Spectrum Digital TMS320F240 Technical Reference page 27

2.9 Onboard Serial Interface
The EVM320F240 has a TL16C550 UART which provides an additional serial
interface. This UART is mapped into I/O space at locations 0x0010 to 0x0018.
This device allows users to use this resource for data logging, code debugging and
other applications.
This UART is brought out to connector P7 on the EVM320F240. Connector P7 is a
DB9 female connector. The pin positions for the P4 connector as viewed from the edge
of the EVM320F240.
The pin numbers and their corresponding signals are shown in the table below:
Jumper JP11 allows the generation of a system reset from the serial port. If jumper JP11 is in
the 1-2 position a reset will occur when the DTR- signal is brought active low.
To use the UART you must enable the clockout of the F240.
You must also make sure the number of wait states is set correctly
in the WSGR register.
5
Table 8: P7 RS232 Pinout
Pin # PC (female)
2 Rx, input
3 Tx, output
4 DTR, output
5 GND
8 CTS, input
NOTE:
4 3 2 1
8
9 7 6
SD EVM
Tx, output
Rx, input
Reset/CTS,
input
GND
RTS, output
Spectrum Digital, Inc
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