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FT121 Datasheet(PDF) 22 Page - Future Technology Devices International Ltd. |
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FT121 Datasheet(HTML) 22 Page - Future Technology Devices International Ltd. |
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22 / 46 page  Copyright © 2014 Future Technology Devices International Limited 22 Document No.: FT_000648 FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC Datasheet Version 1.2 Clearance No.: FTDI# 312 Command Name Target Code (hex) Data phase Read Vendor ID Device EBh Read 2 bytes Read Product ID Device EAh Read 2 bytes Read FTDI ID Device EDh Read 1 byte Table 6.2 enhanced command set 6.2 Initialization Commands 6.2.1 Set Address Enable Command : D0h Data : Write 1 byte Bit Symbol Reset Description 6-0 Address 0b’0000000 USB assigned device address. A bus reset will reset all address bits to 0. 7 Enable 0 Function enable. A bus reset will automatically enable the function at default address 0. Table 6.3 Address Enable Register 6.2.2 Set Endpoint Enable Command : D8h Data : Write 1 byte Bit Symbol Reset Description 0 EP_Enable 0 Enable all endpoints (Note EP0 is always enabled regardless the setting of EP_Enable bit). Endpoints can only be enabled when the function is enabled. 7-1 Reserved 0b’0000000 Reserved, write to 0 Table 6.4 Endpoint Enable Register 6.2.3 Set Mode Command : F3h Data : Write 2 bytes Bit Symbol Reset Description 1-0 Reserved 0b’00 Reserved, write to 0 |
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