UCS1003-3 datasheet(41/138 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS20005346B-page 41

UCS1003-1/2/3

6.0

USB HIGH-SPEED DATA

SWITCH

The UCS1003-1/2/3 family contains a series USB 2.0

compliant, high-speed switch between the DPIN and

DMIN pins, and between the DPOUT and DMOUT pins.

This switch is designed for high-speed, low-latency

functionality to allow USB 2.0 full-speed and high-speed

communications with minimal interference.

Nominally, the switch is closed in the Active state,

allowing uninterrupted USB communications between

the upstream host and the portable device. The switch

is opened when:

• The UCS1003-1/2/3 family is actively emulating,

using any of the charger emulation profiles

except CDP (by default – see Section 10.4.5

“High-Speed Switch Configuration Register”

)

• The UCS1003-1/2/3 family is operating as a

dedicated charger unless the HSW_DCE

Configuration bit is set (see Section 10.4.5

“High-Speed Switch Configuration Register”

)

• The UCS1003-1/2/3 family is in the Detect state

(by default) or in the Sleep state

6.1

USB-IF High-Speed Compliance

The USB data switch will not significantly degrade the

signal integrity through the device DP/DM pins with

USB high-speed communications.

Note:

If the VDD voltage is less than VDD_TH, the

high-speed data switch will be disabled

and opened.

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