TUSB9261-Q1

SLLSEE2A – JANUARY 2014 – REVISED JANUARY 2014

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Firmware Support

Default firmware support is provided for the following:

•

SuperSpeed USB and USB 2.0 High-Speed and Full-Speed

•

USB Attached SCSI Protocol (UASP) for Hard Disk Drives (HDD) and Solid State Drives (SSD)

•

USB Mass Storage Class (MSC) Bulk-Only Transport (BOT) for HDD, SSD, and Optical Drives

–

Including the 13 Error Cases

•

USB Mass Storage Specification for Bootability

•

USB Device Class Definition for Human Interface Devices (HID)

–

Firmware Update and Custom Functionality (e.g. One-Touch Backup)

•

Serial ATA Advanced Host Controller Interface (AHCI)

•

General Purpose Input/Output (GPIO)

–

LED Control and Custom Functions (e.g. One-Touch Backup Control)

•

Pulse Width Modulation (PWM)

–

LED Dimming Control

•

Serial Peripheral Interface (SPI)

–

Firmware storage and storing Custom Device Descriptors

•

Serial Communications Interface (SCI)

–

Debug Output Only

GPIO/PWM LED Designations

The default firmware provided by TI drives the GPIO and PWM outputs as listed in the table below.

Table 8. GPIO/PWM LED Designations

GPIO0

Undefined. Defaults to input with integrated pull-down. Controllable as output via HID.

00: U3 state or default

Output indicating USB3 power state (U0-U3), if U1/U2

01: U2 state

is enabled. Otherwise, defaults to an input with pull-

GPIO1/GPIO5

down and may be driven low or high as an output via

10: U1 state

HID.

11: U0 state

GPIO2

Output indicating HS/FS suspend when connected as USB 2.0. High indicates the USB 2.0 HS/FS bus is suspended.

GPIO3

Input with integrated pull-down for momentary push button input to signal remote wake.

GPIO4

Input to identify bus or self-powered status. Input should be high to indicate self-powered.

GPIO6

Undefined. Defaults to input with pull-down. Controllable as output via HID.

GPIO7

Output indicating SuperSpeed USB connection status. High indicates a SuperSpeed USB connection.

GPIO8

UART Rx

GPIO9

UART Tx

GPIO10

Undefined. Defaults to input with integrated pull-up. Controllable as output via HID.

GPIO11

Input with integrated pull-up to indicate a power fault condition. Low indicates a power fault.

PWM0

Output indicating disk activity.

PWM1

Output indicating software heartbeat.

The LED’s on the TUSB9261 Product Development Kit (PDK) board are connected as in the table above. Please

see the TUSB9261 PDK Guide for more information on GPIO LED connection and usage. This EVM is available

for purchase, contact TI for ordering information.

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Product Folder Links :TUSB9261-Q1