Nand Flash; Ethernet; Usb - Roku Compact Hardware Manual

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NAND flash

The HD2000 has a built in NAND flash. All the code for the unit is stored on the NAND flash, and it may
also be possible to store some content on the NAND flash. The NAND flash is connected to the PCI/XIO
bus on the PNX8950.

Ethernet

10/100 Base T Ethernet is implemented on the HD2000 by a Realtek RTL8100C PHY controller. This
device takes the PNX8950 Ethernet signals and converts them to the differential Ethernet signals. The
PHY chip is also connected to an on-board Ethernet magnetic and a RJ45 for cable termination. The
DM9161 chip is able to signal to the PNX8950 that its state has changed by toggling the INT_ETH line,
which is connected to GPIO11.

USB

The USB 2.0 High speed host controller is implemented internally inside the PNX8935 SOC chip. There
is also a dual over-current protected switch TPS2069 device, which is used to turn on and off power to the
USB device, and to detect over-current situations.
This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Roku assumes no
obligation regarding future manufacturing unless otherwise agreed to in writing. www.rokulabs.com © Roku 2008