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S3C72G9 Datasheet(PDF) 34 Page - Samsung semiconductor |
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S3C72G9 Datasheet(HTML) 34 Page - Samsung semiconductor |
34 / 96 page ![]() ' BITS dst.b Operation: Operand Operation Summary Bytes Cycles DA.b Set specified memory bit 2 2 mema.b 2 2 memb.@L 2 2 @H+DA.b 2 2 Description: This instruction sets the specified bit within the destination without affecting any other bits in the destination. BITS can manipulate any bit that is addressable using direct or indirect addressing modes. Operand Binary Code Operation Notation DA.b 1 1 b1 b0 0 0 0 1 DA.b ← 1 a7 a6 a5 a4 a3 a2 a1 a0 mema.b 1 1 1 1 1 1 1 1 mema.b ← 1 memb.@L 1 1 1 1 1 1 1 1 [memb.7-2 + L.3-2].b [L.1-0] ← 1 0 1 0 0 a5 a4 a3 a2 @H+DA.b 1 1 1 1 1 1 1 1 [H + DA.3-0].b ← 1 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 "0", the following instruction sets the second bit of location 30H to "1". BITS 30H.2 ; 30H.2 ← "1" 2. You can use BITS in the same way to manipulate a port address bit: BITS P0.0 ; P0.0 ← "1" |
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