USB3813 datasheet(14/57 Pages) MICROCHIP

14 / 57 page

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

Datasheet

DS00001715A-page 14

 2014 Microchip Technology Inc.

Suspend

Output

SUSPEND

This signal is used to indicate that the entire hub

has entered the USB suspend state and that

VBUS current consumption should be reduced in

accordance with the USB specification. Refer to

Section 8.7, "Suspend (SUSPEND)," on page 42

for additional information.

Note:

SUSPEND must be enabled via the

Protouch configuration tool.

Interrupt

Request Input

IRQ_N

This active-low signal allows external hardware to

interrupt the device. Refer to Section 8.8,

"Interrupt Requests (IRQ_N)," on page 43 for

additional information.

Interrupt

Output

INT_N

OD8

This active-low signal allows the device to output

an interrupt to external hardware. Refer to

Section 8.9, "Interrupt Output (INT_N)," on

page 43 for additional information.

USB Port

Control

PRTCTLA

OD8/IS

(PU)

This pin functions as both the downstream USB

port power enable output (PRTPWRA) and the

downstream USB port over-current sense input

(OCSA_N).

POWER

Battery

Power Supply

Input

VBAT

Battery power supply input. When VBAT is

connected directly to a +3.3V supply from the

system, the internal +3.3V regulator runs in

dropout and regulator power consumption is

eliminated. A 4.7

μF (<1

Ω ESR) capacitor to

ground is required for regulator stability. The

capacitor should be placed as close as possible

to the device. Refer to Chapter 4, "Power

Connections," on page 17 for power connection

information.

+3.3V Power

Supply

VDD33

+3.3V power supply. A 1.0

μF (<1

Ω ESR)

capacitor to ground is required for regulator

stability. The capacitor should be placed as close

as possible to the device. Refer to Chapter 4,

"Power Connections," on page 17 for power

connection information.

+1.8-3.3V

Core Power

Supply Input

VDDCOREREG

+1.8-3.3V core power supply input to internal

+1.2V regulator. This pin may be connected to

VDD33 for single supply applications when VBAT

equals +3.3V. Running in a dual supply

configuration with VDDCOREREG at a lower

voltage, such as +1.8V, may reduce overall

system power consumption. Refer to Chapter 4,

"Power Connections," on page 17 for power

connection information.

+1.2V Core

Power Supply

VDDCR12

+1.2V core power supply. A 1.0

μF (<1

Ω ESR)

capacitor to ground is required for regulator

stability. The capacitor should be placed as close

as possible to the device. Refer to Chapter 4,

"Power Connections," on page 17 for power

connection information.

Table 3.1 Ball Descriptions (continued)

NUM

BALLS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

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