USB3613 datasheet(12/57 Pages) MICROCHIP

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USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications

Datasheet

DS00001714A-page 12

 2014 Microchip Technology Inc.

I2C/SMBUS INTERFACE

I2C Serial

Clock Input

SCL

I_SMB

I2C serial clock input.

SMBus Clock

SMBCLK

I_SMB

SMBus serial clock input.

I2C Serial

Data

SDA

IS/OD8

I2C bidirectional serial data.

SMBus Serial

Data

SMBDATA

IS/OD8

SMBus bidirectional serial data.

SPI MASTER INTERFACE

SPI Chip

Enable

Output

SPI_CE_N

O12

Active-low SPI chip enable output.

Note:

If the SPI is enabled, this pin will be

driven high in powerdown states.

SPI Clock

Output

SPI_CLK

O12

SPI clock output

SPI Data

Output

SPI_DO

O12

SPI data output

SPI Speed

Select

Configuration

Strap

SPI_SPD_SEL

(PD)

This strap is used to select the speed of the SPI.

0 = 30MHz (default)

1 = 60MHz

Note:

If the latched value on reset is 1, this pin

is tri-stated when the chip is in the

suspend state. If the latched value on

reset is 0, this pin is driven low during a

suspend state.

See Note 3.2 for more information on

configuration straps.

SPI Data

Input

SPI_DI

(PD)

SPI data input

MISC.

Reference

Clock Input

REFCLK

ICLK

This signal is the reference clock input. The clock

input frequency is configured via REFSEL[1:0].

Refer to Section 8.4, "Reference Clock," on

page 41 for additional information.

Reference

Clock Select

0 Input

REFSEL0

This signal, combined with REFSEL1, selects the

reference clock input frequency. The reference

select input must be set to correspond to the

frequency applied to the REFCLK input. Refer to

Section 8.4, "Reference Clock," on page 41 for

additional information.

Table 3.1 Ball Descriptions (continued)

NUM

BALLS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

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