UCS1002-3 datasheet(20/114 Pages) MICROCHIP

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UCS1002-3

DS20006852A-page 20

 2023 Microchip Technology Inc. and its subsidiaries

Legacy

USB devices that require non-BC1.2 signatures must be applied on the DPOUT and DMOUT

pins to enable charging.

OCL

Overcurrent Limit

POR

Power-On Reset

Portable Device

USB device attached to the USB port.

Power Thief

A USB device that does not follow the handshaking conventions of a BC1.2 device or Legacy

devices and draws current immediately upon receiving power (that is, a USB book light, porta-

ble fan, and so on).

Removal Detection

A Removal Detection event occurs when the current load on the VBUS pin drops to less than

IREM_QUAL for longer than tREM_QUAL.

Removal

The physical removal of a portable device from a USB port controlled by the UCS1002-3.

Response

An action, usually in response to a stimulus, in charger emulation performed by the UCS1002-

3 device via the USB data lines.

SDP or USB-IF SDP Standard Downstream Port. The combination of the UCS1002-3 high-speed switch being

closed with an upstream USB host present comprises a BC1.2 SDP. This enables a BC1.2

compliant portable device to simultaneously draw current up to 0.5A while data communica-

tion is active.

Signature

Application of a charger emulation profile without waiting for a response. One-way

communication from the UCS1002-3 to the portable device.

Stand-Alone Mode

Indicates that the communications protocol is not active and all communications between the

UCS1002-3 and a controller are done via the external pins only (M1, M2, EM_EN, PWR_EN,

S0 and LATCH as inputs; ALERT# and A_DET# as outputs).

Stimulus

An event in charger emulation detected by the UCS1002-3 device via the USB data lines.

TABLE 4-1:

TERMS AND ABBREVIATIONS (CONTINUED)

Term/Abbreviation

Description

UCS1002-3 Datasheet(PDF) 20 Page - Microchip Technology