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STC89LE53RC Datenblatt(PDF) 48 Page - STCmicro Technology Co,.Ltd

Teilenummer STC89LE53RC
Bauteilbeschribung  Enhanced 80C51 Central Processing Unit ,6T or 12T per machine cycle
PDF  165 Pages
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Hersteller  STC [STCmicro Technology Co,.Ltd]
Direct Link  http://www.stcmicro.com/
Logo STC - STCmicro Technology Co,.Ltd

STC89LE53RC Datenblatt(HTML) 48 Page - STCmicro Technology Co,.Ltd

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CLR A
Function:
Clear Accumulator
Description:
The Aecunmlator is cleared (all bits set on zero). No flags are affected.
Example:
The Accumulator contains 5CH (01011100B). The instruction,
CLR A
will leave the Accumulator set to 00H (00000000B).
Bytes:
1
Cycles:
1
Encoding:
1 1 1 0
0 1 0 0
Operation:
CLR
(A)← 0
← 00
CLR bit
Function:
Clear bit
Description:
The indicated bit is cleared (reset to zero). No other flags are affected. CLR can operate on
the carry flag or any directly addressable bit.
Example:
Port 1 has previously been written with 5DH (01011101B). The instruction,
CLR
P1.2
will leave the port set to 59H (01011001B).
CLR C
Bytes:
1
Cycles:
1
Encoding:
1 1 0 0
0 0 1 1
Operation:
CLR
(C) ← 0
← 00
CLR bit
Bytes:
2
Cycles:
1
Encoding:
1 1 0 0
0 0 1 0
bit address
Operation:
CLR
(bit) ← 0
← 00
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