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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD6654/PCB датащи(PDF) 71 Page - Analog Devices |
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AD6654/PCB датащи(HTML) 71 Page - Analog Devices |
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71 / 88 page  AD6654 Rev. 0 | Page 71 of 88 ACCESSING MULTIPLE AD6654 DEVICES If multiple AD6654 devices are on a single board, the microport pins for these devices can be shared. In this configuration, a single programming device (DSP, FPGA, or microcontroller) can program all AD6654 devices connected to it. Each AD6654 has four CHIPID pins that can be connected in 16 different ways. During a write/read access, the internal circuitry checks to see if the CHIPID bits in the chip I/O access control register (Address 0x02) are the same as the logic levels of the CHIPID pins (hardwired to the part). If the CHIPID bits and the CHIPID pins have the same value, then a write/read access is completed; otherwise, the access is ignored. To program multiple devices using the same microport control and data buses, the devices should have separate CHIPID pin configurations. A write/read access can be made only on the intended chip; all other chips would ignore the access. |
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