USB5532B datasheet(14/40 Pages) MICROCHIP

14 / 40 page

2-Port SS/HS USB Hub Controller

Datasheet

Revision 1.2 (05-31-13)

SMSC USB5532B

DATASHEET

Note 3.1

The PRT_PWR[2:1] pins can optionally provide additional configuration strap functions to

enable/disable the associated port and configure its battery charging capabilities.

Configuration strap values are latched on device reset. Table 3.2 details the functions

associated with the various strap settings.

Strapping features are enabled by default and can be optionally disabled via the SMSC

Pro-Touch software programming tool. For additional information on the Pro-Touch

programming tool, contact your local SMSC sales representative.

Strapping functions are not supported for designs that support OCS but not power

switching.

Note 3.2

The SPI_DO pin provides an additional SPI_SPD_SEL configuration strap function.

SPI_SPD_SEL selects between the 30MHz SPI Mode when pulled-down to ground

(default) and the 60MHz SPI Mode when pulled-up to VDD33. The SPI_SPD_SEL strap

value is latched on Power-On Reset (POR) or RESET_N deassertion.

Note 3.3

The OCS[2:1] pins can optionally provide additional configuration strap functions. To set

the associated port into the non-removable state, the OCS pin must be configured with a

pull-down (<10 k

Ω to VSS). Otherwise, the port will be configured in the removable state.

Configuration strap values are latched on device reset.

Strapping features are enabled by default and can be optionally disabled via the SMSC

Pro-Touch software programming tool. For additional information on the Pro-Touch

programming tool, contact your local SMSC sales representative.

Strapping functions are not supported for designs that support OCS but not power

switching.

(14) NC

No connect pins

DIGITAL AND POWER

(4) VDD33

3.3 V Power

(8) VDD12

1.25 V Power

VSS

Ground Pad

This exposed pad is the device’s only connection to VSS and the

primary thermal conduction path. Connect to an appropriate via field.

Table 3.2 PRT_PWR[2:1] Configuration Strap States

PRT_PWR[2:1]

STRAP SETTING

PORT STATE

BATTERY CHARGING

No Pull-Up or Pull-Down

Enabled

Disabled

Pull-Down:

<10 k

Ω to VSS

Disabled

N/A

Pull-Up:

<10 k

Ω and >1 kΩ to VDD33

Enabled

Table 3.1 USB5532B Pin Descriptions (continued)

SYMBOL

BUFFER

TYPE

DESCRIPTION

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