Universal Serial Bus (USB)
TMS320F2837xD Microcontroller Workshop - Communications 12 - 21
F28x USB Hardware
USB Hardware
The USB controller requires a total of three signals (D+, D-, and
VBus) to operate in device mode and two signals (D+, D-) to operate
in embedded host mode
VBus implemented in software using external interrupt or polling
GPIOs are NOT 5V tolerant
To make them tolerant use 100kΩ and internal device ESD diode clamps
Note: (1) VBus sensing is only required in self-powered applications
(2) Device pins D+ and D- have special buffers to support the high speed requirements
of USB; therefore their position on the device is not user-selectable
USB Controller Summary
USB Controller Summary
Complies with USB 2.0 specifications
Full-speed (12 Mbps) Device controller
Full- /Low-speed (12 Mbps/1.5 Mbps) Host
controller
The DMA controller may be used to read and
write the USB FIFOs via software triggering
Full software library with application examples
is provided within C2000Ware™
To Next Page
Need help?
General
