USB5926CSLASHKD datasheet(23/65 Pages) MICROCHIP

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USB5926C

DS00003190B-page 23



2019 - 2021 Microchip Technology Inc.

3.5.3

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, 10 Ω pull-down and 10 Ω pull-

up as shown in Table 3-12.

3.5.4

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, 10 Ω pull-down and 10 Ω pull-up as

shown in Table 3-13.

3.5.5

GENERAL PURPOSE INPUT/OUTPUT CONFIGURATION (

GPIOx)

General Purpose Inputs/Outputs may be used for application specific purposes. Any given GPIO may operate as an

input or an output. Inputs can apply an internal 50k

Ω pull-down or pull-up resistor. Outputs may drive low or drive high

(3.3V). GPIOs may be configured and manipulated during runtime (while enumerated to a host) in one of two ways:

• SMBus configuration

• USB to GPIO bridging

3.5.5.1

SMBus configuration

The SMBus slave interface may be used to write to internal registers that configure the state of the GPIO. Refer to the

“Configuration Options for Microchip USB58xx and USB59xx Hubs” application note for additional details.

3.5.5.2

USB to GPIO Bridging

USB to GPIO Bridging may be used to write to internal registers that configure the state of the GPIO. USB to GPIO

bridging operates via host communication to the hub’s internal Hub Feature Controller. Refer to the “USB to GPIO Bridg-

ing for Microchip USB3.1 Gen 1 Hubs” application note for additional details.

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 3 non-removable

10 kΩ Pull-Down

Port 3, 4 non-removable

10 kΩ Pull-Up

Port 3, 4, 5, non-removable

10 Ω Pull-Down

Port 3, 4, 5, 6 non-removable

10 Ω Pull-Up

Reserved

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

10 Ω Pull-Up

Port 1, 2, 3, 4, 5, 6 battery charging

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