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Tegra 200 Series Developer Board User Guide
DG-04927-001_v01 Advance Information – Subject to Change 24
NVIDIA CONFIDENTIAL
4.4 NAND
The Tegra 250 GMI interface supports a broad range of devices including a variety of NAND devices and configurations.
Works with SLC and MLC devices
Supports up to 8 devices with up to 8 chip selects
Figure 11. Single 8-bit NAND Connection Example
4.5 USB
The Tegra 250 has three available USB controllers. Controllers #1 and #3 come out on the USB PHYs on the USB1 and USB3
pins. Controller #2 can be used for either ULPI or HSIC (only one at a time).
Controller #1
This USB controller is routed to an integrated PHY (USB1) and supports low-, full- and high-speed mode. Both Host and Device
modes are supported. VBUS and Device ID are available to support Type A, B or A/B connector types. USB1 is required for
Recovery mode and must be configurable as a USB Device when the Force Recovery strap (on pin GMI_OE_N is held low. In
this case, USB1 is connected to a host, typically for flashing images at the factory or possibly in the field.
Controller #2
Controller #2 can be used for either ULPI or HSIC. Only one can be used in a design.
ULPI is a 12-pin I/F used to connect to compatible external USB PHYs, baseband or other compatible devices. An example of
the ULPI interface being used to connect to an SMSC USB3315 ULPI to USB PHY is shown in the ULPI section.
HSIC is a 2-pin I/F for high-speed chip-to-chip communications to compatible external PHYs, hubs, basebands, etc.
Controller #3
Controller #3 can be routed to a second integrated USB PHY (USB3) or to the IC_USB interface. Only one of these functions
can be used in a design.
USB3 also supports low, full and high speed modes and can be configured as Host or Device. VBUS and Device ID are
provided on this interface. Typically, in a Smartbook design, USB3 would be used as a Host to interface to a Type A host port,
or more likely, a USB Hub. An example of USB3 interfacing to an SMSC LAN9514 USB Hub and Ethernet controller is provided
in section 3.7 .
The IC_USB interface is used to connect to compatible SIM Cards.