Document Reference No.: FT_000165
V2DIP1-64 VNCL2-64Q Development Module Datasheet Version 1.01
Clearance No.: FTDI# 154
3.4 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. Further details on the UART interface are available on the the Vinculum-II datasheet please
refer to:- FTDI website
3.4.1 Signal Description – UART Interface
The UART signals can be programmed to a choice of available I/O pins. Table 3.3 explains the available
pins for each of the UART signals.
Available Pins
Name
Type
Description
J2-14, J1-17, J1-24, J1-29, J2-28, J2-
23, J1-3, J1-7, J2-8, J2-4
Transmit asynchronous data
output
uart_txd
uart_rxd
Output
Input
J2-17, J1-14, J1-18, J1-26, J1-30, J2-
27, J2-22, J1-4, J1-8, J2-7, J2-3
Receive asynchronous data input
J2-16, J1-15, J1-20, J1-27, J2-30, J2-
26, J1-1, J1-5, J1-9, J2-6, J2-2
uart_rts#
uart_cts#
Output
Input
Request To Send Control Output
Clear To Send Control Input
J2-15, JI-16, J1-21, J1-28, J2-29, J2-24,
J1-2, J1-6, J2-9, J2-5, J2-1
J2-14, J1-17, J1-24, J1-29, J2-28, J2-
23, J1-3, J1-7, J2-8, J2-4
Data Acknowledge (Data
Terminal Ready Control) Output
uart_dtr#
Output
J2-17, J1-14, J1-18, J1-26, J1-30, J2-
27, J2-22, J1-4, J1-8, J2-7, J2-3
Data Request (Data Set Ready
Control) Input
uart_dsr#
uart_dcd#
Input
Input
J2-16, J1-15, J1-20, J1-27, J2-30, J2-
26, J1-1, J1-5, J1-9, J2-6, J2-2
Data Carrier Detect Control Input
Ring Indicator Control Input. RI#
low can be used to resume the
PC USB Host controller from
suspend.
J2-15, JI-16, J1-21, J1-28, J2-29, J2-24,
J1-2, J1-6, J2-9, J2-5, J2-1
uart_ri#
Input
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
J2-14, J1-17, J1-24, J1-29, J2-28, J2-
23, J1-3, J1-7, J2-8, J2-4
uart_tx_active
Output
Table 3.3 - Data and Control Bus Signal Mode Options – UART
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