KS57C2308/P2308/C2316/P2316 SAM47 INSTRUCTION SET
5-29
BAND — Bit Logical And
BAND C,src.b
Operation: Operand Operation Summary Bytes Cycles
C,mema.b Logical-AND carry flag with memory bit 2 2
C,memb.@L 2 2
C,@H+DA.b 2 2
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 Binary Code Operation Notation
C,mema.b *11110101C ← C AND mema.b
C,memb.@L 11110101C ← C AND [memb.7–2 + L.3–2].
[L.1–0]
0 1 0 0 a5 a4 a3 a2
C,@H+DA.b 11110101C ← C AND [H + DA.3–0].b
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. 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 15 ;C ← "1"
BAND C,P1.0 ;If P1.0 = "1", C ← "1"
;If P1.0 = "0", C ← "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 L,#9H
BAND C,P1.@L ;P1.@L is specified as P2.1
;C AND P2.1