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HCS12 датащи(PDF) 300 Page - Freescale Semiconductor, Inc

номер детали HCS12
подробное описание детали  HCS12 Microcontrollers
PDF  452 Pages
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производитель  FREESCALE [Freescale Semiconductor, Inc]
домашняя страница  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

HCS12 датащи(HTML) 300 Page - Freescale Semiconductor, Inc

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Instruction Glossary
S12CPUV2 Reference Manual, Rev. 4.0
300
Freescale Semiconductor
Operation:
(A) – $00
Description:
Subtracts $00 from the content of accumulator A and sets the condition
codes accordingly.
The subtraction is accomplished internally without modifying A.
The TSTA instruction provides limited information when testing unsigned
values. Since no unsigned value is less than zero, BLO and BLS have no
utility following TSTA. While BHI can be used after TST, it performs the
same function as BNE, which is preferred. After testing signed values, all
signed branches are available.
TSTA
Test A
TSTA
CCR Details:
S
X
HIN
Z
V
C
––––
∆∆
00
N: Set if MSB of result is set; cleared otherwise
Z: Set if result is $00; cleared otherwise
V: 0; cleared
C: 0; cleared
Source Form
Address
Mode
Object Code
Access Detail
HCS12
M68HC12
TSTA
INH
97
O
O



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