6

A Product Line of

Diodes Incorporated

PI5USB212

April 2024

© 2024 Copyright Diodes Incorporated. All Rights Reserved.

PI5USB212

Document Number DS44950 Rev 5-2

www.diodes.com

Overview

The PI5USB212 is an USB2.0 High-Speed (HS) Signal conditioner to boost the signals and insert pre-emphasis to compensate the ISI

signal loss in the channels before and after. PI5USB212 will not alter the signals of USB Low Speed (LS), Full Speed (FS), On-The-Go

(OTG) and Battery Charging (BC), while HS signals are compensated. Boost/Pre-emphasis level and Receiver Sensitivity can be pro-

grammed by I2C or pin mode.

BOOST/PRE-EMPHASIS

The BOOST pin of PI5USB212 is used to configure the level of BOOST/PRE-EMPHASIS in pin mode and initialize the corresponding

register in I2C mode. Amplitude boost compensates the amplitude loss due to the long channel before PI5USB212, and pre-emphasis

compensates the high frequency loss due to the low-pass long channel after PI5USB212. The four settings can be selected by an external

pulldown resistor at this pin and it will be sampled a short moment after RSTN rising.

BOOST Pin Connection

Register Default Value

Boost/Pre-Emphasis Level

Setting 0 (<160 Ω)

0000

Lowest

Setting 1 (~1.8 kΩ)

0101

Lower Mid

Setting 2 (~3.6 kΩ)

1010

Higher Mid

Setting 3 (>7.5 kΩ)

1111

Highest

Receiver Sensitivity

The SEN pin of PI5USB212 is used to configure the level of Receiver Sensitivity in pin mode and initialize the corresponding register in

I2C mode. The three settings can be selected by connecting the pin to VCC/Floating/GND during RSTN and it will be sampled a short

moment after RSTN rising. After RSTN, the pin will function as an output for HS detection.

SEN Pin Connection

Register Default Value

Receiver Sensitivity Level

VCC

11

Highest

Floating

10

Higher Mid

GND

01

Lower Mid

Detail Description