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Document Reference No.: FT_000188
TTL TO USB SERIAL CONVERTER GENERIC CABLES Datasheet
Version 1.1
Clearance No.: FTDI# 129
Appendix A - Cable EEPROM Configuration
Each TTL-232RG cable is controlled by the FTDI FT232R IC. This FT232R device contains an EEPROM
which contains the USB configuration descriptors for that device. When the cable is plugged into a PC or a
USB reset is performed, the PC will read these descriptors. The default values stored into the internal
EEPROM are defined in the following table
Parameter
USB Vendor ID (VID)
USB Product UD (PID)
Serial Number Enabled?
Serial Number
Pull down I/O Pins in USB
Suspend
Manufacturer Name
Product Description
Max Bus Power Current
Power Source
Device Type
USB Version
Remote Wake Up
High Current I/Os
Load VCP Driver
Invert TXD
Invert RXD
Invert RTS#
Invert CTS#
Value
0403h
6001h
Yes
See Note
Disabled
FTDI
See note
90mA
Bus Powered
FT232R
0200
Disabled
Enabled
Enabled
Disabled
Disabled
Disabled
Disabled
Notes
FTDI default VID (hex)
FTDI default PID (hex)
A unique serial number is generated and programmed into
the EEPROM during device final test.
Enabling this option will make the device pull down on the
UART interface lines when the power is shut off (PWREN#
is high).
Product description depends on the cable. The following
lists a few of the Product description for each different
cable.
TTL-232RG-VSW3V3
TTL-232RG-VREG3V3
TTL-232RG-VREG1V8
TTL-232RG-VREGxVx
TTL-232RG-VIP
Returns USB 2.0 device description to the host.
Note: The device is a USB 2.0 Full Speed device (12Mb/s).
500uA suspend limit when in this state
Enables the high drive level on the UART and CBUS I/O
pins.
Makes the device load the VCP driver interface for the
device.
Signal on this pin becomes TXD# if enable.
Signal on this pin becomes RXD# if enable.
Signal on this pin becomes RTS if enable.
Signal on this pin becomes CTS if enable.
Default Internal EEPROM Configuration
Copyright ? 2009-10 Future Technology Devices International Limited
13
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TTL-234X-3V3 功能描述:CABLE USB TO UART 3.3V .1" CONN 制造商:ftdi, future technology devices international ltd 系列:* 零件状态:在售 标准包装:1
TTL-234X-3V3-2MM 功能描述:CABLE USB TO UART 3.3V 2MM CONN 制造商:ftdi, future technology devices international ltd 系列:* 零件状态:在售 标准包装:1
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