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8052 Instruction Set
E-11
8052 Instruction Set
INC Increment Reister
Syntax INC register
Instructions OpCode Bytes Cycles Flags
INC A 0x04 1 1 None
INC direct 0x05 2 1 None
INC @R0 0x06 1 1 None
INC @R1 0x07 1 1 None
INC R0 0x08 1 1 None
INC R1 0x09 1 1 None
INC R2 0x0A 1 1 None
INC R3 0x0B 1 1 None
INC R4 0x0C 1 1 None
INC R5 0x0D 1 1 None
INC R6 0x0E 1 1 None
INC R7 0x0F 1 1 None
INC DPTR 0xA3 1 2 None
INC increments the value of register by 1. If the initial value of register is 255
(0xFF
H
), incrementing the value causes it to reset to 0.
Note:
The carry flag is not set when the value rolls over from 255 to 0.
In the case of INC DPTR, the two-byte value of DPTR is incremented as an
unsigned integer. If the initial value of DPTR is 65 535 (0xFFFF
H
), increment-
ing the value causes it to reset to 0. Again, the carry flag is not set when the
value of DPTR rolls over from 65 535 to 0.
See also: ADD, ADDC, DEC