ABSOLUTE MAXIMUM RATINGS
? Storage Temperature
? Ambient Temperature (Power Applied)
? VCC Supply Voltage
? DC Input Voltage: Inputs
? DC Input Voltage: High-Impedance Bidirectionals
? DC Output Current: Outputs
-65°C to +150°C
-40 to +85°C
-0.5V to +6.00V
-0.5V to VCC + 0.5V
-0.5V to VCC + 0.5V
24mA
D.C. CHARACTERISTICS (AMBIENT TEMPERATURE: -40 TO 85°C)
? VCC Operating-Supply Voltage
? VCCIO Operating-Supply Voltage
? Operating Supply Current
? Operating Supply Current
4.0 - 5.25V
4.0 - 5.25V
15mA (Normal Operation)
100uA USB Suspend
1.0 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 I/O ports.
To send data from the peripheral to the host computer, simply write the byte-wide data into the
module when TXE# is low. If the (128-byte) transmit buffer fills up or is busy storing the
previously-written byte, the device takes 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 device will take RXF# low to let the
peripheral know that at least one byte of data is available. The peripheral then reads the data
until RXF# goes high, thereby indicating that no more data is available to be 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 device 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 www.dlpdesign.com .
Rev. 1.0 (November 2008)
3
? DLP Design, Inc.