ADSP-CM403F EZ-KIT Lite Evaluation System Manual
1-9
Using ADSP-CM403F EZ-KIT Lite
UART0 Interface (RS-232)
The ADSP-CM403F processor has three built-in universal asynchronous
transmitters (UARTs).
UART0
is connected to a RS-232 line transmitter.
UART0
has full RS-232 functionality via the Analog Devices ADM3252E
isolated line driver and receiver (
U23
).
The EZ-KIT Lite voltage isolation components are not intended
for protecting external products. The isolated ICs are used to show-
case Analog Devices product portfolio only. Adequate voltage
isolation of any external devices/boards is the user responsibility.
Pin
PC_02/UART0_TX/TRACE_D03/SPI0_RDY
of the processor is connected to
the ADM3315 device directly and used for UART transmit.
Pin
PC_01/UART0_RX/SMC0_A05/TM0_ACI5
is connected through SoftConfig
by default and used for UART receive. (This can be changed through
SoftConfig.)
By default, the
UART0 CTS
signal is not connected, and the
UART0 RTS
sig-
nal is connected to RS-232. Both connections can be changed through
SoftConfig.
The SoftConfig switches also allow the loopback of
CTS
and
RTS
. The
UART0 CTS
can be added as an input to the reset circuit through SoftCon-
fig. Refer to
Software-Controlled Switches (SoftConfig)
information.
For more information, refer to the UART example in the POST, which is
included in the ADSP-CM40x Enablement Software. Note that the loop-
back of
TX
and
RX
data is done through an external connector.
