USB-COM422-PLUS-1 FTDI, USB-COM422-PLUS-1 Datasheet - Page 12

• Manufacturer Part Number: USB-COM422-PLUS-1
• Description: MODULE, DEV, USB-RS422, 1 COM PORT
• Manufacturer: FTDI
• Type: Development Moduler

Specifications of USB-COM422-PLUS-1

• Mcu Supported Families: FT232R, FT2232, FT232BM
• Kit Features: Works With USB 1.1 & 2.0 Host And Hub Ports, FIFO
• Svhc: No SVHC (18-Jun-2010)
• 2.0 Host And Hub Ports, Fifo: 128Byte Transmit Buffer, 256Byte Receive Buffer
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3
3.1
3.1.1 USB
The USB-COM422-Plus1 is a downstream USB 2.0 Device. A standard USB Series “B” receptacle is
reference to USB-F-1001 to facilitate connection to an upstream USB Host or Hub.
Table 3.1 USB "B" Receptacle Pin-Out
3.1.2 RS422
The RS422 port is configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin connector.
Pin assignments are according to TIA/EIA-422.
Table 3.2 DE-9P RS422 Pin-Out
Pin Number
Pin Number
Connections
Shield
External Connectors
1
2
3
4
1
2
3
4
5
6
7
8
9
Case Ground
Bidirectional
Bidirectional
Pin Type
Pin Type
Ground
Ground
Output
Output
Output
Output
Power
Input
Input
Input
Input
Copyright © 2010 Future Technology Devices International Limited
Description
VBUS = USB Power provided from upstream USB Host or Hub
D– = USB data signal, negative polarity
D+ = USB data signal, positive polarity
GND = USB signal ground
Drain = typically connected to the host PC case
Description
TXD- = Transmit Data, negative polarity
TXD+ = Transmit Data, positive polarity
RXD+ = Receive Data, positive polarity
RXD- = Receive Data, negative polarity
GND = signal ground
RTS- = Request To Send, negative polarity
RTS+ = Request To Send, positive polarity
CTS+ = Clear To Send, positive polarity
CTS- = Clear To Send, negative polarity
Document Reference No.: FT_000131
USB-COM422-PLUS1 Datasheet
Clearance No.: FTDI# 94
Version 1.1
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