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S3C72G9 Datasheet(PDF) 4 Page - Samsung semiconductor |
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S3C72G9 Datasheet(HTML) 4 Page - Samsung semiconductor |
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4 / 96 page  FLEXIBLE BIT MANIPULATION In addition to normal bit manipulation instructions like set and clear, the SAM47 instruction set can also perform bit tests, bit transfers, and bit Boolean operations. Bits can also be addressed and manipulated by special bit addressing modes. Three types of bit addressing are supported: — mema.b — memb.@L — @H+DA.b The parameters of these bit addressing modes are described in more detail in Table 5-2. Table 5-2. Bit Addressing Modes and Parameters Addressing Mode Addressable Peripherals Address Range mema.b ERB, EMB, IS1, IS0, IEx, IRQx FB0H-FBFH Ports FF0H-FFFH memb.@L BSCx, Ports FC0H-FFFH @H+DA.b All bit-manipulatable peripheral hardware All bits of the memory bank specified by EMB and SMB that are bit-manipulatable , 0*% The following instructions have a skip function when an overflow or borrow occurs: XCHI INCS XCHD DECS LDI ADS LDD SBS If there is an overflow or borrow from the result of an increment or decrement, a skip signal is generated and a skip is executed. However, the carry flag value is unaffected. The instructions BTST, BTSF, and CPSE also generate a skip signal and execute a skip when they meet a skip condition, and the carry flag value is also unaffected. |
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