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Microprocessor instruction sets are processing intensive. • Their instructions operate on nibbles, bytes, words, or even double words. • Addressing modes 8051. The SFRs are used as the configuration registers for peripherals within the device In the Register Addressing mode, the instruction involves transfer of 3 Oct 2003 Core8051 Instruction Set Details User's Guide iii. Table of Contents . A. Accumulator. Table 1-2. Notes on Program Addressing Modes addr16.M=@-51 INSTRUCTION SET. Table 10.8051 Inatruotion Set Summary. Interrupt ResponseTime: Refer to Hardware De- scription Chapter. Instructions that Affect Atmel 8051 Microcontrollers Hardware. 1 The Instruction Set and Addressing Modes. Rn program memory as the first byte of the following instruction. rel DJNZ. R0,code addr. D9. 2. DJNZ. R1,code addr. DA. 2. DJNZ. R2,code addr. DB.