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FT121Q-R 数据表(PDF) 33 Page - Future Technology Devices International Ltd. |
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FT121Q-R 数据表(HTML) 33 Page - Future Technology Devices International Ltd. |
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33 / 46 page  Copyright © 2014 Future Technology Devices International Limited 33 Document No.: FT_000648 FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC Datasheet Version 1.2 Clearance No.: FTDI# 312 7 Application Information Figure 7-1 shows a reference application circuit for a USB bus-powered application. Figure 7-1 shows a reference application circuit for a USB self-powered application. FT121 1 2 3 4 5 SHIELD Ferrite Bead VCC VOUT3V3 DM DP VCCIO VCC RESET_n 100nF 10nF 27R 27R MCU VCC3V3 VCC SUSPEND MOSI MISO SCLK SS_n INT_n VBUS_S MOSI MISO SCLK SS# GPIO 100nF VCC3V3 GPIO 10k 10k 47pF 100nF 4.7uF + VCC 47pF Figure 7-1 FT121 bus powered application FT121 1 2 3 4 5 SHIELD VCC VOUT3V3 DM DP VCCIO VCC RESET_n 100nF 27R 27R MCU VCC VCC SUSPEND MOSI MISO SCLK SS_n INT_n VBUS_S GPIO MOSI MISO SCLK SS# GPIO 100nF VCC3V3 470k 1M 47pF 47pF 10k 10k VCC3V3 1M 1M 100nF 4.7uF + VCC Figure 7-2 FT121 self powered application |
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