FIFO I.C. FT2232L Datasheet

FT2232L I.C. Datasheet pdf. Equivalent

Part FT2232L
Description Dual USB UART / FIFO I.C
Feature FT2232L Dual USB UART / FIFO I.C. 1.0 The FT2232L is the lead free version of FTDI’s 3rd generatio.
Manufacture FTDI
Download FT2232L Datasheet

1.0 Introduction
The FT2232L is the lead free version of FTDI’s 3rd generation USB UART / FIFO I.C. family. This device features two
Multi-Purpose UART / FIFO controllers which can be configured individually in several different modes. As well as a
UART interface, FIFO interface and Bit-Bang IO modes of the 2nd generation FT232BM and FT245BM devices, the
FT2232L offers a variety of additional new modes of operation, including a Multi-Protocol Synchronous Serial Engine
interface which is designed specifically for synchronous serial protocols such as JTAG and SPI bus.
1.1 Features Summary
Reset input and Reset Output pins
Single Chip USB Dual Channel Serial / Parallel 5V and 3.3V logic IO Interfacing with independent
Ports with a variety of configurations
level conversion on each channel
Entire USB protocol handled on the USB- Integrated 3.3V LDO Regulator for USB IO
specific firmware programming required
Integrated 6MHz – 48Mhz clock multiplier PLL
FT232BM-style UART interface option with full
USB Bulk or Isochronous data transfer modes
Handshaking & Modem interface signals
4.35V to 5.25V single supply operating voltage
UART Interface supports 7 / 8 bit data, 1 / 2 stop
bits, and Odd / Even / Mark / Space / No Parity
UHCI / OHCI / EHCI host controller compatible
Transfer Data Rate 300 to 1 Mega Baud (RS232) USB 2.0 Full Speed (12 Mbits / Second)
Transfer Data Rate 300 to 3 Mega Baud (TTL and
RS422 / RS485)
Compact 48-LD Lead Free LQFP package
Auto Transmit Enable control for RS485 serial
applications using TXDEN pin
Windows 98 / 98 SE / 2000 / ME / XP
FT245BM-style FIFO interface option with bi-
Linux 2.40 and greater
directional data bus and simple 4 wire handshake Windows CE
MAC OS-8 and OS-9**
Transfer Data Rate up to 1 MegaByte / Second
Enhanced Bit-Bang Mode interface option
D2XX (USB Direct Drivers + DLL S/W Interface)
New Synchronous Bit-Bang Mode interface option Windows 98 / 98 SE / 2000 / ME / XP
New Multi-Protocol Synchronous Serial Engine
Linux 2.4 and Greater
(MPSSE) interface option
New MCU Host Bus Emulation Mode option
New Fast Opto-Isolated Serial Interface Mode
USB Dual Port RS232 Converters
USB Dual Port RS422 / RS485 Converters
Upgrading Legacy Peripheral Designs to USB
Interface mode and USB Description strings
USB Instrumentation
configurable in external EEPROM
USB JTAG Programming
EEPROM Configurable on board via USB
USB to SPI Bus Interfaces
Support for USB Suspend and Resume conditions USB Industrial Control
via PWREN#, and SI / WU pins
Field Upgradable USB Products
Support for bus powered, self powered, and high- Galvanically Isolated Products with USB Interface
power bus powered USB configurations
Integrated Power-On-Reset circuit, with optional
[ ** = In planning or under development ]
DS2232L Version 1.4
© Future Technology Devices International Ltd. 2005 Page 1 of 54

1.2 General Description
The FT2232L is a USB interface which incorporates the functionallity of two of FTDI’s second generation BM chips
into a single device. A single downstream USB port is converted to two IO channels which can each be individually
configured as a FT232BM-style UART interface, or a FT245BM-style FIFO interface, without the need to add a
USB hub. There are also several new special modes which are either enabled in the external EEPROM, or by using
driver commands. These include Synchronous Bit-Bang Mode, a CPU-Style FIFO Interface Mode, a Multi-Protocol
Synchronous Serial Engine Interface Mode, MCU Host Bus Emulation Mode, and Fast Opto-Isolated Serial Interface
Mode. In addition a new high drive level option means that the device UART / FIFO IO pins will drive out at around
three times the normal power level, meaning that the bus can be shared by several devices. Classic BM-style
Asynchronous Bit-Bang Mode is also supported, but has been enhanced to give the user access to the device’s
internal RD# and WR# strobes.
FTDI provide a royalty free Virtual Com Port (V.C.P) driver that makes the peripheral ports look like a standard COM
port to the PC. Most existing software applications should be able interface with the Virtual Com Port simply by
reconfiguring them to use the new ports created by the driver. Using the VCP drivers an application programmer would
communicate with the device in exactly the same way as they would a regular PC COM port - using the Windows
VCOMM API calls or a COM port library. The FT2232L driver also incorporates the functions defined for FTDI’s D2XX
drivers, allowing applications programmers to interface software directly to the device using a Windows DLL. Details of
the driver and the programming interface can be found on FTDI’s website at
DS2232L Version 1.4
© Future Technology Devices International Ltd. 2005 Page 2 of 54

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