USB5532B datasheet(12/40 Pages) MICROCHIP

12 / 40 page

2-Port SS/HS USB Hub Controller

Datasheet

Revision 1.2 (05-31-13)

SMSC USB5532B

DATASHEET

USB PORT CONTROL

PRT_PWR[2:1]/

PRT_CTL[2:1]

O12

USB Power Enable

Enables power to USB peripheral devices downstream.

Note:

This pin also provides configuration strap functions.

See Note 3.1.

VBUS

Upstream VBUS Power Detect

This pin can be used to detect the state of the upstream bus power.

SPI INTERFACE (4 PINS)

SPI_CE_N

O12

SPI Enable

SPI_CLK

O12

SPI Clock

SPI_DO

O12

SPI Serial Data Out

The output for the SPI port.

Note:

This pin also provides configuration strap functions.

See Note 3.2.

SPI_DI

SPI Serial Data In

The SPI data in to the controller from the ROM. This pin has a weak

internal pull-down applied at all times to prevent floating.

JTAG/OCS INTERFACE

TRST

JTAG Asynchronous Reset

Note:

If using the SMBus interface, a pull-up on this signal will

enable Legacy Mode, while leaving it unconnected or pulled-

down will enable Advanced Mode.

Note:

Only available in test mode.

TCK

JTAG Clock

This input is used for JTAG boundary scan and has a weak pull-down.

It can be left floating or grounded when not used. If the JTAG is

connected, then this signal will be detected high, and the software

disables the pull up after reset.

Note:

Only available in test mode.

OCS1

Over-Current Sense 1

Input from external current monitor indicating an over-current condition.

Note:

This pin also provides configuration strap functions.

See Note 3.3.

Table 3.1 USB5532B Pin Descriptions (continued)

SYMBOL

BUFFER

TYPE

DESCRIPTION

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