USB84604 Datasheet, PDF (30/61 Pages) Microchip Technology – USB 2.0 HSIC Hi-Speed 4-Port Controller Hub

USB84604
6.3.2 SPI SPEED SELECT (SPI_SPD_SEL)
This strap is used to select the speed of the SPI as follows:
TABLE 6-2: SPI_SPD_SEL CONFIGURATION DEFINITIONS
SPI_SPD_SEL
‘0’
‘1’
Definition
30 MHz SPI operation (default)
60 MHz SPI operation
Note: If the latched value on reset is 1, this pin is tri-stated when the chip is in the suspend state. If the latched
value on reset is 0, this pin is driven low during a suspend state.
6.4 SPI External Flash
All SPI EEPROM programming is performed via the upstream USB connection of the hub. The hub must be powered
on and enumerated (connected) to the USB host PC.
Two types of files may be programmed to the SPI EEPROM:
• Complete firmware file obtained from Microchip.
• User generated configuration file created with ProTouch2.
The external flash can be programmed using the Microchip ProTouch2 MPT software tool which can be downloaded
from the Microchip website at http://www.microchip.com/ProTouch.
Note: Refer to the Protouch MPT user manual on using this software to program the configuration. It can be
downloaded from the same website.
6.4.1
COMPATIBLE DEVICES
The SPI EEPROM must conform to the following requirements in order to be compatible with Microchip hubs:
• 60 MHz clock rate
• Dual data read capable
• 2 MB or larger capacity (recommended)
6.4.2 OBTAINING FIRMWARE IMAGES
Firmware images alter the base functionality of the UCH Hub. Firmware images must be provided by Microchip, they
are not user-generated. To obtain the latest firmware releases, consult the product pages (Documentation and Software
section) of the devices above.
6.4.3 OBTAINING CONFIGURATION FILES
Configuration files are user-generated files that change basic operational parameters of the hub such as changing ven-
dor Ids, disabling downstream ports, or adjusting the PHYBoost or VariSense settings. Configuration files can be gen-
erated using the original ProTouch graphical user interface.
DS60001295C-page 30
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