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• UART over USB Connector (Default): Shunts installed over COM_SEL1.3‐COM_SEL1.1
and COM_SEL1.4‐COM_SEL1.2
• UART over 3‐Pin Header LAN1‐Shunts installed over COM_SEL1.3‐COM_SEL1.5 and
COM_SEL1.4‐COM_SEL1.6
The pin out for the connector is shown in the table and figure below:
Table 3.5: UART Path Select Connector pin out
Pin #
Signal Name
FT2232H (USB Chip)
1
Transmit
3
UART Transmit
5
MAX3221 Transmit
Wire pin1‐3 and pin2‐4
UART over the XDS100v1
6
4
2
3.2.5 DC_IN1, DC Power Input Jack Connector
DC_IN1 is a DC Power‐in Jack Connector for the stand‐alone application of TMDSEVM6678L.
It is a 2.5mm power jack with positive center tip polarity. Do not use this connector if EVM is
inserted into MicroTCA chassis or AMC carrier backplane.
3.2.6 EMU1, TI 60‐Pin DSP JTAG Connector
EMU1 is a high speed system trace capable TI 60‐pin JTAG connector for XDS560v2 type of
DSP emulation. The on board switch multiplexes this interface with the on‐board XDS100
type emulator. Whenever an external emulator is plugged into EMU1, the external emulator
connection will be switched to the DSP. The I/O voltage level on these pins is 1.8V. So any
1.8 V level compatible emulator can be used to interface with the TMS320C6678 DSP. It
should be noted that when an external emulator is plugged into this connector (EMU1), on
board XDS100 type emulation circuitry will be disconnected from the DSP. The pin out for
the connector is shown in figure below:
Pin #
2
4
6
Figure 3.3: COM_SEL1 Jumper setting
Wire pin3‐5 and pin4‐6
UART over the 3‐pin terminal
5
3
1
PCB edge
33
Signal Name
FT2232H (USB Chip)
Receive
UART Receive
MAX3221 Receive
6
5
4
3
2
1
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