ft8u245am Future Technology Devices International Ltd., ft8u245am Datasheet
ft8u245am
Available stocks
Related parts for ft8u245am
ft8u245am Summary of contents
Page 1
... Single Supply Operation GENERAL DESCRIPTION The FT8U245AM provides an easy cost-effective method of transferring data to / from a peripheral and a host P. 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 ...
Page 2
... Figure 1 – FT8U245AM Block Diagram ( Simplified ) VCC 3.3 Volt 3V3OUT LDO Regulator USBDP USB Transceiver USBDM USB DPLL XTOUT 6MHZ Oscillator XTIN RCCLK Figure 2 – FT8U245AM I.C. Pinout EESK EEDATA VCC RESET# TEST 3V3OUT USBDP USBDM Future Technology Devices Intl. FIFO Receive Buffer ...
Page 3
... Fifo Receive Buffer ( 128 bytes ) Data sent from the USB Host to the FIFO via the USB data out endpoint is stored in the FIFO Receive Buffer and is removed from the buffer by reading the FIFO contents using RD#. Future Technology Devices Intl. FT8U245AM Preliminary Information Rev 0.9 – Subject to Change ...
Page 4
... The FT8U245AM uses an external 93C46 EEPROM to customise the USB VID, PID, Serial Number and Strings of the FT8U245AM for OEM applications. The FT8U245 Virtual Com Port Drivers rely on a unique device serial number for to bind a unique virtual COM port to each individual device. ...
Page 5
... When low, allows the EEPROM contents to be accessed via the Data Bus. Device - +4.4 volt to +5.25 volt Power Supply Pins Device – Ground Supply Pins Device - Analog Power Supply for the internal x8 clock multiplier Device - Analog Ground Supply for the internal x8 clock multiplier FT8U245AM Preliminary Information Rev 0.9 – Subject to Change ...
Page 6
... Pre-Charge Time T3 RD Active to Valid Data T4 Valid Data Hold Time from RD inactive T5 RD Inactive to RXF# T6 RXF inactive after RD cycle Future Technology Devices Intl valid data FT8U245AM Preliminary Information Rev 0.9 – Subject to Change T6 T2 Min Max Unit ...
Page 7
... Data Setup Time before WR inactive T10 Data Hold Time from WR inactive T11 WR Inactive to TXE# T12 TXE inactive after RD cycle Future Technology Devices Intl. T11 T7 T10 T9 valid data FT8U245AM Preliminary Information Rev 0.9 – Subject to Change T12 T8 Min Max Unit ...
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 Information Rev 0.9 – Subject to Change 7 9 0.37 +/- 0.07 0.09 Min 0.09 Min 0.16 Max 0.2 Max 0.35 +/- 0.05 All dimensions in millimetres ...
Page 9
... Max Units 4.4 5. 250 0.6 v 2.7 v 0.2 v 0.8 2.5 v 0.8 2.0 v 0.3v 2.8 FT8U245AM Preliminary Information Rev 0.9 – Subject to Change 150 -0.5v to +6.00v -0.5v to VCC + 0.5v -0.5v to VCC + 0.5v 24mA 24mA 500mW Conditions Normal Operation USB Suspend Voh = VCC – 0.5v Vol = + 0. 1. 15k to GND ...
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
USB Device Descriptors Note replaced by E2Rom Value modified by configuration option LABEL : Device_Des; 0010 12 Val : Device_Len;{length of this descriptor in bytes} 0011 01 Val : $01;{Device descriptor type} 0012 10 01 Val ...
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 ...