USB3300 datasheet(10/53 Pages) MICROCHIP

Part #	USB3300

Description	Hi-Speed USB Host, Device or OTG PHY

PDF	53 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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10 / 53 page

USB3300

DS00001783B-page 10

 2014-2015 Microchip Technology Inc.

REG_EN

I/O,

CMOS,

Pull-low

N/A

On-Chip 1.8V regulator enable. Connect to ground to

disable both of the on chip (VDDA1.8 and VDD1.8)

regulators. When regulators are disabled:

• External 1.8V must be supplied to VDDA1.8 and

VDD1.8 pins. When the regulators are disabled,

VDDA1.8 may be connected to VDD1.8 and a

bypass capacitor (0.1uF recommended) should be

connected to each pin.

• The voltage at VDD3.3 must be at least 2.64V (0.8

* 3.3V) before voltage is applied to VDDA1.8 and

VDD1.8.

RBIAS

Analog,

CMOS

N/A

External 12KΩ +/- 1% bias resistor to ground.

GND FLAG

Ground

N/A

Ground. The flag must be connected to the ground

plane with a via array under the exposed flag. This is

the main ground for the IC.

TABLE 3-1:

USB3300 PIN DEFINITIONS 32-PIN QFN PACKAGE (CONTINUED)

Name

Direction,

Type

Active

Level

Description

USB3300 Datasheet(PDF) 10 Page - Microchip Technology