CD00001237 Datasheet, PDF (59/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter

ST6215C ST6225C
INSTRUCTION SET (Cont’d)
Arithmetic and Logic. These instructions are
used to perform arithmetic calculations and logic
operations. In AND, ADD, CP, SUB instructions
one operand is always the accumulator while, de-
pending on the addressing mode, the other can be
either a data space memory location or an imme-
diate value. In CLR, DEC, INC instructions the op-
erand can be any of the 256 data space address-
es. In COM, RLC, SLA the operand is always the
accumulator.
Table 17. Arithmetic & Logic Instructions
Instruction
Addressing Mode
ADD A, (X)
Indirect
ADD A, (Y)
Indirect
ADD A, rr
Direct
ADDI A, #N
Immediate
AND A, (X)
Indirect
AND A, (Y)
Indirect
AND A, rr
Direct
ANDI A, #N
Immediate
CLR A
Short Direct
CLR r
Direct
COM A
Inherent
CP A, (X)
Indirect
CP A, (Y)
Indirect
CP A, rr
Direct
CPI A, #N
Immediate
DEC X
Short Direct
DEC Y
Short Direct
DEC V
Short Direct
DEC W
Short Direct
DEC A
Direct
DEC rr
Direct
DEC (X)
Indirect
DEC (Y)
Indirect
INC X
Short Direct
INC Y
Short Direct
INC V
Short Direct
INC W
Short Direct
INC A
Direct
INC rr
Direct
INC (X)
Indirect
INC (Y)
Indirect
RLC A
Inherent
SLA A
Inherent
SUB A, (X)
Indirect
SUB A, (Y)
Indirect
SUB A, rr
Direct
SUBI A, #N
Immediate
Notes:
X,Y Index Registers
V, W Short Direct Registers
Δ Affected
Bytes
1
1
2
2
1
1
2
2
2
3
1
1
1
2
2
1
1
1
1
2
2
1
1
1
1
1
1
2
2
1
1
1
2
1
1
2
2
Cycles
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Flags
Z
C
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
*
*
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
*
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
Δ
# Immediate data (stored in ROM memory)
* Not Affected
rr Data space register
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