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S3C72G9 Datasheet(PDF) 32 Page - Samsung semiconductor

Part # S3C72G9
Description  SAM47 INSTRUCTION SET
Download  96 Pages
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Manufacturer  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

S3C72G9 Datasheet(HTML) 32 Page - Samsung semiconductor

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','
BITR
dst.b
Operation:
Operand
Operation Summary
Bytes
Cycles
DA.b
Clear specified memory bit to logic zero
2
2
mema.b
2
2
memb.@L
2
2
@H+DA.b
2
2
Description:
A BITR instruction clears to logic zero (resets) the specified bit within the destination operand. No
other bits in the destination are affected.
Operand
Binary Code
Operation Notation
DA.b
1
1
b1
b0
0
0
0
0
DA.b
← 0
a7
a6
a5
a4
a3
a2
a1
a0
mema.b

1
1
1
1
1
1
1
0
mema.b
← 0
memb.@L
1
1
1
1
1
1
1
0
[memb.7-2 + L3-2].[L.1-0]
← 0
0
1
0
0
a5
a4
a3
a2
@H+DA.b
1
1
1
1
1
1
1
0
[H + DA.3-0].b
← 0
0
0
b1
b0
a3
a2
a1
a0
Second Byte
Bit Addresses
 mema.b
1
0
b1
b0
a3
a2
a1
a0 FB0H-FBFH
1
1
b1
b0
a3
a2
a1
a0 FF0H-FFFH
Examples:
1. If the Bit location 30H.2 in the RAM has a current value of "1". The following instruction
clears the third bit of location 30H to "0":
BITR
30H.2
; 30H.2
← "0"
2. You can use BITR in the same way to manipulate a port address bit:
BITR
P0.0
; P0.0
← "0"


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