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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC24F04KA201 датащи(PDF) 26 Page - Microchip Technology |
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PIC24F04KA201 датащи(HTML) 26 Page - Microchip Technology |
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26 / 224 page  PIC24F04KA201 FAMILY DS39937B-page 24 Preliminary © 2009 Microchip Technology Inc. 3.3.2 DIVIDER The divide block supports 32-bit/16-bit and 16-bit/16-bit signed and unsigned integer divide operations with the following data sizes: 1. 32-bit signed/16-bit signed divide 2. 32-bit unsigned/16-bit unsigned divide 3. 16-bit signed/16-bit signed divide 4. 16-bit unsigned/16-bit unsigned divide The quotient for all divide instructions ends up in W0 and the remainder in W1. Sixteen-bit signed and unsigned DIV instructions can specify any W register for both the 16-bit divisor (Wn), and any W register (aligned) pair (W(m + 1):Wm) for the 32-bit dividend. The divide algorithm takes one cycle per bit of divisor, so both 32-bit/16-bit and 16-bit/16-bit instructions take the same number of cycles to execute. 3.3.3 MULTI-BIT SHIFT SUPPORT The PIC24F ALU supports both single bit and single-cycle, multi-bit arithmetic and logic shifts. Multi-bit shifts are implemented using a shifter block, capable of performing up to a 15-bit arithmetic right shift, or up to a 15-bit left shift, in a single cycle. All multi-bit shift instructions only support Register Direct Addressing for both the operand source and result destination. A full summary of instructions that use the shift operation is provided below in Table 3-2. TABLE 3-2: INSTRUCTIONS THAT USE THE SINGLE AND MULTI-BIT SHIFT OPERATION Instruction Description ASR Arithmetic shift right source register by one or more bits. SL Shift left source register by one or more bits. LSR Logical shift right source register by one or more bits. |
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