JR KKEA,WX ADS WX,EA JPS YYY XXX LD LD Load Description Operand Binary Code Operation Notation Instruction Operation Description and Guidelines Examples Instruction Operation Description and Guidelines LDB LDB Load Bit LDB @H+FLAG FlagFlag EQU 20H.3 RCF LDB @H+FLAG,C LDC LDC Load Code ByteCall Display JPS Main ORG Display LDC Display LD ORG 01FDH01FFH LDC LDD Operation LDD Load Data Memory and Decrement LDI Load Data Memory and Increment LDI OperationHL,#2FH LDI @HL NOP No Operation NOPStop NOP Or EA,@HL Or Logical or POP Pop From Stack POPPOP HL Push Push Onto Stack PushPush HL RCF RCF Reset Carry Flag REF Reference Instruction OperationOperand Operation Summary Bytes Cycles Memc Reference code BBB EA,#FFH CCC Tcall SUB1 DDD TJP SUB2 BBB EA,#FFH CCC Call SUB1 DDD SUB2AAA LD HL,#0FH Opcode Symbol InstructionTcall SUB1 TJP SUB2 ORG RET Return From Subroutine RETPSW ← EMB,ERB RRC Rotate Accumulator Right Through Carry RRCRRC a SBC SBC Subtract With CarrySCF SBC EA,HL RCF SBC EA,HL #8H SBS SBS SubtractRCF SBS EA,HL SCF SBS EA,HL SCF SCF Set Carry Flag SMB SMB Select Memory BankAddresses Register Areas Bank Format Binary Code Operation Notation ERB Setting SRB Settings Selected Register Bank SRB Select Register BankSRB Sret Sret Return From Subroutine and Skip Stop Stop Stop Operation VENTn Vent Load EMB, ERB, and Vector Address VENTn Example The instruction sequence XCH Exchange a or EA with Nibble or Byte XCHXCH EA,@HL Xchd Exchange and Decrement Xchd OperationYYY Xchd @HL Xchi Operation Xchi Exchange and IncrementHL,#2FH YYY Xchi @HL XOR Logical Exclusive or XORXOR EA,HL SAM47 Instruction SET Oscillator Circuits Interrupts Power-Down Page CPU Clock Notation Oscillator Circuits Clock Control Registers Using a Subsystem Clock STO Clock Circuit Diagram Subsystem Oscillator Circuits Main System Oscillator Circuits Pcon Bit Settings Resulting CPU Operating Mode Power Control Register PconPCON.1 PCON.0 SCMOD.0 = + Programming TIP Setting the CPU Clock PCON,AInstruction Cycle Times FB7H SCMOD.3 SCMOD.2 SCMOD.0 Scmod System Clock Mode Register ScmodSCMOD.3 SCMOD.2 SCMOD.0 Fx Oscillation Fxt Oscillation Oscillator CIRCUITSKS57C2308/P2308/C2316/P2316 KS57C2308/P2308/C2316/P2316OSCILLATOR Circuits Switching the CPU Clock Elapsed Machine Cycles During CPU Clock Switch Result of CLMOD.3 Setting Clock Output Mode Register ClmodCLMOD.1 CLMOD.0 Clock Source Frequency Clock Output Circuit Clock Output Procedure + Programming TIP CPU Clock Output to the CLO Pin PMG2,EACLMOD,A Interrupts Interrupt Types and Corresponding Port Pins Interrupt NameINT0, INT1, INT4 INTB, INTT0, Ints Vectored Interrupts Power-Down Mode ReleaseSoftware-Generated Interrupts Multiple Interrupts Interrupt Execution Flowchart Interrupt Control Circuit Diagram Two-Level Interrupt Handling Multiple Interrupts Multi-Level Interrupt Handling Interrupt Priority Register Settings Standard Interrupt Priorities Default PriorityResult of IPR Bit Setting Interrupt Priority Register IPR IMOD1 IMOD1.0 IMOD0 IMOD0.3 IMOD0.1 IMOD0.0 INT0 Noise Filter Edge Clock Selector External INTERRUPT0 and INTERRUPT1 Mode RegistersINT1 IMOD0 IRQ0 IRQ1 Edge IMOD1 IMOD2 Register Bit Settings External Interrupt 2 Mode Register IMOD2Effect of IMOD2 Settings FB6H IMOD2.2 IMOD2.1 IMOD2.0 Circuit Diagram for INT2 and KS0-KS7 Pins IME IPR.2 IPR.1 IPR.0 Interrupt Flags Interrupt Request Flags IRQx + Programming TIP Enabling the Intb and INT4 Interrupts Intb Btstz IrqbIret INT4 Bitr IRQ4 POWER-DOWN CPU