USB3803 datasheet(37/99 Pages) MICROCHIP

37 / 99 page

 2014-2015 Microchip Technology Inc.

DS00001691B-page 37

USB3803

5.3.39

Default = 0x00h

5.3.40

Default = 0x30h

Bit Number

Bit Name

Description

Reserved

6:4

DN2_SQUELC

These two bits control the Squelch setting of the downstream port 2.

‘000’ = Nominal value

‘001’ = 90% of Nominal value

‘010’ = 80% of Nominal value

‘011’ = 70% of Nominal value

‘100’ = 60% of Nominal value

‘101’ = 50% of Nominal value

‘110’ = 120% of Nominal value

‘111’ = 110% of Nominal value

Reserved

2:0

DN1_SQUELC

These three bits control the Squelch setting of the downstream port 1.

‘000’ = Nominal value

‘001’ = 90% of Nominal value

‘010’ = 80% of Nominal value

‘011’ = 70% of Nominal value

‘100’ = 60% of Nominal value

‘101’ = 50% of Nominal value

‘110’ = 120% of Nominal value

‘111’ = 110% of Nominal value

Bit Number

Bit Name

Description

Reserved

6:4

BOOST_IOUT_

USB electrical signaling drive strength Boost Bit for Upstream Port ‘A’.

Boosts USB High Speed Current.

3’b000: Nominal

3’b001: -5%

3’b010: +10%

3’b011: +5%

3’b100: +20%

3’b101: +15%

3’b110: +30%

3’b111: +25%

Reserved

2:0

BOOST_IOUT_

USB electrical signaling drive strength Boost Bit for Downstream Port ‘3’.

Boosts USB High Speed Current.

3’b000: Nominal

3’b001: -5%

3’b010: +10%

3’b011: +5%

3’b100: +20%

3’b101: +15%

3’b110: +30%

3’b111: +25%

USB3803 Datasheet(PDF) 37 Page - Microchip Technology

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