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DLP-USB245M User Manual

USB to FIFO Parallel Interface Module

The DLP-USB245M is the 2nd generation of DLP Design’s USB adapter. This device adds extra functionality to

it’s DLP-USB1 predecessor with a reduced component count and a new low price.

DLP-USB245M FEATURES

• 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 module

• FTDI’s Virtual COM port drivers eliminate the need

for USB driver development in most cases.

• Integrated 3.3v Regulator – No External Regulator

Required

• Integrated Power-On-Reset circuit

• Integrated 6MHz – 48Mhz clock multiplier PLL

• USB Bulk or Isocronous data transfer modes

• 4.4v - 5.25v Single Supply taken directly from the

USB port

• UHCI / OHCI / EHCI host controller compatible

• USB 1.1 and USB 2.0 compatible

• USB VID, PID, Serial Number and Product

Description

• Strings stored in on-board EEPROM.

• EEPROM programmable on-board via USB

• VIRTUAL COM PORT ( VCP ) DRIVERS for

- Windows 98 and Windows 98 SE

- Windows 2000 / ME / XP

- Windows CE **

- MAC OS-8 and OS-9

- MAC OS-X

- Linux 2.40 and greater

• D2XX ( USB Direct Drivers + DLL S/W Interface )

- Windows 98 and Windows 98 SE

- Windows 2000 / ME / XP

[ ** = In planning or under development ]

APPLICATION AREAS

• Rapid Prototype Development

• USB ISDN and ADSL Modems

• High Speed USB PDA Interface

• USB Interface for Digital Cameras

• USB Interface for MP3 players

• High Speed USB Instrumentation

• USB Smart Card Readers

• Set Top Box (S.T.B.) PC-USB interface

• USB Hardware Modems

• USB Wireless Modems

• USB Bar Code Readers

Summary of content (15 pages)