Stop Idle Timing When Idle Mode is Released by Reset Idle Mode Timing Diagrams Timing When Stop Mode is Released by Reset Stop Mode Timing Diagrams P2,EA Keyclk Call MA2SUBIMOD2,A SMB Bitr Irqw IRQ2 Bits IEW IE2 CLKS1 Call Watdis Port PIN Configuration for POWER-DOWN P3.1/LCDSY Recommended Connections for Unused PinsP3.0/LCDCK SEG0-SEG23 POWER-DOWN Timing for Oscillation Stabilization After Reset Program Status Word PSW Hardware Register Values After ResetData Memory RAM Clocks Timer/Counters 0 Basic TimerWatchdog Timer LCD Driver/Controller KS57C2308/P2308/C2316/P2316 Pull-Up Resistor Mode Register Pumod Port Mode FlagsChannel Open-Drain Mode Register PNE 10 I/O Ports P6,EA Port Mode Flags PM Flags PULL-UP Resistor Mode Register PumodPumod ID LMOD.7 and LMOD.6 Setting for Port 8 Output Control Channel OPEN-DRAIN Mode Register PNELCD Output Segments Bit Output Pins PIN Addressing for Output Port SEG25 SEG241FAH SEG26 1FBH SEG27 Port 0 Circuit Diagram Port 0 Circuit Diagram IMOD0 IMOD1 Port 1 Circuit Diagram Port 2 Circuit Diagram Port 2 Circuit Diagram Port 3 and 6 Circuit Diagram Port 3 and 6 Circuit Diagram Port 4 and 5 Circuit Diagram Port 4 and 5 Circuit Diagram Port 7 Circuit Diagram Port 7 Circuit Diagram 10-12 KS57C2308/P2308/C2316/P2316 Timers and TIMER/COUNTERS Interval Timer Function Watchdog Timer FunctionOscillation Stabilization Interval Control Addressing Reset Name Mode Basic Timer Register Overview Type Description SizeRAM Wdtcf Basic Timer Mode Register Bmod Organization Basic Timer Mode Register BmodBasic Timer Input Clock Interval Time BMOD.3 Basic Timer Operation Sequence Basic Timer Counter Bcnt + Programming TIP Using the Basic Timer Watchdog Timer Counter Wdcnt Watchdog Timer Mode Register WdmodWatchdog Timer Counter Clear Flag Wdtcf Bmod + Programming TIP Using the Watchdog Timer Reset Bits EMB SMBBMOD,A Main Bits Wdtcf TC0 Function Summary BIT TIMER/COUNTER 0 TC0 TC0 Component Summary TC0 Register Overview Type Description Size TC0 Circuit Diagram TC0 ENABLE/DISABLE Procedure Enable Timer/CounterDisable Timer/Counter TC0 Operation Sequence TC0 Programmable TIMER/COUNTER Function TC0 Event Counter Function TMOD0 Settings for TCL0 Edge DetectionTMOD0.5 TMOD0.4 TCL0 Edge Detection TC0 Clock Frequency Output + Programming TIP TC0 Signal Output to the TCLO0 PinTREF0,EA EA,#4CH TMOD0,EA Bits TOE0 TC0 External Input Signal Divider TC0 Serial I/O Clock GenerationTREF0,EA EA,#0CH TMOD0,EA TC0 Mode Register TMOD0 TMOD0.6 TMOD0.5 TMOD0.4 TMOD0.6, TMOD0.5, and TMOD0.4 Bit SettingsResulting Counter Source and Clock Frequency + Programming TIP Restarting TC0 Counting Operation TC0 Counter Register TCNT0 TC0 Timing Diagram TC0 Reference Register TREF0 TC0 Output Enable Flag TOE0MSB LSB TC0 Output Latch TOL0 TREF0,EA + Programming TIP Setting a TC0 Timer Interval Using a System or Subsystem Clock Source Real-Time and Watch-Time MeasurementClock Source Generation for LCD Controller Timing Tests in High-Speed Mode Check Subsystem Clock Level FeatureBuzzer Output Frequency Generator Watch Timer Circuit Diagram Watch Timer Mode Register Wmod + Programming TIP Using the Watch Timer WMOD,EA Bits IEWClock Btstz Irqw Data BUS LCD Controller Driver LCD CONTROLLER/DRIVER LCD Circuit Diagram LCD Circuit Diagram LCD RAM Address Area LCD Control Register Lcon LCON.0 and LMOD.3 Bit SettingsLCON.0 LMOD.3 COM0-COM3 SEG0-SEG31 P8.0-P8.7 LCD Mode Register Lmod LMOD.5 LMOD.4LMOD.3 LMOD.2 LMOD.1 LMOD.0 LCD Drive Voltage LCD Power