USB84604 datasheet(15/61 Pages) MICROCHIP

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 2014-2016 Microchip Technology Inc.

DS60001295C-page 15

USB84604

Suspend

Output

SUSPEND

Firmware 1070, 1080: This signal is used to indi-

cate that the entire hub has entered the USB sus-

pend state and that VBUS current consumption

should be reduced in accordance with the USB

specification [ 2]. Refer to Section 8.6, "Suspend

(SUSPEND)," on page 39 for additional informa-

tion.

Note:

SUSPEND is disabled by default and

must be enabled via the ProTouch

configuration tool.

General Pur-

pose I/O 0

PIO0

IS/O8/

OD8

Firmware 1070, 1080: General purpose I/O 0

Note:

If the SUSPEND output is disabled,

this pin may be used as PIO0.

SOF Syn-

chronized

8 kHz Clock

Output

SOF

This signal outputs an 8 kHz clock synchronized

with the USB Host SOF.

Note:

SOF output is controlled via the

SOF_ENABLE bit in the UTIL_CON-

FIG1 register. This feature is not

enabled by default.

General Pur-

pose I/O 1

PIO1

IS/O8/

OD8

General purpose I/O 1

Note:

If the SOF output is disabled, by clear-

ing the SOF_ENABLE bit in the UTIL_-

CONFIG1 register, this pin may be

used as PIO1.

Detect

Upstream

VBUS Power

VBUS_DET

Detects state of upstream bus power.

When designing a detachable hub, this pin must

be connected to the VBUS power pin of the

upstream USB port through a resistor divider

(50 kΩ by 100 kΩ) to provide 3.3 V.

For self-powered applications with a permanently

attached host, this pin must be connected to

either 3.3 V or 5.0 V through a resistor divider to

provide 3.3 V.

In embedded applications, VBUS_DET may be

controlled (toggled) when the host desires to

renegotiate a connection without requiring a full

reset of the device.

General Pur-

pose I/O 16

PIO16

IS/O8/

OD8

General purpose I/O 16

TABLE 3-1:

PIN DESCRIPTIONS (CONTINUED)

Num Pins

Name

Symbol

Buffer

Type

Description

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