2.2.5

DISCH

side.

When used as input, the discharge is internal and a serial resistor must connected to the pin to limit the discharge

current through the pin. Maximum discharge current is 500 mA.

discharge current is required by the application, for instance.

The pin is activated at the same time as the internal discharge path on VBUS_VS_DISCH pin. The discharge is

activated automatically during cable disconnection and error recovery state. The discharge time is programmable

by NVM (see Section 5 Start-up configuration).

2.2.6

GND

Ground.

2.2.7

ATTACH

This pin is asserted when a valid source-to-sink connection is established. It is also asserted when a connection

to a debug accessory device is detected.

2.2.8

RP_3A/RP_1A5

These pins report by default the status of the USB source current capabilities.

Pin name

Value

Description

VBUS_EN_SNK

Hi-Z

No source attached

0

Source attached

RP_3A

Hi-Z

No source attached or source supplies default USB Type-C current at 5 V

0

Source supplies 3.0 A USB Type-C current at 5 V

RP_1A5

Hi-Z

No source attached or source supplies default USB Type-C current at 5 V.

0

Source supplies 1.5 A USB Type-C current at 5 V.

Note:

RP_3A and RP_1A5 signals are valid when a SOURCE is attached.

STUSB4500L

Pin description

DS13102 - Rev 1

page 6/31