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PM0044 数据表(PDF) 117 Page - STMicroelectronics

部件名 PM0044
功能描述  STM8 CPU programming manual
PDF  162 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

PM0044 数据表(HTML) 117 Page - STMicroelectronics

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PM0044
STM8 instruction set
Doc ID 13590 Rev 3
117/162
Syntax
LDW dst,src
e.g. LDW X,#$1500
Operation
dst <= src
Description
Load the destination word (16-bit value) with the source word. The dst and
src can be a 16-bit register (X, Y or SP) or a memory/data 16-bit value.
Instruction overview
N
⇒
R15
Set if bit 7 of the result is set (negative value), cleared otherwise.
Z
⇒
R15.R14.R13.R12.R11.R10.R9.R8.R7.R6.R5.R4.R3.R2.R1.R0
Set if the result is zero (0x0000), cleared otherwise.
Detailed description
LDW
Load word
LDW
mnem
dst
src
Affected condition flags
VI1
H
I0
N
Z
C
LD
Reg
Mem
-
-
-
-
N
Z
-
LD
Mem
Reg
-
-
-
-
N
Z
-
LD
Reg
Reg
--
-----
LD
SP
Reg
--
-----
LD
Reg
SP
--
-----
dst
src
Asm
cy
lgth
Op-code(s)
ST7
X
#word
LDW X,#$55AA
2
3
AE
MS
LS
✗
X
shortmem
LDW X,$50
2
2
BE
XX
✗
X
longmem
LDW X,$5000
2
3
CE
MS
LS
✗
X
(X)
LDW X,(X)
2
1
FE
✗
X
(shortoff,X)
LDW X,($50,X)
2
2
EE
XX
✗
X
(longoff,X)
LDW X,($5000,X)
2
3
DE
MS
LS
✗
X
(shortoff,SP)
LDW X,($50,SP)
2
2
1E
XX
X
[shortptr.w]
LDW X,[$50.w]
5
3
92
CE
XX
✗
X
[longptr.w]
LDW X,[$5000.w]
5
4
72
CE
MS
LS
X
([shortptr.w],X) LDW X,([$50.w],X)
5
3
92
DE
XX
✗
X
([longptr.w],X)
LDW
X,([$5000.w],X)
54
72
DE
MS
LS
dst
src
Asm
cy
lgth
Op-code(s)
ST7
shortmem
X
LDW $50,X
2
2
BF
XX
✗
longmem
X
LDW $5000,X
2
3
CF
MS
LS
✗
(X)
Y
LDW (X),Y
2
1
FF
(shortoff,X)
Y
LDW ($50,X),Y
2
2
EF
XX
(longoff,X)
Y
LDW ($5000,X),Y
2
3
DF
MS
LS



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