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FT121T-U Datasheet(PDF) 7 Page - Future Technology Devices International Ltd. |
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FT121T-U Datasheet(HTML) 7 Page - Future Technology Devices International Ltd. |
7 / 46 page Copyright © 2014 Future Technology Devices International Limited 7 Document No.: FT_000648 FT121 ENHANCED USB DEVICE CONTROLLER WITH SPI SLAVE IC Datasheet Version 1.2 Clearance No.: FTDI# 312 3.3 Pin Description PIN No. (TSSOP- 16) PIN No. (QFN- 16) PIN NAME TYPE DESCRIPTION 1 15 BCD_n OD USB Charger detector output 2 16 SCLK I SPI clock input 3 1 SS_n I SPI slave select input 4 2 GND P Ground 5 3 VCCIO P IO Supply Voltage; 1.8V, 2.5V or 3.3V 6 4 SUSPEND I,OD Device suspend (output) and wakeup (input) 7 5 INT_n OD Interrupt (Active Low) 8 6 MISO O 4-wire mode: SPI slave output 3-wire mode: no function. Leave it un-connected 9 7 MOSI I/IO 4-wire mode: SPI salve input 3-wire mode: SPI data input/output 10 8 VBUS_S I Vbus sensing input 11 9 RESET_n I Asynchronous reset (Active Low) 12 10 VOUT3V3 P 3.3V regulator output for 5V operation; To operate the IC at 3.3 V, supply 3.3 V to both the VCC and VOUT3V3 pins 13 11 VCC P Power supply (3.3V or 5V) 14 12 GND P Ground 15 13 DM AIO USB data signal minus 16 14 DP AIO USB data signal plus 17 GND P Ground Center bottom pad – may be left unconnected 18 VCCIO P IO Supply Voltage; 1.8V, 2.5V or 3.3V Center bottom pad – may be left unconnected 19 VOUT3V3 P 3.3V regulator output for 5V operation; To operate the IC at 3.3 V, supply 3.3 V to both the VCC and VOUT3V3 pins Center bottom pad – may be left unconnected 20 VCC P Power supply (3.3V or 5V) Center bottom pad – may be left unconnected Table 3.1 FT121 Pin Description |
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