FT245AM FTDI, FT245AM Datasheet

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FT245AM

Manufacturer Part Number
FT245AM
Description
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer
FTDI
Datasheet

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FEATURES
GENERAL DESCRIPTION
host P.C. at up to 8 Million bits ( 1 Megabyte ) per second. It’s simple FIFO-like design makes it easy to interface
to any CPU ( MCU ) either by mapping the device into the Memory / IO map of the CPU, using DMA or controlling
the device via IO ports.
transmitter empty status bit is not active. If the ( 384 byte ) transmit buffer fills up, the device de-asserts
transmit empty in order to stop further data being written to the device until some of the FIFO data has been
transferred over USB.
bit to let the peripheral know that data is available. The peripheral then reads the data until the receiver full
status bit goes inactive, indicating no more data is available to read.
software. Commands to set the baud rate are ignored – the device always transfers data at it’s fastest rate
regardless of the application’s baud rate setting.
Future Technology Devices Intl.
Single Chip Fast Data Transfer Solution
Send / Receive Data over USB at up to 1 M
Bytes / sec
384 byte FIFO Transmit buffer / 128 byte FIFO
receive buffer for high data throughput
Simple interface to CPU or MCU bus
No in-depth knowledge of USB required as all
USB Protocol is handled automatically within
the I.C.
FTDI’s Virtual COM port drivers eliminate the
need for USB driver development in most
cases.
Compact 32 pin ( 7mm x 7mm ) MQFP package
Integrated 6MHz - 48MHz Clock Multiplier aids
FCC and CE compliance
Integrated 3.3v Regulator – No External
Regulator Required
4.4v .. 5.25v Single Supply Operation
The FT8U245AM provides an easy cost-effective method of transferring data to / from a peripheral and a
To send data from the peripheral to the host P.C. simply write the byte wide data into the device when the
When the host P.C. sends data to the peripheral over USB, the device will assert the receiver full status
By using FTDI’s virtual COM Port drivers, the peripheral looks like a standard COM Port to the application
USB FIFO - Fast Parallel Data Transfer IC
FT8U245AM Preliminary Information Rev 0.9 – Subject to Change
Virtual COM Port Drivers for –
UHCI / OHCI Compliant
USB 1.1 Specification Compliant
USB VID, PID, Serial Number and Product
Description Strings in external E2PROM.
Windows 98 and Windows 98 SE
Windows 2000
Windows Millennium **
Apple iMAC **
Linux **
Application Areas
USB ISDN and ADSL Modems
High Speed USB
USB I/F for Digital Cameras
USB I/F for MP3 players
High Speed USB Instrumentation
USB
USB
Ù Ù
Ù Ù
USB data transfer cables
USB null-modem cables
Ù Ù
FT8U245AM
PDA Communications

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FT245AM Summary of contents

Page 1

... By using FTDI’s virtual COM Port drivers, the peripheral looks like a standard COM Port to the application software. Commands to set the baud rate are ignored – the device always transfers data at it’s fastest rate regardless of the application’ ...

Page 2

... Bytes Serial Interface USB Engine Protocol Engine ( SIE ) FIFO Transmit Buffer 384 Bytes GND 48MHz x8 Clock RESET# Multiplier 12MHz TEST 32 1 FTDI FT245AM XXYY FT8U245AM Preliminary Information Rev 0.9 – Subject to Change FIFO Controller EEPROM Interface ...

Page 3

FT8U245AM - FUNCTIONAL BLOCK DESCRIPTION 3.3V LDO Regulator The 3.3V LDO Regulator generates the 3.3 volt reference voltage for driving the USB transceiver cell output buffers. It requires an external decoupling capacitor to be attached to the 3V3OUT regulator output ...

Page 4

FIFO Transmit Buffer ( 384 bytes ) Data written into the FIFO using WR# is stored in the FIFO Transmit Buffer. The Host removes Data from the FIFO Transmit Data by sending a USB request for data from the device ...

Page 5

Table 1 - FT8U245AM - PINOUT DESCRIPTION Pin # Signal Type 7 USBDP I/O 8 USBDM I/O 6 3V3OUT OUT XTIN 27 28 XTOUT OUT 31 RCCLK I/O 4 RESET# 32 EECS I/O 1 EESK I/O 2 EEDATA I/O 5 ...

Page 6

FT8U245AM TIMING DIAGRAM – FIFO READ CYCLE RXF# RD# D0..D7 Time Description T1 RD Active Pulse Width Pre-Charge Time T3 RD Active to Valid Data T4 Valid Data Hold Time from RD inactive T5 RD Inactive ...

Page 7

FT8U245AM TIMING DIAGRAM – FIFO WRITE CYCLE TXE# WR D0..D7 Time Description T7 WR Active Pulse Width Pre-Charge Time T9 Data Setup Time before WR inactive T10 Data Hold Time from WR inactive T11 WR Inactive ...

Page 8

Figure 3. FT8U245AM - PACKAGE DESCRIPTION – QFP 7mm x 7mm 32 Pin # +/- 1 0.05 Min 0.2 Min 0.15 Max Future Technology Devices Intl 0 0.25 0.6 +/- 0.15 FT8U245AM Preliminary ...

Page 9

Absolute Maximum Ratings Storage Temperature ……………………………………………………. Ambient Temperature ( Power Applied )……………………………….. VCC Supply Voltage ……………………………………………….…….. DC Input Voltage - Inputs ……………………………………………….. DC Input Voltage - High Impedance Bidirectionals …………………… DC Output Current – Outputs …………………………………………… DC Output Current – ...

Page 10

... Please visit our internet site for the latest contact details of our Agents and Sales Representatives world-wide. Future Technology Devices Intl. Disclaimer Telephone : + 141 353 2565 Fax : + 141 353 2656 Email : support@ftdi.co.uk Internet : http://www.ftdi.co.uk FT8U245AM Preliminary Information Rev 0.9 – Subject to Change ...

Page 11

Appendix A USB Device Descriptors ...

Page 12

... Val : $00;{Device subclass ?} 0016 00 Val : $00;{Device protocol ?} 0017 08 Val : Max_Length;{maximum packet size} LABEL : Device_Des_Vendor; E 0018 03 04 Val : $03,$04;{Vendor ID FTDI} E 001A 01 60 Val : $01,$60;{product number 6001} LABEL : Device_Des_Vendor_End; E 001C 00 02 Val : $00,$02;{device release number 02.00} 001E 01 Val : $01;{index of string descriptor describing manufacturer} 001F 02 Val : $02 ...

Page 13

LABEL : Endpoint3_Des; {* end point descriptor *} 003B 07 Val : $07;{length of this descriptor in bytes} 003C 05 Val : $05;{End point descriptor} 003D 02 Val : 00000010b;{out endpoint at address 2} 003E 02 Val : 00000010b;{attribute as ...

Page 14

Appendix B EEPROM Data Structure ...

Page 15

... E2Rom Data example 0000 00 00 Val : $00,$00;{Configuration value} 0002 03 04 Val : $03,$04;{Vendor ID FTDI} 0004 01 60 Val : $01,$60;{product number 6001} 0006 00 02 Val : $00,$02;{device release number} 0008 A0 Val : 10100000b; 0009 2D Val : 45; {max power = 000A 00 00 Val : $00,$00;{reserved} 000C 00 00 Val : $00,$00;{reserved} 000E 94 VAL : PTR_ManStringDes ...

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