FT2232HL-REEL FTDI, FT2232HL-REEL Datasheet - Page 22

• Manufacturer Part Number: FT2232HL-REEL
• Description: USB Interface IC USB HS to Dual UART/ FIFO/SPI/JTAG/I2C
• Manufacturer: FTDI

Specifications of FT2232HL-REEL

• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.10
Clearance No.: FTDI#77
4.3.2 Dual Port RS422 Configuration
Figure 4.2 illustrates how the FT2232H can be configured as a dual RS422 interface.
Figure 4.2 Dual RS422 Configuration
In this case both channel A and channel B are configured as UART operating at TTL levels and a level
converter device (full duplex RS485 transceiver) is used to convert the TTL level signals from the
FT2232H to RS422 levels. The PWREN# signal is used to power down the level shifters such that they
operate in a low quiescent current when the USB interface is in suspend mode.
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