FUSB303

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5

PIN DESCRIPTIONS

Table 2. PIN DESCRIPTIONS

Pin #

Name

Type

Description

USB TYPE−C CONNECTOR INTERFACE

1, 2

CC1, CC2

I/O

Type−C Configuration Channel pins used for USB−C receptacles

4

VBUS_DET

Input

VBUS input pin for attach and detach detection

POWER AND GROUND

10

GND

Ground

Ground

12

VDD

Power

Input Supply Voltage

6

INT_N/OUT3

Open−Drain

Output

the active LOW open drain interrupt output used to prompt the processor to read the

When the device is in GPIO mode (see ADDR/ORIENT pin), this pin is OUT3, an open

drain output

LOW = Audio Accessory detected

HIGH−Z = Audio Accessory not detected

7

SDA/OUT1

Open Drain

I/O

ORIENT pin), SDA/OUT1 is the SDA data signal and SCL/OUT2 is the SCL clock

When the device is in GPIO mode (see ADDR/ORIENT pin), these pins are OUT1 and

OUT2 inputs (I) or outputs (O) are shown below:

ID pin

OUT1 (I/O)

OUT2 (I/O)

Functionality

HIGH−Z

HIGH−Z (O)

LOW (O)

No Device Attached

HIGH−Z

HIGH−Z (O)

HIGH−Z (O)

Sink with Default Current

HIGH−Z

LOW (O)

HIGH−Z (O)

Sink with 1.5 A Current

HIGH−Z

LOW (O)

LOW (O)

Sink with 3 A Current

LOW

HIGH (I)

HIGH (I)

Source with Default Current

LOW

LOW (I)

HIGH (I)

Source with 1.5 A Current

LOW

LOW (I)

LOW (I)

Source with Default Current

LOW

HIGH (I)

LOW (I)

Reserved (Do Not Use)

8

SCL/OUT2

Open Drain

I/O

GPIO PIN INTERFACE

3

PORT/

DEBUG_N

Input then

Push/Pull

Output

PORT/DEBUG_N is a dual function pin: 3 state input to set the port role. On the falling

edge of EN_N and when VDD is active or during power up when EN_N is LOW, the

HIGH = FUSB303 as a Source Only port

Float = FUSB303 as a Dual Role Port (DRP)

LOW = FUSB303 as a Sink Only port

Subsequently, this pin is the DEBUG_N push−pull output

LOW = Debug Accessory detected

HIGH = Debug Accessory not detected

5

ADDR/

ORIENT

Input then

Push/Pull

Output

address or for GPIO mode. On the falling edge of EN_N and when VDD is active or

during power up when EN_N is LOW, the state of this pin is sampled. This pin is also

Float = GPIO mode

Subsequently, this pin is the ORIENT push−pull output

LOW = CC is CC1 or A5 of the USB−C receptacle

HIGH = CC is CC2 or B5 of the USB−C receptacle

9

ID

Open−Drain

Output

Open drain output that indicate FUSB303’s detection state as a Source or Sink

LOW = FUSB303 attached as a Source

HIGH−Z = FUSB303 attached as a Sink

11

EN_N

Input

Active LOW device enable input (has internal pull up resistor)