Texas Instruments TMS570LS12x, Руководство пользователя

Страница: 12 / 27

+12V
GND
PC Board
P1
Connectors
www.ti.com
Table 2-4. J19, MIPI Connector Signal
Mapping (continued)
MCU Pin Pin MCU
Signals Number Number Signals
NC 49 50 NC
NC 51 52 NC
NC 53 54 NC
NC 55 56 NC
GND 57 58 GND
NC 59 60 NC
2.2.5 J7, XDS100V2 USB JTAG Interface
The USB connector J7 is used to connect to the host development system that is running the software
development IDE, Code Composer Studio. The signals on this connector are shown in
Table 2-5 .
Table 2-5. J7, XDS100V2 USB JTAG Interface
Pin Number Signal Name
1 USBVDD
2 D-
3 D+
4 NC
5 USBVSS
Before the board is shipped, the XDS100V2 port1 is configured as JTAG, and port2 is configured as SCI.
The CPLD on the board is also programmed to route the JTAG signals to the MCU.
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, +5 V to +12 V Input
Connector P1 is the input power connector. This connector brings in +5 V to +12 V to the HDK board. This
is a 2.5 mm jack.
Figure 2-5 shows this connector as viewed from the card edge.
Figure 2-5. +12 V Input Jack
2.2.7 SCI Interface
The internal SCI on the TMS570LS1227 device is connected to the second port of the XDS100V2. The
XDS100V2 USB driver makes the FT2232H second 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.
12 Physical Description SPNU568 – September 2012
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated