STUSB1602 datasheet(22/55 Pages) STMICROELECTRONICS

22 / 55 page

Features description

STUSB1602

22/55

DocID028319 Rev 2

•

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

CC2 pins are pulled down to ground by an 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.

Table 9. Orientation and current capability detection in sink power role

CC1 pin

(CC2 pin)

CC2 pin

(CC1 pin)

Charging

current

configuration

A_B_SIDE pin

CC1/CC2

(CC2/CC1)

Current capability state

SINK_POWER_STATE

bit values

Rp 3A

Rp 1.5A

Default

HiZ (0)

PowerDefault.SNK (source

supplies default USB

current)

Rp 1.5A

Rp default

1.5 A

HiZ (0)

Power1.5.SNK (source

supplies 1.5 A USB Type-C

current)

Rp 3A

Rp default

3.0 A

HiZ (0)

Power3.0.SNK (source

supplies 3.0 A USB Type-C

current)

def/1.5A/3A

Default

HiZ (HiZ)

PowerDefault.SNK (source

supplies default USB

current)

Table 10. Orientation detection in source power role

CC1 pin

(CC2 pin)

CC2 pin

(CC1 pin)

Detection

process

A_B_SIDE pin

CC1/CC2

(CC2/CC1)

Orientation detection state

TYPEC_FSM_STATE bits value

1Rd

1st step: debug

accessory mode

detected

HiZ (HiZ)

UnorientedDebugAccessory.SRC

2Rd

≤ Ra

2nd step:

orientation

detected (DTS

presents a

resistance to GND

with a value ≤ Ra

on its CC2 pin)

HiZ (0)

OrientedDebugAccessory.SRC

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