2.3

Pin description

2.3.1

CC1 / CC2

CC1 and CC2 are the configuration channel pins used for connection and attachment detection, plug orientation

determination and system configuration management across USB Type-C cable.

2.3.2

CC1DB/CC2DB

CC1DB and CC2DB are used for dead battery mode when the STUSB1602 is configured in sink power role or

dual power role. This mode is enabled by connecting CC1DB and CC2DB respectively to CC1 and CC2. Thanks

to this connection, the pull down terminations on the CC pins are present by default even if the device is not

supplied (see Section 3.6 Dead battery).

Note:

CC1DB and CC2DB must be connected to ground when the STUSB1602 is configured in source power role or

when dead battery mode is not supported.

2.3.3

VCONN

This power input is connected to a power source that can be a 5 V power supply. It is used to provide power to

the local plug. It is internally connected to power switches that are protected against short-circuit and overvoltage.

This does not require any protection on the input side. When a valid source-to-sink connection is determined

Section 3.4 VCONN supply). If not used, VCONN can be left floating.

2.3.4

RESET

Active high reset.

2.3.5

I²C interface pins

Name

Description

SCL

I²C clock – need external pull-up

SDA

I²C data – need external pull-up

ALERT#

I²C interrupt – need external pull-up

ADDR0

I²C device address bit (see Section 5 I²C interface)

2.3.6

GND

Ground.

2.3.7

MOSI

Master out slave in: data from the connected CC line are decoded using the BMC and then transmitted via the

STUSB1602 to the MCU. Data are valid on the falling edge of the SCLK line and must be sampled by the MCU on

this edge.

2.3.8

NSS

The chip select signal is driven by the STUSB1602 and is connected to the MCU. It activates the SPI/MSP

interface transfer. The NSS signal drives the MCU so that:

•

When TX_EN is asserted (TX mode), the STUSB1602 transmits data from the MCU over the CC line. Note,

the MCU must provide data to be encoded on the MISO line which must be in synchrony with the SCLK

•

When TX_EN is not asserted (RX mode, default), the CC line is activity detected, data are received, and the

BMC is decoded by the STUSB1602. Decoded data are sent on the MOSI line in synchrony with the SCLK

STUSB1602

Pin description

DS11254 - Rev 5

page 5/39