USB-COM422-PLUS-4 FTDI, USB-COM422-PLUS-4 Datasheet - Page 14

• Manufacturer Part Number: USB-COM422-PLUS-4
• Description: MODULE, DEV, USB-RS422, 4 COM PORT
• Manufacturer: FTDI
• Type: Developmentr

Specifications of USB-COM422-PLUS-4

• 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: 2KB Transmit Buffer, 2KB Receive Buffer
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3
3.1
3.1.1 USB
The USB-COM422-PLUS4 is a downstream USB 2.0 High-speed Device. A standard USB “mini B”
receptacle is mounted inside the USB-COM422-PLUS4 to facilitate connection to an upstream USB Host or
Hub.
Table 3.1 – USB "mini B" Receptacle Pin-Out
3.1.2 RS422
The four RS422 ports are 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
5
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
ID
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
No connected
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_000152
USB-COM422-PLUS4 Datasheet
Clearance No.: 107
Version 1.1
13