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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9548/PCBZ датащи(PDF) 53 Page - Analog Devices |
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AD9548/PCBZ датащи(HTML) 53 Page - Analog Devices |
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53 / 112 page  AD9548 Rev. 0 | Page 53 of 112 address generator decrements for each data byte of the multi- byte transfer cycle. When Register 0000, Bit 6 = 1 (LSB first), the instruction and data bytes must be written from LSB to MSB. Multibyte data transfers in LSB-first format start with an instruction byte that includes the register address of the least significant payload byte followed by multiple data bytes. The serial control port internal byte address generator increments for each byte of the multibyte transfer cycle. For multibyte MSB-first (default) I/O operations, the serial control port register address decrements from the specified starting address toward Address 0000. For multibyte LSB-first I/O operations, the serial control port register address increments from the starting address toward Address 1FFF. Unused addresses are not skipped during multibyte I/O operations; therefore, the user should write the default value to a reserved register and 0s to unmapped registers. Note that it is more efficient to issue a new write command than to write the default value to more than two consecutive reserved (or unmapped) registers. Table 30. Streaming Mode (No Addresses Are Skipped) Write Mode Address Direction Stop Sequence LSB First Increment 0x0000 ... 0x1FFF MSB First Decrement 0x1FFF ... 0x0000 Table 31. Serial Control Port, 16-Bit Instruction Word, MSB First MSB LSB I15 I14 I13 I12 I11 I10 I9 I8 I7 I6 I5 I4 I3 I2 I1 I0 R/W W1 W0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 CS SCLK DON'T CARE SDIO A12 W0 W1 R/W A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 DON'T CARE DON'T CARE DON'T CARE 16-BIT INSTRUCTION HEADER REGISTER (N) DATA REGISTER (N – 1) DATA Figure 53. Serial Control Port Write—MSB First, 16-Bit Instruction, Two Bytes of Data CS SCLK SDIO SDO REGISTER (N) DATA 16-BIT INSTRUCTION HEADER REGISTER (N – 1) DATA REGISTER (N – 2) DATA REGISTER (N – 3) DATA A12 W0 W1 R/W A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 DON'T CARE DON'T CARE DON'T CARE DON'T CARE D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 Figure 54. Serial Control Port Read—MSB First, 16-Bit Instruction, Four Bytes of Data tS DON'T CARE DON'T CARE W1 W0 A12 A11 A10 A9A8A7A6A5 D4 D3D2D1D0 DON'T CARE DON'T CARE R/W tDS tDH tHI tLO tCLK tC CS SCLK SDIO Figure 55. Serial Control Port Write—MSB First, 16-Bit Instruction, Timing Measurements |
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