Texas Instruments BoosterPack C5545, Руководство пользователя по оборудованию, Страница: 20 / 43

Introduction to C5545 BoosterPack Board
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20 SPRUI90 – September 2016
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TMS320C5545 BoosterPack Hardware
2.10 USB Interface
The C5545 DSP supports a device-mode USB controller that provides a low-cost connectivity solution for
consumer portable devices by providing a mechanism for data transfer to a USB host up to 480 Mbps.
The USB controller complies with the USB 2.0 standard high-speed and full-speed specifications.
The C5545 DSP USB signals are terminated at micro USB type-B connector (J1) as shown in Figure 13 .
ESD diodes are provided for the USB signals. The USB ID pin on the connector is left floating as this is
device-only port.
Figure 13. USB Interface
2.11 UART Interface
The UART interfaces available on the C5545 DSP and CC2650 MCU can be connected either to the
LaunchPad or to the XDS100 (for UART over USB virtual com port) using the appropriate jumper
selections. For more information, see the UART Jumper selection in
Figure 14 .
Level translators (U12 and U18, SN74AVC4T/8T) are used between the C5545 and LaunchPad and
XDS100 signals because the IO voltages of the LaunchPad and XDS100 are 3.3 V while the C5545 DSP
IO voltage is 1.8 V.
Figure 14. UART Interface Figure 15. UART Interface - Schematics