USB3803 datasheet(38/99 Pages) MICROCHIP

38 / 99 page

USB3803

DS00001691B-page 38

 2014-2015 Microchip Technology Inc.

5.3.41

Default = 0x00h

5.3.42

Default = 0x00h

Bit Number

Bit Name

Description

Reserved

6:4

BOOST_IOUT_2 USB electrical signaling drive strength Boost Bit for Downstream Port ‘2’.

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_1 USB electrical signaling drive strength Boost Bit for Downstream Port ‘1’.

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%

Bit Number

Bit Name

Description

7:0

PRTSP

Port Swap: Swaps the Upstream and Downstream USB DP and DM Pins for

ease of board routing to devices and connectors.

‘0’ = USB D+ functionality is associated with the DP pin and D- functionality is

associated with the DM pin. The setting affects only HUB mode - it has no

impact in BYPASS mode (USB3803C Only).

‘1’ = USB D+ functionality is associated with the DM pin and D- functionality is

associated with the DP pin. The setting affects only HUB mode - it has no impact

in BYPASS mode (USB3803C Only).

Bit 7= Reserved

Bit 6= Reserved

Bit 5= Reserved

Bit 4= Reserved

Bit 3= Port 3 DP/DM Swap.

Bit 2= Port 2 DP/DM Swap.

Bit 1= Port 1 DP/DM Swap.

Bit 0= Upstream Port DP/DM Swap

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