USB5742

DS00002016B-page 16

 2015-2016 Microchip Technology Inc.

3.4.2

PORT DISABLE CONFIGURATION (PRT_DIS_P[2:1] / PRT_DIS_M[2:1])

For PRT_DIS_Px (where x is the corresponding port 2-1):

0

= Port x D+ Enabled

1

= Port x D+ Disabled

For PRT_DIS_Mx (where x is the corresponding port 2-1):

0

= Port x D- Enabled

1

= Port x D- Disabled

3.4.3

NON-REMOVABLE PORT CONFIGURATION (CFG_NON_REM)

The CFG_NON_REM configuration strap is used to configure the non-removable port settings of the device to one of

three settings. These modes are selected by the configuration of an external resistor on the CFG_NON_REM pin. The

resistor options are a 200 kΩ pull-down, 200 kΩ pull-up, and 10 kΩ pull-down, as shown in Table 3-11.

3.4.4

BATTERY CHARGING CONFIGURATION (CFG_BC_EN)

The CFG_BC_EN configuration strap is used to configure the battery charging port settings of the device to one of three

settings. These modes are selected by the configuration of an external resistor on the CFG_BC_EN pin. The resistor

options are a 200 kΩ pull-down, 200 kΩ pull-up, and 10 kΩ pull-down, as shown in Table 3-12.

Note:

Both PRT_DIS_Px and PRT_DIS_Mx (where x is the corresponding port) must be tied to 3.3 V to disable

the associated downstream port. Disabling the USB 2.0 port will also disable the corresponding USB 3.1

Gen 1 port.

TABLE 3-11:

CFG_NON_REM RESISTOR ENCODING

CFG_NON_REM Resistor Value

Setting

200 kΩ Pull-Down

All ports removable

200 kΩ Pull-Up

Port 1 non-removable

10 kΩ Pull-Down

Port 1, 2 non-removable

TABLE 3-12:

CFG_BC_EN RESISTOR ENCODING

CFG_BC_EN Resistor Value

Setting

200 kΩ Pull-Down

No battery charging

200 kΩ Pull-Up

Port 1 battery charging

10 kΩ Pull-Down

Port 1, 2 battery charging