DLP-EVALS DLP Design Inc, DLP-EVALS Datasheet - Page 4

• Manufacturer Part Number: DLP-EVALS
• Description: Interface Modules & Development Tools Evaluation Board
• Manufacturer: DLP Design Inc

Specifications of DLP-EVALS

• Data Bus Width: 8 bit
• Product: Interface Modules
• For Use With/related Products: SX28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The "Blink LED’s" function writes data to the DLP-EVALx board via the DLP-USB245M board that
performs a binary count with the LED’s. A slider control is provided to increase and decrease the rate at
which the individual bytes are sent. When the slider speed control is set to the fastest position, a 64-byte
packet is repeatedly sent to the adapter to flash the LED’s at the speed of the microcontroller.
The "Send 128 Bytes" function builds and sends a 128-byte packet of data to the microcontroller. The
microcontroller simply reads and discards the data from the FIFO memory in the FT245BM on the
DLP-USB245M adapter board. The speed of this test is limited by the speed of the microcontroller.
When the button on the DLP-EVALx board is pressed, the microcontroller creates and sends a 512-byte
packet of data to the host via the DLP-USB245M. The returned data is presented in the application's list
box.
TEMPERATURE SENSOR WIRING
The DS-18S20 is interfaced to the microcontroller using a standard port pin and a 1.5K-ohm pull-up
resistor. The DS-18S20 can be removed from the DLP-EVALx PC board for the purpose of locating the
DS-18S20 at a significant distance from the DLP-EVALx board using Category 5 cable.
Care must be taken to ensure correct wiring as the distance between the DLP-EVALx and DS-18S20
sensor increases. Category 5 network cable must be used for distances greater than about 10 feet to
keep the capacitance low. Use one twisted pair for power and ground, and a second twisted pair for data
and ground.
DLP-EVALx
Revision 1.0
Pin 1
DS18S20
2. DATA
3. VCC
1. GND
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