ft232hq Future Technology Devices International Ltd., ft232hq Datasheet - Page 58

• Manufacturer Part Number: ft232hq
• Description: Ft232h Single Channel Hi- Speed Usb To Multipurpose Uart/fifo Ic
• Manufacturer: Future Technology Devices International Ltd.

Document No.: FT_000288
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 1.0
Clearance No.: FTDI #199
7
EEPROM Configuration
7.1 EEPROM Interface
The FT232H uses configuration data from an external EEPROM. The EEPROM must be 16 bits wide
(93LC56B) and capable or working at a VCC supply of +2.97 to +3.63 volts. Adding an external
(93LC56B) EEPROM allows the chip to be configured as a serial UART (RS232 mode), parallel FIFO (245)
mode, FT1248, fast serial (opto isolation) or CPU-Style FIFO.
Figure 7.1 EEPROM Interface
The external EEPROM can also be used to customise the USB VID, PID, Serial Number, Product
Description Strings and Power Descriptor value of the FT232H for OEM applications. Other parameters
controlled by the EEPROM include Remote Wake Up, Soft Pull Down on Power-Off and I/O pin drive
strength.
If the FT232H is used without an external EEPROM the chip defaults to a USB to asynchronous serial
UART (RS232 mode) port device. If no EEPROM is connected (or the EEPROM is blank), the FT232H uses
its built-in default VID (0403), PID (6014) Product Description and Power Descriptor Value. In this case,
the device will not have a serial number as part of the USB descriptor.
Copyright © 2011 Future Technology Devices International Limited
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