DLP-TXRX-G DLP Design Inc, DLP-TXRX-G Datasheet - Page 3

• Manufacturer Part Number: DLP-TXRX-G
• Description: MODULE USB-TO-TTL SRL UART CONV
• Manufacturer: DLP Design Inc
• Series: DLP-TXRXr

Specifications of DLP-TXRX-G

• Convert From (adapter End): USB
• Convert To (adapter End): DB9 Female
• Features: 2 Wires
• Interface Type: USB
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• For Use With/related Products: Windows® 98 or higher, Mac OS 8.5 or higher
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 813-1017

1.3 DTR Open Collector Output
Pin 4 of the DLP-TXRX-G is an open-collector output that is controlled by the DTR#
output of the FT232RL. Upon power up of the DLP-TXRX-G (i.e. when connected to
the host PC), pin 4 is initially driven low via an open-collector transistor until the host
application opens the COM port that the DLP-TXRX-G is assigned to. Once the port is
opened, pin 4 becomes high-impedance. From this point forward, the state of pin 4 can
be changed under software control via the user’s application program by setting and
clearing DTR#.
NOTE: if pin 4 is used to reset an external microcontroller, then upon power up the
processor will not run until the COM port is opened by the host application.
1.4 VCCIO Input
Pin 5 is used to provide power to the I/O pins of the FT232RL in instances where the
external microcontroller/DSP/FPGA/etc is operating at a voltage other than 5 volts. The
acceptable input voltage range on Pin 5 is 1.8 to 5.25 volts. If the external processor is
running at 5.0 volts then Pin 5 can be left disconnected.
If the external processor is running at a voltage other than 5 volts then the solder bridge at
location ‘5’ on the DLP-TXRX-G pcb must be removed and a solder bridge at location
‘3’ must be applied in order for the voltage applied to pin 5 to be used.
Rev 1.4 (Oct 2008)
3
DLP-TXRX DLP Design, Inc.