DLP-245SY-G datasheet, PDF - EEWORLD Datasheet

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DLP-245SY-G: DescriptionInterface Development Tools USB/Micro Dev Board; CategoryDevelopment board/suite/development tools; File Size245KB，14 Pages; ManufacturerDLP Design

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DLP-245SY-G Overview

Interface Development Tools USB/Micro Dev Board

DLP-245SY-G Parametric

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Product Category	Interface Development Tools
Manufacturer	DLP Design
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DLP-245SY-G

*LEAD-FREE*

USB / Microcontroller Module

The DLP-245SY-G combines the 4

generation FT245RL USB interface IC from FTDI with a

Parallax SX48 microcontroller to form a rapid development tool. The SX48 microcontroller

is preprogrammed with basic functionality for accessing the port pins and can be

reprogrammed with user developed firmware via a 5-pin header (4 pins used for

compatibility with device programmers and debuggers from other manufacturers).

DLP-245SY-G FEATURES

•

Send/receive data over USB to a host computer at up to 7 megabits per second

20 digital I/O lines plus the 8-bit data bus available for interfacing to user electronics

Ubicom SX48 processor with 4K FLASH ROM, 262 bytes RAM, and a 2K (256x8) EEPROM

Microcontroller Supervisor -- microcontroller held in reset until supply voltage reaches stable

operating level

“Token I/O” code preprogrammed into the SX48’s ROM for basic port pin input/output

capability including access to the EEPROM, and external digital temperature sensors. ROM

can be easily erased and reprogrammed using a device programmer (purchased separately)

•

No in-depth knowledge of USB is required as all USB protocol is handled automatically by the

on-board FT245RL and its support circuitry

Royalty-free device drivers eliminate the need for USB driver development

Required 5V supply can be taken directly from the USB port or supplied by user electronics

When the host sends data to the peripheral over USB, the FT245RL will take RXF# low to let the

microcontroller know that at least one byte of data is available. The microcontroller then reads

the data until RXF# goes high indicating that no more data is available to read.

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 FT245RL always transfers

data at its fastest rate (up to 3 megabits per second using VCP drivers) regardless of the

application’s baud-rate setting. The latest versions of the drivers are available for download from

DLP Design’s website at http://www.dlpdesign.com.

DRIVER SOFTWARE

FTDI's VCP (virtual COM port) driver-executable files are provided royalty free on the condition

that they are used only with designs incorporating an FTDI device (i.e. the FT245RL and

DLP-245SY-G). The latest version of the drivers can be downloaded from dlpdesign.com or

ftdichip.com. Once loaded, the VCP drivers allow your application software running on the host

PC to communicate with the DLP-245SY-G as though it were connected to a COM (RS-232) port.

In addition to VCP drivers, FTDI's D2XX direct drivers for Windows offer an alternative solution to

the VCP drivers that allow application software to interface with the DLP-245SY-G using a DLL

instead of a virtual com port. The architecture of the D2XX drivers consists of a Windows WDM

driver that communicates with the FT245RL device via the Windows USB stack and a DLL that

interfaces the application software (written in VC++, C++ Builder, Delphi, VB, etc.) to the WDM

driver. An INF installation file, uninstaller program, and D2XX Programmer’s Guide complete the

package.

The D2XX direct drivers add support for simultaneous access and control of multiple FT245RL

devices. The extended open function (FT_OpenEx) allows the device to be opened either by its

product description or serial number, both of which can be programmed to be unique. The list

devices function (FT-ListDevices) allows the application software to determine which devices are

currently available for use, again by product description or by serial number.

Several new features have been recently added to the D2XX drivers. Functions are provided to

program the EEPROM (FT_EE_Program) and read the EEPROM (FT_EE_Read). Unused space

in the EEPROM is called the user area (EEUA), and functions are provided to access the EEUA.

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