USB5744 datasheet(17/51 Pages) MICROCHIP

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DS00001855L-page 17

USB5744

3.4.2

PORT DISABLE CONFIGURATION (PRT_DIS_P[4:1] / PRT_DIS_M[4:1])

The PRT_DIS_P[

4:1] and PRT_DIS_M[4:1] configuration straps are used in conjunction to disable the related port (4-1).

For PRT_DIS_Px (where x is the corresponding port 4-1):

0 = Port x D+ Enabled

1 = Port x D+ Disabled

For PRT_DIS_Mx (where x is the corresponding port 4-1):

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

five 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, 10 kΩ pull-down, 10 kΩ pull-up, and 10 Ω pull-down, as shown

in Table 3-12.

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 five

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, 10 kΩ pull-down, 10 kΩ pull-up, and 10 Ω pull-down, as shown in

Table 3-13.

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 3.2

Gen 1 port.

TABLE 3-12:

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

10 kΩ Pull-Up

Port 1, 2, 3, non-removable

10 Ω Pull-Down

Port 1, 2, 3, 4 non-removable

TABLE 3-13:

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

10 kΩ Pull-Up

Port 1, 2, 3, battery charging

10 Ω Pull-Down

Port 1, 2, 3, 4 battery charging

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