EVB-USB5734 datasheet(18/37 Pages) MICROCHIP

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EVB-USB5734 Evaluation Board User’s Guide

DS50002350B-page 18

 2015 Microchip Technology Inc.

FIGURE 2-7:

STRAPPING OPTIONS

2.4.6

Port Power Options: Port Enable and Port Disable Select

Any downstream facing port on the EVB-USB5734 can be disabled if desired. When

both DP & DM signals are pulled high to +3.3V, the USB5734 automatically disables

the port, reports the corrected number of available ports to the host, and drives the

PRT_CTRL line for the disabled port(s) low. By default, all four downstream facing ports

are enabled.

To enable a port, use its Port Enable switch (SW1 - SW4) to select the EN. position.

The associated “Enable” LED will light green.

To disable a port, slide its Port Enable switch (SW1 - SW4) to the Dis. position. The

“Enable” LED will turn off.

The table below describes the port enable/disable strap options available for all four

downstream ports on the USB5734.

TABLE 2-2:

STRAPPING OPTIONS FOR BATTERY CHARGING

SW5 Position

Configuration

No Ports BC Enabled

Port 1 is BC Enabled

Port 1 & 2 are BC Enabled

Port 1, 2 & 3 are BC Enabled

Port 1, 2, 3 & 4 are BC Enabled [default]

Reserved

TABLE 2-3:

STRAPPING OPTIONS FOR PORT REMOVABLE

SW6 Position

Configuration

All ports are Removable [default]

Port 1 is Non-Removable

Port 1 & 2 are Non-Removable

Port 1, 2 & 3 are Non-Removable

Port 1, 2, 3 & 4 are Non-Removable

Reserved

TABLE 2-4:

PORT ENABLE/DISABLE STRAP OPTIONS

Downstream

Port

Associated

Switch

Switch Position

LED

SW1

1-2, 4-5 = Port Enabled (Default)

2-3, 5-6 = Port Disabled

D7 Green

D7 OFF

SW2

1-2, 4-5 = Port Enabled (Default)

2-3, 5-6 = Port Disabled

D8 Green

D8 OFF

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