USB3813 datasheet(11/57 Pages) MICROCHIP

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USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications

Datasheet

 2014 Microchip Technology Inc.

DS00001715A-page 11

3.1

Ball Descriptions

This section provides a detailed description of each ball. The signals are arranged in functional groups

according to their associated interface.

The “_N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal

is at a low voltage level. For example, RESET_N indicates that the reset signal is active low. When

“_N” is not present after the signal name, the signal is asserted when at the high voltage level.

The terms assertion and negation are used exclusively. This is done to avoid confusion when working

with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a

signal is active, independent of whether that level is represented by a high or low voltage. The term

negate, or negation, indicates that a signal is inactive.

Note: The buffer type for each signal is indicated in the BUFFER TYPE column of Table 3.1. A

description of the buffer types is provided in Section 3.3.

Table 3.1 Ball Descriptions

NUM

BALLS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

USB/HSIC INTERFACES

Upstream

USB D+

(Flex Port 0)

DP0

AIO

Upstream USB Port 0 D+ data signal.

Note:

The upstream Port 0 signals can be

optionally swapped with the

downstream Port 1 signals.

Upstream

USB D-

(Flex Port 0)

DM0

AIO

Upstream USB Port 0 D- data signal.

Note:

The upstream Port 0 signals can be

optionally swapped with the

downstream Port 1 signals.

Downstream

HSIC Data

(Swap Port 1)

DATA1

HSIC

Downstream HSIC Port 1 DATA signal.

Note:

The downstream Port 1 signals can be

optionally swapped with the upstream

Port 0 signals.

Downstream

HSIC Strobe

(Swap Port 1)

STRB1

HSIC

Downstream HSIC Port 1 STROBE signal.

Note:

The downstream Port 1 signals can be

optionally swapped with the upstream

Port 0 signals.

Downstream

USB D+

(Port 2)

DP2

AIO

Downstream USB Port 2 D+ data signal.

Downstream

USB D-

(Port 2)

DM2

AIO

Downstream USB Port 2 D- data signal.

Downstream

USB D+

(Port 3)

DP3

AIO

Downstream USB Port 3 D+ data signal.

Downstream

USB D-

(Port 3)

DM3

AIO

Downstream USB Port 3 D- data signal.

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