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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9374LF датащи(PDF) 30 Page - STMicroelectronics |
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L9374LF датащи(HTML) 30 Page - STMicroelectronics |
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30 / 80 page  Circuit description L9374LF 30/80 DocID025414 Rev 1 Example Example for a 5 ms cycle time, 2.5 ms SYNC_VALUE-, STW of +1.75 ms/-1.25 ms: Cycle time: – For programming the cycle time the master has to write the RESET_VALUE (4 bit) via SPI. One bit has the resolution of 4/f_A = 1 ms. – RESET_VALUE: 5 ms / 1 ms = 5 0101(2) SYNC_VALUE: – For programming the sync-signal the master has to write the SYNC_VALUE (6 bit). The LSB has the resolution of 250 μs. – SYNC_VALUE: 2.5 ms / 250 μs = 10 00 1010(2) Sync tolerance window: – For programming the STW the master must write min and max values (2 x 5 bit): STW_V_MIN: 0.75 ms STW_V_MAX: 3.75 ms STW_V_MIN: 0.75 ms / 250 μs + 1 = 4 0 0100(2) STW_V_MAX: 3.75 ms / 250 μs + 1 = 16 1 0000(2) Figure 15. Normal mode SPI transfer means transfer of all send and receive registers (0 through 15). |
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