................. TUSB9260 DEMO Board Block Diagram ......................Component Location ........................12-V DC Jack ....................Cable Power vs. Self Power ........................Power Switch ..................3.3-V, 1.8-V, and 1.1-V Regulator ......................Push Button Reset ..............................................Crystal or Oscillator Support ....................... GPIOs/LEDs/PBUTTON ........................
TUSB9260 DEMO Board Block Diagram Figure 1 represents the block diagram of the TUSB9260 DEMO Board. The board is designed to be powered from either a 12-V DC wall-wart (not supplied) or via USB cable power. Figure 1. Figure 1. DEMO Board Block Diagram SLLU131B –...
The DEMO Baord uses a TI TPS2561 power switch. This switch serves two purposes. It limits the amount of in-rush current on VBUS and it allows power to the SATA connector to be switched via the TUSB9260. The switch is controlled via GPIO10 from the TUSB9260 and power faults can be monitored by GPIO11.
The DEMO Board utilizes a TI TPS650061 regulator to power the TUSB9260 and associated circuitry. Push Button Reset Connected to the TPS650061 is a push button (SW2) that can be used to reset the TUSB9260 to its default state. When pressed the global reset terminal (GRST#) on the TUSB9260 will be driven low.
SLLU131B – July 2010 – Revised February 2011 The TUSB9260 supports a SPI interface connected to a SPI flash device. The flash device is used to hold the firmware for the TUSB9260. For normal SPI operation a jumper on J13 must be populated. For reprogramming of the SPI flash device it may be necessary to temporally remove J13.
Crystal or Oscillator Support The TUSB9260 DEMO can support either a crystal or oscillator reference clock. By default the board is configured to use a 25-MHz crystal. To use an oscillator R23 and R37 need to be populated with a 0-ohm resistor.
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