Supply Static Mode BiasGND LCD Voltage Dividing Resistors Voltage Dividing Resistor Circuit Diagrams LCD Common Signal Waveform Static Common COM Signals LCD Common Signal Waveform at 1/2 Bias 1/2, 1/3 Duty LCD Common Signal Waveform at 1/3 Bias 1/3, 1/4 Duty Select/No-Select Signals for LCD Static Display Mode Segment SEG SignalsSEG Select No-select Select Non-select Select/No-Select Signals for LCD 1/2 Bias Display Mode 10. Select/No-select Bias Signals in 1/3 Bias Display Mode Select/No-Select Signals for LCD 1/3 Bias Display Mode COM0 SEG11 SEG12 VLC0 VSS +VLCD 0 Vlcd 11. LCD Signal Waveforms in Static Mode 12. LCD Connection Example in Static Mode COM0 COM1 SEG9 13. LCD Signal Waveforms at 1/2 Duty, 1/2 Bias 14. LCD Connection Example at 1/2 Duty, 1/2 Bias COM0 COM1 COM2 SEG12 15. LCD Signal Waveforms at 1/3 Duty, 1/2 Bias 16. LCD Connection Example at 1/3 Duty, 1/2 Bias 17. LCD Signal Waveforms at 1/3 Duty, 1/3 Bias 18. LCD Connection Example at 1/3 Duty, 1/3 Bias COM0 COM1 COM2 COM3 SEG13 19. LCD Signal Waveforms at 1/4 Duty, 1/3 Bias 20. LCD Connection Example at 1/4 Duty, 1/3 Bias 12-24 Serial I/O Operation Sequence Serial I/O Interface Serial I/O Interface Circuit Diagram SMOD.0 Serial I/O Mode Register SmodSMOD.1 SMOD.2 SIO Timing in Transmit/Receive Mode Serial I/O Timing Diagrams SBUF,EA EA,#0EEH SMOD,EA Serial I/O Buffer Register SbufBitr EMB EA,TDATA SBUF,EA EA,#4FH SMOD,EA Bits IES Ints Push SBUF,EA EA,#8FH SMOD,EAXCH EA,SBUF Bits SMOD.3 High Speed SIO Transmission SBUF,EA EA,#0FH SMOD,EA 13-8 Stop Mode Characteristics and Timing Waveforms Standard Electrical CharacteristicsElectrical Data Miscellaneous Timing Waveforms D.C. Electrical Characteristics Parameter Symbol Conditions Rating UnitsParameter Symbol Conditions Min Typ Max Units Absolute Maximum Ratings Output low Stop mode DD = 5 V ± 10% CPU = fx/4, Scmod = 0100B D.C. Electrical Characteristics Concluded Main System Clock Oscillator Characteristics Subsystem Clock Oscillator Characteristics Parameter Symbol Condition Min Typ Max UnitsInput/Output Capacitance Input Width A.C. Electrical Characteristics Released by Reset 17/fx Time Released by interrupt Parameter Symbol Conditions Min Typ Max Unit Timing Waveforms A.C. Timing Measurement Points Except for XIN and Xtin TCL0 Timing 10. Serial Data Transfer Timing Mechanical Data QFP-1420C Package Dimensions 15-2 16 KS57P2308/P2316 OTP KS57P2308/KS57P2316 Operating Mode Characteristics REGTest 16-4 16-5 KS57P2308/P2316 OTPKS57C2308/P2308/C2316/P2316 16-7 16-8 16-9 16-10 Timing Waveforms 16-12 16-13 11. Serial Data Transfer Timing 12. OTP Programming Algorithm KS57P2308/P2316 OTP KS57C2308/P2308/C2316/P2316 16-16 Sama Assembler ShineSASM57 HEX2ROM Smds Product Configuration SMDS2+ 17-2 TB572308A/16A Target Board SMDS2/SMDS2+ Xtal MDS XTI Idle LEDStop LED DIP Pin Connectors for TB572308A/16A KS57 Series Mask ROM Order Form Page Risk Order Information KS57 Series Request for Production AT Customer RiskCustomer Risk Order Agreement Order Quantity and Delivery SchedulePage Attachment Check one KS57C2308 Mask Option Selection FormProm Customer Checksum Company Name Signature EngineerPage KS57C2316 Mask Option Selection Form KS57 Series OTP Factory Writing Order Form 1/2 + What is the purpose of this order?Page Device Number KS57P2308 OTP Factory Writing Order Form 2/2+ Are you going to continue ordering this device? If so, how much will you be ordering? PCSPage KS57P2316 OTP Factory Writing Order Form 2/2