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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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FT2232C датащи(PDF) 39 Page - Future Technology Devices International Ltd. |
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FT2232C датащи(HTML) 39 Page - Future Technology Devices International Ltd. |
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39 / 51 page  DS2232C Version 1.4 © Future Technology Devices International Ltd. 2005 Page 39 of 54 FT2232C Dual USB UART / FIFO I.C. Enabling Synchronous Bit-Bang mode is enabled using Set Bit Bang Mode driver command. A hex value of 4 will enable it, and a hex value of 0 will reset the device. See application note AN2232C-02, “Bit Mode Functions for the FT2232C” for more details and examples. Figure 25 - Synchronous Bit Bang Mode Signal Timing Clk Time D7..0 t1 t2 t3 t4 t5 t6 WR# RD# Current Data New Data Time Description t1 Current pin state is read t2 RD# is set inactive t3 RD# is set active again, and any pins that are output will change to the new data. t4 Clock state for data setup t5 WR# goes active t6 WR# goes inactive The internal RD# and WR# strobes are brought out of the device to allow external logic to be clocked by accesses to the bit-bang IO bus. |
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