Pin

Name

Type

Description

Typical connection

13

ADDR0

DI

I²C device address setting (see Section 5 I²C

interface)

Static

14

MISO

DI

Master in slave out: serial data from MCU to

STUSB1702 encoded in BMC to drive the CC

line

From MCU, ext. pull-up referenced

to MCU Vio

15

TX_EN

DI

TX enable, open drain active high to drive CC

line from the embedded BMC interface

From MCU, needs to be

maintained low by MCU or pulled

down when receiving standby

16

SCLK

DO

Serial clock to clock data transfer between

MCU and the STUSB1702. Open drain output

pin, needs external pull-up referenced to MCU

Vio

To MCU, ext. pull-up referenced to

MCU Vio

17

A_B_SIDE

OD

Cable orientation, active low open drain

USB super speed MUX select, ext.

pull-up

18

VBUS_SENSE

HV AI

VBUS voltage monitoring and discharge path

From VBUS

19

NC

HV AIO

Not connected

Open

20

VBUS_EN_SRC

HV AIO

VBUS source power path enable, active low

open drain

To switch or power system, ext.

pull-up

21

VREG_1V2

PWR

1.2 V internal regulator output

1 µF typ. decoupling capacitor

22

VSYS

PWR

Power supply from system

From power system, connect to

ground if not used

23

VREG_2V7

PWR

2.7 V internal regulator output

1 µF typ. decoupling capacitor

24

VDD

HV PWR

Main power supply from USB power line

From VBUS

-

EP

GND

Exposed pad is connected to ground

To ground

Table 2. Pin function descriptions

Type

Description

D

Digital

A

Analog

O

Output pad

I

Input pad

IO

Bidirectional pad

OD

Open drain output

PD

Pull-down

PU

Pull-up

HV

High voltage

PWR

Power

GND

Ground

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.

STUSB1702

Pin description

DS12664 - Rev 1

page 4/38