DLP-245SY-G

Overview

The DLP-245SY-G is a USB-to-microcontroller development module integrating an FTDI FT245RL USB interface IC and a Parallax SX48 microcontroller. It enables rapid peripheral prototyping by handling USB protocol automatically, requiring no in-depth USB knowledge from the user. The module supports data transfer rates up to 7 Mbps and provides 20 digital I/O lines plus an 8-bit data bus for interfacing with user electronics. Powered via USB or external supply, it includes preprogrammed Token I/O firmware for basic port access and EEPROM management.

Feature Summary

• Integrates FTDI FT245RL USB FIFO controller with Parallax SX48 microcontroller featuring 4K FLASH ROM, 262 bytes RAM, and 2K EEPROM.
• Supports USB 1.1 and 2.0 compatibility with royalty-free VCP and D2XX drivers for Windows, Mac OS, and Linux.
• Provides 20 digital I/O lines and an 8-bit data bus accessible via the SX48 processor.
• Includes preprogrammed Token I/O firmware for port pin control, EEPROM access, and DS18S20 temperature sensor communication.

Applications

• Prototype development
• USB ISDN and ADSL modems
• USB interface for digital cameras
• High-speed USB instrumentation
• USB smart-card readers

Procurement Notes

Verify that the specific unit received matches the DLP-245SY-G designation. Confirm the presence of the SX48 microcontroller and FT245RL interface IC on the board. Ensure the required 5V supply configuration (USB vs. external) is correctly set via pins 18, 19, and 20 before operation. Check for any physical damage to the 40-pin header connections.

Selection Notes

Select this module when a cost-effective method is needed to interface electronic peripherals to a host computer via USB without developing custom USB drivers. It is suitable for applications requiring immediate access to digital I/O ports and EEPROM storage through a preprogrammed firmware layer. Consider the SX48's memory constraints (4K Flash, 262 bytes RAM) for complex firmware requirements.

Part Context

This module serves as a rapid development tool within DLP Design's portfolio, combining established components (FT245RL and SX48) into a single evaluation platform. It bridges the gap between simple USB-to-serial adapters and fully custom USB device designs, allowing developers to test peripheral logic using standard COM port emulation or direct DLL interfaces.

Replacement Considerations

No direct public substitute part numbers are documented. Alternative solutions would require designing a custom PCB integrating an FT245RL and a compatible microcontroller, along with developing corresponding driver software and firmware.

FAQ

How is the power supply configured for the DLP-245SY-G?

The module can be powered directly from the USB port by connecting Pin 20 (PORTVCC) to Pin 19 (EXTVCC), or by supplying an external 4.4 to 5.25 volt source to Pin 19. Pins 18, 19, and 20 allow for this configuration selection.

What is the maximum data transfer rate supported?

The module supports data transmission over USB at up to 7 megabits per second. When using Virtual COM Port (VCP) drivers, the transfer rate is limited to 3 megabits per second regardless of baud rate settings.

Can the preprogrammed firmware on the SX48 be modified?

Yes, the SX48 microcontroller can be reprogrammed with user-developed firmware via a 5-pin header. The header uses 4 pins for compatibility with device programmers and debuggers from other manufacturers.