DS_FT312D Datasheet, PDF (14/25 Pages) List of Unclassifed Manufacturers – Future Technology Devices International Ltd.

DS_FT312D USB ANDROID HOST IC Datasheet
Version 1.0
Document No.: FT_000816 Clearance No.: FTDI# 331
8 Application Examples
The following sections illustrate possible applications of the FT312D.
8.1 USB to UARTConverter
5V
3V3
3V3
REGULATOR
5V Power to USB
1
2
3
4
5
SHIELD
Ferrite
Bead
27R
27R
47pF
47pF
100nF
GND
GND
3V3
100nF
+
4.7uF
VCC
VCCIO
RESET#
USBDM
USBDP
TXD
RXD
RTS#
CTS#
FT312D
TX_ACTIVE
UART_TXD
UART_RXD
UART_RTS#
UART_CTS#
UART_TX_ACTIVE
MCU/FPGA
AVCC
USB_ERROR
VREGOUT
LED
620R
3V3
100nF
GND
GND
Figure 8.1Application Example showing USB to UART Converter
The UART signals are at 3V3 level and may be used to drive directly into a FPGA or MCU with a 3V3
interface, or could be level shifted with an RS232, RS422 or RS485 transceiver. The TX_ACTIVE signal is
used mostly with RS485 transceivers to enable the Transmit line drivers.
The unused pins may be left unterminated.
Copyright © 2013 Future Technology Devices International Limited
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