Texas Instruments TMS570LS31 HDK, Руководство пользователя

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TMS570LS31 HDK User Guide
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3 D+
4 NC
5 USBVSS
Before the board is shipped, the FTDI port1 is configured as JTAG, and port2 is
configured as SCI. The CPLD is also programmed to route FTDI JTAG to MCU
JTAG.
There is a circuitry to detect the external JTAG emulator. If a device is plugged
onto the header J4 and J19, the DS1 LED will be turned on, and XDS100V2
JTAG is disabled.
2.2.6 P1, +5V~+12V Input
Connector P1 is the input power connector. This connector brings in +12 volts to
the HDK Board. This is a 2.5 mm jack. The figure below shows this connector as
viewed from the card edge.
Figure 6, +12 Volt Input Jack
text
text
P1
PC Board
GND
+12V
2.2.7 SCI Interface
The internal SCI on the TMS570LS3137 device is connected to the 2
nd
port of the
FTDI chip. The FTDI USB driver makes the FT2232H 2
nd
channel appear as a
virtual COM port (VCP). This allows the user to communicate with the USB
interface via a standard PC serial emulation port.
2.2.8 Daughter Card Interface
The HDK provides expansion connectors that can be used to accept plug-in
daughter cards. The daughter card allows users to build on their EVM platform to
extend its capabilities and provide customer and application specific I/O. The