STUSB4700 datasheet(13/32 Pages) STMICROELECTRONICS

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STUSB4700

Block descriptions

DocID030193 Rev 2

13/32



If an overtempe

rature is detected, the “THERMAL_FAULT”flag is asserted.



If an internal pull-

up voltage on CC pins is below UVLO threshold, the “VPU_VALID”

flag is asserted.



If an overvoltage is detected on the CC pins, the “VPU_OVP_FAULT” flag is asserted.



If the VBUS voltage is out of the valid voltage range during attachment, the

“VBUS_VALID” flag is asserted.



If an undervoltage is detected on the VDD pin during attachment when UVLO detection

is enabled, the “VDD_UVLO_DISABLE” flag is asserted.



If an overvoltage is detected on the VDD pin during attachment when OVLO detection

is enabled, the “VDD_OVLO_DISABLE” flag is asserted.

The I2C register bits mentioned above in quotes give either the state of the hardware fault

when it occurs or the setting condition to detect the hardware fault.

3.9

Accessory mode detection

The STUSB4700 supports the detection of audio accessory mode and debug accessory

mode as defined in the USB Type-C standard specification source power role with

accessory support.

3.9.1

Audio accessory mode detection

The STUSB4700 detects an audio accessory device when both the CC1 and CC2 pins are

pulled down to ground by a Ra resistor from the connected device. The audio accessory

detection is advertised through the CC_ATTACHED_MODE bits of the I2C register

CC_CONNECTION_STATUS.

3.9.2

Debug accessory mode detection

The STUSB4700 detects a connection to a debug and test system (DTS) when it operates

either in sink power role or source power role. The debug accessory detection is advertised

by the DEBUG1 and DEBUG2 pins as well as through the CC_ATTACHED_MODE bits of

the I2C register CC_CONNECTION_STATUS.

In source power role, a debug accessory device is detected when both the CC1 and CC2

pins are pulled down to ground by a Rd resistor from the connected device. The orientation

detection is performed in two steps as described in the table below. The DEBUG2 pin is

asserted to advertise the DTS detection and the A_B_SIDE pin indicates the orientation of

the connection. The orientation detection is advertised through the TYPEC_FSM_STATE

bits of the I2C register CC_OPERATION_STATUS.

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