USB4712 datasheet(10/43 Pages) MICROCHIP

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USB4712

DS00002774G-page 10

 2018-2021 Microchip Technology Inc.

3.2

Pin Descriptions

TABLE 3-2:

PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

USB Interface

USB Upstream D+

USBH_DP0

I/O-U

Upstream USB 2.0 Data Plus (D+)

USB Upstream D-

USBH_DM0

I/O-U

Upstream USB 2.0 Data Minus (D-)

USB

Downstream Port

1 D+

FLEX_USB_DP1

I/O-U

Downstream USB 2.0 Port 1 Data Plus (D+)

USB

Downstream Port

1 D-

FLEX_USB_DM1

I/O-U

Downstream USB 2.0 Port 1 Data Minus (D-)

USB Port Control Pins

USB Port 1 Power

Enable

PRT_CTL1

I/O12

Active high control signal to enable power to downstream

port 1.

USB Port 1 Over-

current Sense

OCS1

I/O12

Overcurrent sense for port 1.

SPI Interface Pins

SPI Clock

SPI_CLK

I/O4

SPI clock.

SPI Data Out

SPI_DO

I/O4

SPI output data. If the SPI interface is enabled, this signal

is the data out for the SPI port.

SPI Data In

SPI_DI

I/O4

SPI input data. If the SPI interface is enabled, this signal

must have a weak pull-down applied at all times to pre-

vent floating.

Note:

If SPI interface is not utilized, this pin cannot

be left floating. It must be connected per the

CFG_BC_EN pin description.

SPI Chip

Enable

SPI_CE_EN

I/O4

Active low SPI chip enable input. If the SPI interface is

enabled, this pin must be driven high in powerdown

states.

Note:

If SPI interface is not utilized, this pin cannot

be left floating. It must be connected per the

CFG_NON_REM pin description.

SQI Interface Pins

SQI Clock

SQI_CLK

I/O4

SQI clock.

SQI Data 0-3

SQI_D[0:3]

I/O4

SQI Data 0-3. If the SQI interface is enabled, these sig-

nals function as Data 0 through 3.

SQI Chip

Enable

SQI_CE_EN

I/O4

Active low SQI chip enable input. If the SQI interface is

enabled, this pin requires an external pull-up resistor.

Note:

If SQI interface is not utilized, this pin cannot

be left floating. It must be connected per the

CFG_NON_REM pin description.

SMBus Interface Pins

SMBus 1 Clock

SMB1_CLK

I/OD12

SMBus 1 Master Clock

Note:

Not available on USB4712PF - HFC is dis-

abled by default.

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