TUSB320 datasheet(22/35 Pages) TI1

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A12

B12

A11

A10

B10

B11

VBUS

CC1

CC2

TUSB320

CC1

CC2

VBUS_DET

USB VBUS Switch

(optional BC 1.2 support for legacy)

DM_IN

DP_IN

VOUT

DM_OUT

DP_OUT

VIN

150 uF

System VBUS

PORT

100 nF

VDD_5 V

USB2

Host &

PMIC

4.7 K

SDA/OUT1

SCL/OUT2

INT_N/OUT3

200 K

I2C I/O

1.8 V or 3.3 V

SCL

SDA

FAULT#

PS_EN

PS_FAULT#

INT#

SCL

SDA

4.7 K

TUSB320, TUSB320I

SLLSEN9C – MAY 2015 – REVISED SEPTEMBER 2016

www.ti.com

Product Folder Links: TUSB320 TUSB320I

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8.2.2 DFP in I2C Mode

Figure 12 shows the TUSB320 device configured as a DFP in I2C mode.

Figure 12. DFP in I2C Mode Schematic

8.2.2.1 Design Requirements

For this design example, use the parameters listed in Table 10:

Table 10. Design Requirements for DFP in I2C Mode

DESIGN PARAMETER

VALUE

VDD (2.75 V to 5 V)

5 V

Mode (I2C or GPIO)

I2C

ADDR pin must be pulled down or pulled up

I2C address (0x61 or 0x60)

0x60

ADDR pin must be pulled low or tied to GND

Type-C port type (UFP, DFP, or DRP)

DFP

PORT pin is pulled up

Shutdown support (EN_N Control)

8.2.2.2 Detailed Design Procedure

The TUSB320 device supports a VDD in the range of 2.75 V to 5 V. In this particular case, VDD is set to 5 V. A

100-nF capacitor is placed near VDD.

The TUSB320 device is placed into I2C mode by either pulling the ADDR pin high or low. In this particular case,

the ADDR pin is tied to GND which results in a I2C address of 0x60. The SDA and SCL must be pulled up to

either 1.8 V or 3.3 V. When pulled up to 3.3 V, the VDD supply must be at least 3 V to keep from back-driving the

I2C interface.

The TUSB320 device can enter shutdown mode by pulling the EN_N pin high, which puts the TUSB320 device

into a low power state. In this case, external control of the EN_N pin is not implemented and therefore the EN_N

pin is tied to GND.

The INT_N/OUT3 pin is used to notify the PMIC when a change in the TUSB320 I2C registers occurs. This pin is

an open drain output and requires an external pullup resistor. The pin should be pulled up to VDD using a 200-kΩ

resistor.

TUSB320 Datasheet(PDF) 22 Page - Texas Instruments

TUSB320 Datasheet(HTML) 22 Page - Texas Instruments

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