STUSB1602 Datasheet, PDF (21/55 Pages) STMicroelectronics – Power hubs and docking stations

STUSB1602
Features description
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
3.9.1
3.9.2
Accessory mode detection
The STUSB1602 supports the detection of audio accessory mode and debug accessory
mode as defined in the USB Type-C standard specification with the following Type-C power
modes (see Section 6: Start-up configuration):
• Source power role with accessory support
• Sink power role with accessory support
• Dual power role with accessory support
• Dual power role with accessory and Try.SRC support
• Dual power role with accessory and Try.SNK support.
Audio accessory mode detection
The STUSB1602 detects an audio accessory device when both the CC1 and CC2 pins are
pulled down to ground by an 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.
Debug accessory mode detection
The STUSB1602 detects a connection to a debug and test system (DTS) when it operates
either in sink power role or in 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 sink power role, a debug accessory device is detected when both the CC1 and CC2
pins are pulled up by an Rp resistor from the connected device. The voltage levels on
the CC1 and CC2 pins give the orientation and current capability as described in the
table below. The DEBUG1 pin is asserted to advertise the DTS detection and the
A_B_SIDE pin indicates the orientation of the connection. The current capability of the
DTS is given through the SINK_POWER_STATE bits of the I²C register
CC_OPERATION_STATUS.
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