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S3C72G9 Datasheet(PDF) 42 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) 42 Page - Samsung semiconductor

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',#$%!-'. )'!
BTSTZ
dst.b
Operation:
Operand
Operation Summary
Bytes
Cycles
mema.b
Test specified bit; skip and clear if memory bit is set
2
2 + S
memb.@L
2
2 + S
@H+DA.b
2
2 + S
Description:
The specified bit within the destination operand is tested. If it is a "1", the instruction immediately
following the BTSTZ instruction is skipped; otherwise the instruction following the BTSTZ is
executed. The destination bit value is cleared.
Operand
Binary Code
Operation Notation
mema.b

1
1
1
1
1
1
0
1
Skip if mema.b = 1 and clear
memb.@L
1
1
1
1
1
1
0
1
Skip if [memb.7-2 + L.3-2].
[L.1-0] = 1 and clear
0
1
0
0
a5
a4
a3
a2
@H+DA.b
1
1
1
1
1
1
0
1
Skip if [H + DA.3-0].b =1 and clear
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. Port pin P0.0 is toggled by checking the P0.0 value (level):
BTSTZ
P0.0
; If P0.0 = "1", then P0.0
← "0" and skip
BITS
P0.0
; If P0.0 = "0", then P0.0
← "1"
JP
LABEL3
2. For toggling P2.2, P2.3, and P3.0-P3.3:
LD
L,#0AH
BP2
BTSTZ
P2.@L
; First, P2.@0AH = P2.2
; (111100B) + 10B.10B = 0F2H.2
BITS
P2.@L
INCS
L
JR
BP2


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