DLP-2232PB DLP Design Inc, DLP-2232PB Datasheet - Page 3

• Manufacturer Part Number: DLP-2232PB
• Description: Interface Modules & Development Tools 50P-DIP USB-FIFO Module
• Manufacturer: DLP Design Inc

Specifications of DLP-2232PB

• Interface Type: USB
• Data Bus Width: 8 bit
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: 16F877A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

GENERAL DESCRIPTION
The DLP-2232PB provides a cost-effective, microcontroller-based method of interfacing an
electronic peripheral to a host computer via USB.
To send data from the peripheral to the host computer, the microcontroller simply writes the
byte-wide data into the FT2232C when TXE# is low. If the FT2232C’s transmit buffer fills up or is
busy storing the previously written byte, it will take its TXE# high in order to stop further data from
being written until some of the FIFO data has been transferred over USB to the host.
When the host sends data to the peripheral over USB, the FT2232C 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 FT2232C always transfers
data at its fastest rate 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.
FIRMWARE UPLOAD APPLICATION
As mentioned above, the DLP-2232PB is shipped with its microcontroller pre-programmed with
firmware for basic port pin input/output capability including access to the A/D, EEPROM, and
external digital temperature sensors. However, if required, the Flash program memory can be
erased and reprogrammed with user supplied hex code using a firmware upload application that
can be downloaded from the DLP-2232PB product page at www.dlpdesign.com. Firmware can
also be reprogrammed into the Flash program memory via a 5-pin header and user-supplied
compatible programmer.
DRIVER SOFTWARE
The new combined Windows VCP / D2XX drivers for FT2232C are now available for on-line
download. These act as VCP Drivers for Windows 98 / ME / 2000 / XP and D2XX drivers for
Windows 2000 / XP. In the near future, FTDI will be publishing a version including D2XX support
for Windows 98 / ME.
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