USB3320 datasheet(23/70 Pages) MICROCHIP

Part #	USB3320

Description	Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver

PDF	70 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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23 / 70 page

 2014-2015 Microchip Technology Inc.

DS00001792B-page 23

USB3320

The USB3320 can be powered from an external 3.3V supply as shown below in Figure 5-7. When using the external

supply, both the VBAT and VDD33 pins are connected together. The bypass capacitor, CBYP, is recommended when

using the external supply.

For peripheral only or host only operation, the VBAT supply shown below in Figure 5-8 may be connected to the VBUS

pin of the USB connector for bus powered applications. In this configuration, external overvoltage protection is required

to protect the VBAT supply from any transient voltage present at the VBUS pin of the USB connector.

FIGURE 5-6:

POWERING THE USB3320 FROM A BATTERY

FIGURE 5-7:

POWERING THE USB3320 FROM A 3.3V SUPPLY

VBUS

VDD33

VBAT

GND

LDO

PHY

To OTG

COUT

VBUS

To USB Con.

RVBUS

VBUS

VDD33

VBAT

GND

LDO

PHY

To OTG

CBYP

Vdd

3.3V

VBUS

To USB Con.

RVBUS

USB3320 Datasheet(PDF) 23 Page - Microchip Technology