Specifications

BrightSign HD2000

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

On Board Switch

The on board switch is connected to a GPIO32. There is a pullup on the button so that GPIO32 is high

normally, and it is pulled low when the button is pressed.

IR Receiver

The IR receiver receives a 38KHz IR signal. The IR signal is filtered and demodulated and then sent into

the PNX8950 on GPIO40. The signal is called IR_DAT on the schematic.

CF flash slot

The CF flash slot is connected up to the SMSC USB2777 USB flash controller chip. The USB2777 is

connected to the ISP1563BM PCI to USB bridge chip. The USB2777 won’t attempt to access the CF slot

unless it first detects that a CF card is present. The signal CF_CD1 and CF_CD2 go low when a CF card

is inserted. Power to the CF slot is controlled by a MOSFET, and it is not turned on until the USB2777

detects that a CF card has been inserted into the CF slot.

SD/MMC Flash Slot

The SD/MMC flash slot supports 2 different formats of flash cards: SD & MMC. Power to the SD/MMC

slot is controlled by a the USB2777 directly with a built in MOSFET, and it is not turned on until the

USB2777 detects that one of the SD/MMC cards has been inserted into the slot.

NAND flash

The HD2000 has a build 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 Realtec 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

USB is implemented by a PCI ISP1563 USB dual host controller chip. There is also a dual over-current

protected switch TPS2042BD device, which is used to turn on and off power to the USB device, and to

detect over-current situations.