Samsung KS57C2308 Manual page 103

KS57C2308/P2308/C2316/P2316
BAND
— Bit Logical And
BAND C,src.b
Operation: Operand
C,mema.b
C,memb.@L
C,@H+DA.b
Description: The specified bit of the source is logically ANDed with the carry flag bit value. If the Boolean
value of the source bit is a logic zero, the carry flag is cleared to "0"; otherwise, the current carry
flag setting is left unaltered. The bit value of the source operand is not affected.
Operand
C,mema.b
C,memb.@L
C,@H+DA.b
*
mema.b
Examples: 1. The following instructions set the carry flag if P1.0 (port 1.0) is equal to "1" (and assuming the
carry flag is already set to "1"):
SMB
BAND C,P1.0
2. Assume the P1 address is FF1H and the value for register L is 9H (1001B). The address
(memb.7–2) is 111100B; (L.3–2) is 10B. The resulting address is 11110010B or FF2H,
specifying P2. The bit value for the BAND instruction, (L.1–0) is 01B which specifies bit 1.
Therefore, P1.@L = P2.1:
LD
BAND C,P1.@L
Operation Summary
Logical-AND carry flag with memory bit
Binary Code
1 1 1
*
1 1 1
0 1 0
1 1 1
0 0 b1 b0
Second Byte
1 0 b1 b0
1 1 b1 b0
15
L,#9H
1 0 1 0 1
1 0 1 0 1
0 a5 a4 a3 a2
1 0 1 0 1
a3 a2 a1 a0
a3 a2 a1 a0 FB0H–FBFH
a3 a2 a1 a0 FF0H–FFFH
; C "1"
; If P1.0 = "1", C
; If P1.0 = "0", C
; P1.@L is specified as P2.1
; C AND P2.1
SAM47 INSTRUCTION SET
Bytes
2
2
2
Operation Notation
C C AND mema.b
C C AND [memb.7–2 + L.3–2].
[L.1–0]
C C AND [H + DA.3–0].b
Bit Addresses
"1"
"0"
Cycles
2
2
2
5-29