May 2024
Intermediate to advanced
534 pages
17h 58m
English
book
8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
by Subrata Ghoshal
Content preview from 8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
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4.2 | ADDRESSING MODES
Figure 4.1 Execution of instruction MOV A, #data (immediate addressing mode)
Instruction: MOV A, #5AH
Bytes: 2
Cycles: 1
CY
PSW
0202
0203 31
30
2F
0C
0B
0A
09
08
07
06
05
04
03
02
01
00
0201
0200
01FF
01FE 5A
5AReg. A
Reg. B F0H
E0H
7401FD
01FC
01FB
01FA
01F9
01F8
01F7
01F6
01F5
D0H
AC F0 RS1
0
RS0
0
OV - P
Flags Affected: none
Opcode: 74H
Reg.
Bank
#0
Ban
k
#0
Data MemoryProgram Memory
SP 07H 81H
DPH
DPTR
01FFPC
= PC+2
DPL
In general, addressing modes are designated as per the method of targeting the source
data. Rarely it is used for destination-data targeting purpose.
4.2.1 | Immediate Addressing Mode
Fig. 4.1 explains the details of execution of an immediate addressing ...
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