Datasheet

TUSB9261
SLLSE67F –MARCH 2011–REVISED JULY 2013 www.ti.com
4.2 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)
• USB Mass Storage Class (MSC) Bulk-Only Transport (BOT)
– 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
4.3 GPIO/PWM LED Designations
The default firmware provided by TI drives the GPIO and PWM outputs as listed in the table below.
Table 4-1. GPIO/PWM LED Designations
GPIO0 SW heartbeat
00: U3 state or default
01: U2 state
GPIO1/GPIO5 USB3 power state (U0-U3)
10: U1 state
11: U0 state
GPIO2 HS/FS suspend
GPIO3 Push button input on customer board
GPIO4 Not used
GPIO6 FS/HS connected
GPIO7 SS connected
PWM0 Disk activity
PWM1 U3 or HS/FS suspend state (fades high and low)
GPIO10
Not used
(SPICS1)
GPIO11
Not used
(SPICS2)
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