Samsung KS57C2308 Manual

Contents

KS57C2308/P2308/C2316/P2316 SAM47 INSTRUCTION SET5-31BITR — Bit ResetBITR dst.bOperation: Operand Operation Summary Bytes CyclesDA.b Clear specified memory bit to logic zero 2 2mema.b 2 2memb.@L 2 2@H+DA.b 2 2Description: A BITR instruction clears to logic zero (resets) the specified bit within the destination operand. Noother bits in the destination are affected.Operand Binary Code Operation NotationDA.b 1 1 b1 b0 0 0 0 0 DA.b ← 0a7 a6 a5 a4 a3 a2 a1 a0mema.b * 1 1 1 1 1 1 1 0 mema.b ← 0memb.@L 1 1 1 1 1 1 1 0 [memb.7–2 + L3–2].[L.1–0] ← 00 1 0 0 a5 a4 a3 a2@H+DA.b 1 1 1 1 1 1 1 0 [H + DA.3–0].b ← 00 0 b1 b0 a3 a2 a1 a0Second Byte Bit Addresses* mema.b 1 0 b1 b0 a3 a2 a1 a0 FB0H–FBFH1 1 b1 b0 a3 a2 a1 a0 FF1H–FF9HExamples: 1. If the bit location 30H.2 in the RAM has a current value of “1”. The following instructionclears 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 P2.0 ; P2.0 ← "0"