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PM0044 Datasheet(PDF) 151 Page - STMicroelectronics

No. de pieza PM0044
Descripción Electrónicos  STM8 CPU programming manual
PDF  162 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0044 Datasheet(HTML) 151 Page - STMicroelectronics

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PM0044
STM8 instruction set
Doc ID 13590 Rev 3
151/162
Syntax
SUB A,src
e.g. SUB A,#%11001010
Operation
A <= A- src
Description
The source byte is subtracted from the contents of the accumulator/SP and
the result is stored in the accumulator/SP. The source is a memory or data
byte.
Instruction overview
V
⇒
(A7.M7 + A7.R7 + A7.M7.R7)
⊕ (A6.M6 + A6.R6 + A6.M6.R6)
Set if the signed operation generates an overflow, cleared otherwise.
N
⇒
R7
Set if bit 7 of the result is set (negative value), cleared otherwise.
Z
⇒
R7.R6.R5.R4.R3.R2.R1.R0
Set if the result is zero (0x00), cleared otherwise.
C
⇒
A7.M7 + A7.R7 + A7.M7.R7
Set if a borrow request occurred from bit 7, cleared otherwise.
Detailed description
See also: SUBW, ADD, ADC, SBC, MUL
SUB
Subtraction
SUB
mnem
dst
src
Affected condition flags
VI1
H
I0
N
Z
C
SUB
A
Mem
V
---
N
Z
C
SUB
SP
Imm
-
---
--
-
dst
src
Asm
cy
lgth
Op-code(s)
ST7
A
#byte
SUB A,#$55
1
2
A0
XX
✗
A
shortmem
SUB A,$10
1
2
B0
XX
✗
A
longmem
SUB A,$1000
1
3
C0
MS
LS
✗
A
(X)
SUB A,(X)
1
1
F0
✗
A
(shortoff,X)
SUB A,($10,X)
1
2
E0
XX
✗
A
(longoff,X)
SUB A,($1000,X)
1
3
D0
MS
LS
✗
A
(Y)
SUB A,(Y)
1
2
90
F0
✗
A
(shortoff,Y)
SUB A,($10,Y)
1
3
90
E0
XX
✗
A
(longoff,Y)
SUB A,($1000,Y)
1
4
90
D0
MS
LS
✗
A
(shortoff,SP)
SUB A,($10,SP)
1
2
10
XX
A
[shortptr.w]
SUB A,[$10.w]
4
3
92
C0
XX
✗
A
[longptr.w]
SUB A,[$1000.w]
4
4
72
C0
MS
LS
A
([shortptr.w],X)
SUB A,([$10.w],X)
4
3
92
D0
XX
✗
A
([longptr.w],X)
SUB
A,([$1000.w],X)
44
72
D0
MS
LS
A
([shortptr.w],Y)
SUB A,([$10.w],Y)
4
3
91
D0
XX
✗
SP
#byte
SUB SP,#$9
1
2
52
XX



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