USB334X datasheet(8/92 Pages) MICROCHIP

8 / 92 page

USB334x

DS00002646A-page 8

 2009-2018 Microchip Technology Inc.

5DATA[2]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

6DATA[3]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

7DATA[4]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

8DATA[5]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

9DATA[6]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

DATA[7]

I/O,

CMOS

N/A

ULPI bi-directional data bus. DATA[7] is the MSB.

SPK_L

I/O,

Analog

N/A

USB switch in/out for DM signals.

SPK_R

I/O,

Analog

N/A

USB switch in/out for DP signals.

I/O,

Analog

N/A

D+ pin of the USB cable.

I/O,

Analog

N/A

D- pin of the USB cable.

VDD33

Power

N/A

3.3V Regulator Output. A 1.0uF (<1 ohm ESR)

bypass capacitor to ground is required for regulator

stability. The bypass capacitor should be placed as

close as possible to the USB334x.

VBAT

Power

N/A

Regulator input. The regulator supply can be from

5.5V to 3.0V.

VBUS

I/O,

Analog

N/A

This pin is used for the VBUS comparator inputs and

for VBUS pulsing during session request protocol.

An external resistor, RVBUS, is required between this

pin and the USB connector.

Input,

Analog

N/A

For device applications the ID pin is connected to

VDD33. For Host applications ID is grounded. For

OTG applications the ID pin is connected to the USB

connector.

RBIAS

Analog,

CMOS

N/A

Bias Resistor pin. This pin requires an 8.06kΩ (±1%)

resistor to ground, placed as close as possible to the

USB334x. Nominal voltage during ULPI operation is

0.8V.

REFCLK

Input,

CMOS

N/A

ULPI Clock Output Mode:

Model-specific reference clock pin.

See Product Identification System, Note 1.

Clock Input Mode:

60MHz ULPI Clock Input.

TABLE 2-1:

USB3341, USB3346, AND USB3347 PIN DESCRIPTIONS (CONTINUED)

Name

Direction/

Type

Active

Level

Description

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