MCU instruction function

MCU instruction function list

1. Transmission Operation

Mnemonic code description MOV A,Rn E8~EF Register A MOV A,direct E5 direct byte to A MOV A,@Ri ER~E7 Indirect RAM to A MOV A,#data 74 data immediately sends data to A MOV Rn,A F8~FF A sends register MOV Rn,dircet A8~AF dircet Direct byte to register MOV Rn,#data 78~7F data immediately sends data to register MOV dircet,A F5 dircet A sends direct byte MOV dircet,Rn 88~8F dircet register sends direct byte MOV dircet1, dircet2 85 dircet1 dircet2 Direct byte to direct byte MOV dircet,@Ro 86~87 Indirect RAM sends direct bytes MOV dircet,#data 75 dircet data Immediate data to direct byte MOV @Ri,A F6~F7 A sends indirect RAM MOV @Ri,#data 76~77 data direct byte to indirect RAM MOV @Ri,#data 76~77 data immediately sends data to indirect RAM MOV DPTR,#data16 90 data 15~8 16-bit constant to data pointer data7~0 MOVC A,@A+DPTR 93 Program storage addressed by ((A)+(DPTR)) Device Byte Selection A MOVC A,@A+PC 83 Send the program memory byte addressed by ((A)+(PC)) to A MOVX A,@Ri E2~E3 Send external data (8-bit address) to A MOVX A,@DPTR E0 Send external data (16-bit address) to A MOVX @Ri,A F2~F3 A sends external data (8-bit address) MOVX @DPTR,A F0 A sends external data (16-bit address) PUSH dircet C0 dircet Direct byte is pushed into the stack, SP increases by 1 POP dircet D0 dircet Direct byte popped from stack, SP reduced by 1 XCH A,Rn C8~CF Exchange A and register XCH A,dircet C5 dircet Exchange A and direct bytes XCH A,@Ri C6~C7 Exchange A and indirect RAM XCH A,@Ri D6~D7 Exchange the low bits of A and indirect RAM SWAP A C4

2. Arithmetic Operations

(The two nibbles of A are swapped) ADD A,Rn 28~2F register added to A ADD A,dircet 25 dircet Direct byte added to A ADD A,@Ri 26~27 Indirect RAM added to A ADD A,#data 24data Add the immediate value to A ADD A,Rn 38~3F register and carry bit added to A ADD A,dircet 35dircet Add direct byte and carry bit to A ADD A,@Ri 36~37 Indirect byte and carry bit added to A ADD A,data 34 data Add the immediate value and carry bit to A ADD A,Rn 98~9F A minus register and carry bit ADD A,dircet 95 dircet A minus the direct byte and carry bit ADD A,@Ri 36~37 Indirect RAM and carry bit added to A ADD A,data 34 data Add the immediate value and carry bit to A SUBB A,Rn 98~9F A minus register and carry bit SUBB A,dircet 95 Dircet A minus the direct byte and carry bit SUBB A,@Ri 96~97 A minus indirect RAM and carry bit SUBB A,#data 94 Subtract the immediate value and carry bit from data A INC A 04 A plus 1 INC Rn 08~0F Register plus 1 INC dircet 05 dircet Direct byte plus 1 INC @Ri 06~07 Indirect RAM plus 1 DEC A 14 A minus 1 DEC Rn 18~1F Register decrement 1 DEC dircet 15 dircet direct byte minus 1 DEC @Ri 16~17 Indirect RAM minus 1 INC DPTR A3 Data pointer plus 1 MUL AB A4 multiply A by B DIV AB 84 A divided by B DA A D4 A decimal addition adjustment

3. Logical Operations

ANL A,Rn 58~5F register "AND" to A ANL A,dircet 55 dircet Direct byte AND to A ANL A,@Ri 56~57 Indirect RAm “AND” to A ANL A,#data 54 data immediate value “AND” to A ANL dircet A 52 dircet A ANDed to direct byte ANL dircet,#data 53 dircet data AND immediate data to direct byte ORL A,Rn 48~4F register "OR" to A ORL A,dircet 45 dircet Direct byte "OR" to A ORL A,@Ri 46~47 Indirect RAM “OR” to A ORL A,#data 44 data immediate value "OR" to A ORL dircet,A 42 dircet A "OR" to direct byte ORL dircet,#data 43 dircet data Or immediate data to direct byte XRL A,Rn 68~6F register "XOR" to A XRL A,dircet 65 dircet Direct byte "XOR" to A XRL A,@Ri 66~67 Indirect RAM "XOR" to A XRL A,#data 64 data immediate value "XOR" to A XRL dircet A 62 dircet A "XOR" to direct byte XRL dircet,#data 63 dircet data XOR immediate data to direct byte CLR A E4 Clear CPL A F4 A invert RL A 23 A Left ring shift RLC A 33 A Shift left by carrying RR A 03 A right ring shift RRC A 13 A Shift right by carry

4. Control Program Transfer

ACALL addr 11 *1 addr(a7~a0) absolute subroutine call LCALL addr 16 12 addr(15~8) long subroutine call addr(7~0) RET 22 Subroutine call return RETI addr 11 32 Interrupt call return AJMP addr 11 △1 addr (a7~a6) absolute jump LJMP addr 16 02addr(15~8) long transfer addr(7~0) SJMP rel 80 rel short jump, relative jump JMP @A+DPTR 73 Indirect transfer relative to DPTR JZ rel 60 rel A is zero transfer JNZ rel 70 rel A is zero transfer CJNE A,dircet,rel B5 dircet rel Direct byte comparison with A, jump if not equal CJNE A,#data,rel B4 data rel Compare the immediate value with A, if not equal, jump CJNE A,Rn,#data,rel B8~BF data rel Compare the immediate value with the register, if they are not equal, jump CJNE @Ri,#data,rel B6~B7 data rel Compare immediate data with indirect RAM, jump if not equal DJNZ Rn,rel D8~DF rel Register decrement 1, transfer if not zero DJNZ dircet,rel B5 dircet rel Direct byte minus 1, jump if not zero NOP 00 No operation *=a10a9a8l △=a10a9a80

5. Boolean variable operations

CLR C C3 Clear Carry CLR bit C2 Clear direct bit SETB C D3 Set Carry SETB bit D2 Set direct bit CPL C B3 Carry negation CPL bit B2 Direct bit inversion ANL C, bit 82 dit Direct number “and” to carry ANL C,/bit B0 Direct bit inverse “AND” to carry ORL C,bit 72 bit Direct bit “OR” to carry ORL C,/bit A0 bit Direct bit negative “OR” to carry MOV C,bit A2 bit Directly transfer the carry MOV bit,C 92 bit Carry to direct bit JC rel 40 rel Jump if the carry bit is 1 JNC rel 50 rel Jump if the carry bit is 0 JB bit,rel 20 bit rel Direct bit is 1 relative transfer JNB bit,rel 30 bit rel Direct bit is 0 relative transfer JBC bit,rel 10 bit rel Directly transfer relative bit to 1, then clear the bit