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PM0044 Datasheet(PDF) 155 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) 155 Page - STMicroelectronics

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PM0044
STM8 instruction set
Doc ID 13590 Rev 3
155/162
Syntax
TNZ dst
e.g. TNZ A
Operation
{N, Z} = Test(dst)
Description
The destination byte is tested and both N and Z flags of the Condition Code
(CC) register are updated accordingly. This instruction is compact, and
does not affect any register when used with RAM variables.
Instruction overview
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.
Detailed description
See also: TNZW, CP, BCP
TNZ
Test for Negative or Zero
TNZ
mnem
dst
Affected condition flags
VI1
H
I0
N
Z
C
TNZ
Reg
--
--
N
Z
-
TNZ
Mem
--
--
N
Z
-
dst
Asm
cy
lgth
Op-code(s)
ST7
ATNZ A
1
1
4D
✗
shortmem
TNZ $15
1
2
3D
XX
✗
longmem
TNZ $1505
1
4
72
5D
MS
LS
(X)
TNZ (X)
1
1
7D
✗
(shortoff,X)
TNZL ($15,X)
1
2
6D
XX
✗
(longoff,X)
TNZ ($1505,X)
1
4
72
4D
MS
LS
(Y)
TNZ (Y)
1
2
90
7D
✗
(shortoff,Y)
TNZ ($15,Y)
1
3
90
6D
XX
✗
(longoff,Y)
TNZ ($1505,Y)
1
4
90
4D
MS
LS
(shortoff,SP)
TNZ ($15,SP)
1
2
0D
XX
✗
[shortptr.w]
TNZ [$15]
4
3
92
3D
XX
✗
[longptr.w]
TNZ [$1505].w
4
4
72
3D
MS
LS
([shortptr.w],X)
TNZ ([$15],X)
4
3
92
6D
XX
✗
([longptr.w],X)
TNZ ([$1505.w],X)
4
4
72
6D
MS
LS
([shortptr.w],Y)
TNZ ([$15],Y)
4
3
91
6D
XX
✗



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