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PDF FT240X Data sheet ( Hoja de datos )

Número de pieza FT240X
Descripción USB 8-BIT FIFO IC
Fabricantes Future Technology Devices 
Logotipo Future Technology Devices Logotipo



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FT240X USB 8-BIT FIFO IC Datasheet
Version 1.3
Document No.: FT_000626 Clearance No.: FTDI# 259
Future Technology
Devices International Ltd.
FT240X
(USB 8-BIT FIFO IC)
The FT240X is a USB to parallel FIFO
interface with the following advanced
features:
Single chip USB to parallel FIFO bidirectional
data transfer interface.
Entire USB protocol handled on the chip. No
USB specific firmware programming required.
Fully integrated 2048 byte multi-time-
programmable (MTP) memory, storing device
descriptors and FIFO I/O configuration.
Fully integrated clock generation with no
external crystal required plus optional clock
output selection enabling glue-less interface to
external MCU or FPGA.
Data transfer rates up to 1Mbyte / second.
512 byte receive buffer and 512 byte transmit
buffer utilising buffer smoothing technology to
allow for high data throughput.
FTDI’s royalty-free Virtual Com Port (VCP) and
Direct (D2XX) drivers eliminate the
requirement for USB driver development in
most cases.
Configurable FIFO interface I/O pins.
Synchronous and asynchronous bit bang
interface options.
USB Battery Charger Detection. Allows for USB
peripheral devices to detect the presence of a higher
power source to enable improved charging.
Device supplied pre-programmed with unique USB
serial number.
USB Power Configurations; supports bus- powered,
self-powered and bus-powered with power
switching.
Integrated +3.3V level converter for USB I/O.
True 3.3V CMOS drive output and TTL input;
operates down to 1V8 with external pull-ups.
Tolerant of 5V input.
Configurable I/O pin output drive strength; 4
mA(min) and 16 mA(max).
Integrated power-on-reset circuit.
Fully integrated AVCC supply filtering - no external
filtering required.
+5V Single Supply Operation.
Internal 3V3/1V8 LDO regulators
Low operating and USB suspend current; 8mA
(active-typ) and 125uA (suspend-typ).
UHCI/OHCI/EHCI host controller compatible.
USB 2.0 Full Speed capable.
Extended operating temperature range; -40 to 85C.
Available in compact Pb-free 24 Pin SSOP and QFN-
24 packages (both RoHS compliant).
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminary
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH United Kingdom. Scotland Registered Company Number: SC136640
Copyright © 2013 Future Technology Devices International Limited
1

1 page




FT240X pdf
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.3
Document No.: FT_000626 Clearance No.: FTDI# 259
Table of Contents
1 Typical Applications...................................................................... 2
1.1 Driver Support .................................................................................... 2
1.2 Part Numbers...................................................................................... 2
1.3 USB Compliant .................................................................................... 3
2 FT240X Block Diagram ................................................................. 4
3 Device Pin Out and Signal Description .......................................... 7
3.1 24-LD SSOP Package .......................................................................... 7
3.2 SSOP Package Pin Out Description...................................................... 7
3.3 QFN-24 Package ................................................................................. 9
3.4 QFN-24 Package Signal Description .................................................... 9
3.5 CBUS Signal Options ......................................................................... 11
3.6 FT240X FIFO READ Timing Diagrams ................................................ 12
3.7 FT240X FIFO WRITE Timing Diagrams .............................................. 13
4 Function Description................................................................... 14
4.1 Key Features..................................................................................... 14
4.2 Functional Block Descriptions ........................................................... 15
5 Devices Characteristics and Ratings ........................................... 16
5.1 Absolute Maximum Ratings............................................................... 16
5.2 ESD and Latch-up Specifications ....................................................... 16
5.3 DC Characteristics............................................................................. 17
5.4 MTP Memory Reliability Characteristics ............................................ 21
5.5 Internal Clock Characteristics........................................................... 21
6 USB Power Configurations.......................................................... 22
6.1 USB Bus Powered Configuration ...................................................... 22
6.2 Self Powered Configuration .............................................................. 23
6.3 USB Bus Powered with Power Switching Configuration .................... 24
7 Application Examples ................................................................. 25
7.1 USB to MCU FIFO Interface ............................................................... 25
7.2 Battery Charge Detection.................................................................. 26
8 Internal MTP Memory Configuration ........................................... 28
8.1 Default Values .................................................................................. 28
8.2 Methods of Programming the MTP Memory....................................... 29
8.2.1 Programming the MTP memory over USB...................................................................... 29
8.3 Memory Map ..................................................................................... 30
9 Package Parameters................................................................... 31
Copyright © 2013 Future Technology Devices International Limited
5

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FT240X arduino
3.5 CBUS Signal Options
FT240X USB 8-BIT FIFO IC Datasheet
Version 1.3
Document No.: FT_000626 Clearance No.: FTDI# 259
The following options can be configured on the CBUS I/O pins. CBUS signal options are common to both
package versions of the FT240X. These options can be configured in the internal MTP memory using the
software utility FT_PPROG, which can be downloaded from the FTDI Utilities (www.ftdichip.com). The
default configuration is described in Section 8.
CBUS
Signal
Option
Available On CBUS Pin
Description
TRI-STATE
CBUS5, CBUS6
IO Pad is tri-stated
DRIVE 1
CBUS5, CBUS6
Output a constant 1
DRIVE 0
CBUS5, CBUS6
Output a constant 0
PWREN#
CBUS5, CBUS6
Output is low after the device has been configured by
USB, then high during USB suspend mode. This output can
be used to control power to external logic P-Channel logic
level MOSFET switch. Enable the interface pull-down
option when using the PWREN# in this way.
SLEEP#
CBUS5, CBUS6
Goes low during USB suspend mode. Typically used to
power down an external TTL to RS232 level converter IC
in USB to RS232 converter designs.
CLK24MHz
CBUS5, CBUS6
24 MHz Clock output.*
CLK12MHz
CBUS5, CBUS6
12 MHz Clock output.*
CLK6MHz
CBUS5, CBUS6
6 MHz Clock output.*
BCD Charger
CBUS5, CBUS6
Battery charge Detect, indicates when the device is
connected to a dedicated battery charger host. Active high
output.
BCD
Charger#
CBUS5, CBUS6
Inverse of BCD Charger
BitBang_WR#
CBUS5, CBUS6
Synchronous and asynchronous bit bang mode WR#
strobe output.
BitBang_RD#
CBUS5, CBUS6
Synchronous and asynchronous bit bang mode RD# strobe
output.
VBUS Sense
CBUS5, CBUS6
Input to detect when VBUS is present.
Time Stamp
CBUS5, CBUS6
Toggle signal which changes state each time a USB SOF is
received
Keep_Awake#
CBUS5, CBUS6
Prevents the device from entering suspend state when
unplugged.
Table 3.9 CBUS Configuration Control
*When in USB suspend mode the outputs clocks are also suspended.
Copyright © 2013 Future Technology Devices International Limited 11

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