PAGE 1
DLP-USB245M User Manual USB to FIFO Parallel Interface Module The DLP-USB245M is the 2nd generation of DLP Design’s USB adapter. This device adds extra functionality to it’s DLP-USB1 predecessor with a reduced component count and a new low price.
PAGE 2
DLP-USB245M User Manual GENERAL DESCRIPTION The DLP-USB245M provides an easy cost-effective method of transferring data to / from a peripheral and a host at up to 8 Million bits (1-Megabyte) per second. Its simple FIFO-like design makes it easy to interface to any microcontroller or microprocessor via IO ports. To send data from the peripheral to the host computer simply write the byte wide data into the module when TXE# is low.
PAGE 3
DLP-USB245M User Manual DRIVER SOFTWARE FTDI’s VCP (Virtual COM Port) driver executable files are provided royalty-free on the condition that they are only used with designs incorporating an FTDI device (ie the FT245BM and DLP-USB245M). The latest version of the drivers can be downloaded from dlpdesign.com or ftdichip.com. The VCP driver download file is a combined set of drivers for Windows ‘98, Windows ME and Windows 2000/XP. Unzip the file to a blank floppy disk or folder on your PC.
PAGE 4
DLP-USB245M User Manual EEPROM WRITE UTILITY The DLP-USB245M has the option to accept manufacturer-specific information that is written into the 93C46 EEPROM. Parameters that can be programmed include the VID and the PID identifiers, the manufacturer’s product string and a serial number. FTD2XXST is the latest EEPROM serializer and testing utility for the FT245BM device. It replaces the VCP based 232Prog utility.
PAGE 5
DLP-USB245M User Manual in step one. Windows will then complete the installation of the device drivers for the DLP-USB245M board. The next time the DLP-USB245M module is attached, the host PC will immediately load the correct drivers without any prompting. Reboot the PC if prompted to do so. 5. Run the serializer program and write the VID (0403), PID (6001), a description string of your choosing and manufacturers ID as instructed in the instruction manual that was downloaded with the serializer software.
PAGE 6
DLP-USB245M User Manual Table 1 - DLP-USB245M PINOUT DESCRIPTION 1 24 12 13 Pin# Description 1 BOARD ID (Out) Identifies the board as either a DLP-USB245M or DLP-USB232M. High for DLPUSB232M and low for DLP-USB245M. 2 Ground 3 RESET# (In) Can be used by an external device to reset the FT245BM. If not required this pin must be tied to VCC. 4 RESETO# (Out) Output of the internal Reset Generator. Stays high impedance for ~ 2ms after VCC > 3.
PAGE 7
DLP-USB245M User Manual 9 SND/WUP (In) If the DLP-USB245M is in USB suspend, a positive edge on this pin (WAKEUP) initiates a remote wakeup sequence. If the device is active (not in suspend) a positive edge on this pin (SEND) causes the data in the write buffer to be sent to the PC on the next USB Data-In request regardless of how many bytes are in the buffer. 10 VCC-IO (In) 3.0 volt to +5.25 volt VCC to the UART interface pins 10..12, 14..16 and 18..25. When interfacing with 3.
PAGE 8
DLP-USB245M User Manual Device Configuration Examples Microcontroller DLP-USB245M 8 data WR USB 'B' Connector RD# TXE# RXF# Basic Connection to a Microcontroller USB Bus Powered and Self Powered Configuration Figure 1 illustrates a typical USB bus powered configuration. A USB Bus 1 24 Figure 1 Powered device gets its power from the USB bus.
PAGE 9
DLP-USB245M User Manual 3.3V Figure 3 8 Microcontroller data 3.3V WR RD# TXE# RXF# 3 10 11 12 Bus-Powered 5V System with 3.3 Volt Logic Interface Figure 3 shows how to configure the DLP-USB245M to interface with a 3.3v logic device. In this example, the target electronics provides the 3.3 volts via the VCCIO line (pin 10) which in turn will cause the FIFO interface IO pins to drive out at 3.3v level.
PAGE 10
DLP-USB245M User Manual DLP-USB245M TIMING DIAGRAM – FIFO READ CYCLE T6 T5 RXF# T1 T2 RD# T3 T4 D D[7..0] Description Min Max Unit Valid data Time Description Min Max T1 RD Active Pulse Width 50 ns T2 RD to RD Pre-Charge Time 50 ns T3 RD Active to Valid Data T4 Valid Data Hold Time from RD Inactive 10 T5 RD Inactive to RXF# 5 T6 RXF inactive after RD cycle 80 30 Unit ns ns 25 ns ns DLP-USB1 TIMING DIAGRAM – FIFO WRITE CYCLE T12 T11 TXE# T7 T8 WR T10 T9 D[7..
PAGE 11
DLP-USB245M User Manual Mechanical Drawings (PRELIMINARY) Inches(millimeters) unless otherwise noted 1.5 typ (38.1 typ) .10 typ (2.54 typ) .235 typ (6.0 typ) .65 typ (16.5 typ) .50 typ (12.7 typ) .32 typ (8.0 typ) .52 typ dia (13.2 typ) .19 typ dia (.46 typ) .16 typ (4.2 typ) .6 typ (15.2 typ) .7 typ (17.8 typ) Copyright © DLP Design 2002 .36 typ dia (9.
PAGE 12
DLP-USB245M User Manual Absolute Maximum Ratings These are the absolute maximum ratings for the FT245BM device in accordance with the Absolute Maximum Rating System (IEC 60134). Exceeding these may cause permanent damage to the device. • • • • • • • • • Storage Temperature ……………………………………………………. –65oC to + 150oC Ambient Temperature ( Power Applied )……………………………….. 0oC to + 70oC VCC Supply Voltage ……………………………………………….…….. -0.5v to +6.00v DC Input Voltage - Inputs ……………………………………………….. -0.5v to VCC + 0.
PAGE 13
DLP-USB245M User Manual RESET# Pin Characteristics Parameter Description Min Typ Max Units Vin Input Switching Threshold 1.1 1.5 1.9 V VHys Input Switching Hysteresis 200 Conditions Note 1 mV Note 1 – Inputs have an internal 200k pull-up resistor to VCCIO. RSTOUT Pin Characteristics Parameter Description Min Typ Max Units Voh Output Voltage High 3.0 - 3.
PAGE 14
DLP-USB245M User Manual Disclaimer Neither the whole nor any part of the information contained in, or the product described in this datasheet, 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.
PAGE 15
A B C D 5 Board ID GND RESET# RESETO# GND 3V3OUT GND SLEEP SND/WUP VCC-IO EXTVCC PORTVCC 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 GND PORTVCC J2 . Y1 6MHz 2 D0 D1 D2 D3 D4 D5 D6 D7 RD# WR TXE# RXF# DLP-USB245M USB Conn. 1 2 3 4 CN1 4 . . 1 3 C5 .01 1 Board ID C9 27pF C8 27pF USBVCC 27R R3 R5 100K RESET# R4 3 Populate for DLP-USB245M R6 100K .033 C7 2.2K R8 1.