Document Reference No.: FT_000236
V2DIP1-48 VNC2-48 Development Module Datasheet Version 1.01
Clearance No.: FTDI# 153
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3.5 UART Interface
When the data and control buses are configured in UART mode, the interface implements a standard
asynchronous serial UART port with flow control. The UART can support baud rates from 300baud to
3Mbaud. The UART interface is described more fully in a Vinculum-II datasheet please refer to:- FTDI
website.
3.5.1 Signal Description – UART Interface
The UART signals can be programmed to a choice of I/O pin available. Table 3.4 explains the available
pins for each of the UART signals.
Available Pins
Name
Type
Description
J1-6, J1-11, J2-5, J2-10
J1-2, J1-8, J1-12, J2-9
J1-3, J1-9, J2-12, J2-8
J1-10, J2-11, J2-6
uart_txd
uart_rxd#
uart_rts#
uart_cts#
uart_dtr#
Output
Input
Transmit asynchronous data output
Receive asynchronous data input
Request To Send Control Output
Clear To Send Control Input
Output
Input
J1-6, J1-11, J2-5, J2-10
Output
Data Acknowledge (Data Terminal
Ready Control) Output
J1-2, J1-8, J1-12, J2-9
uart_dsr#
Input
Data Request (Data Set Ready
Control) Input
J1-3, J1-9, J2-12, J2-8
J1-10, J2-11, J2-6
uart_dcd#
uart_ri#
Input
Input
Data Carrier Detect Control Input
Ring Indicator Control Input.
uart_ri# low can be used to resume
the PC USB Host controller from
suspend.
J1-6, J1-11, J2-5, J2-10
uart_tx_active
Output
Enable Transmit Data for RS485
designs. uart_tx_active may be used
to signal that a transmit operation is
in progress.The uart_tx_active signal
will be set high one bit-time before
data is transmitted and return low
one bit time after the last bit of a
data frame has been transmitted
Table 3.4 - Data and Control Bus Signal Mode Options – UART Interface
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