USB2524 datasheet(44/58 Pages) MICROCHIP

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USB2524

DS00001588B-page 44

 2013 - 2016 Microchip Technology Inc.

Note 9-1

When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than

100mA from the upstream USB power source during t1+t5.

9.1.1.2

RESET_N for EEPROM Configuration

TABLE 9-1:

RESET_N TIMING FOR DEFAULT/STRAP OPTION MODE

Name

Description

MIN

TYP

MAX

Units

RESET_N Asserted.

sec

Strap Setup Time

16.7

nsec

Strap Hold Time.

16.7

1400

nsec

hub outputs driven to inactive logic states

1.5

2.0

sec

USB Attach (See Note 9-1)

100

msec

Host acknowledges attach and signals USB

Reset.

100

msec

USB Idle.

undefined

msec

Completion time for requests (with or without data

stage).

msec

FIGURE 9-2:

RESET_N TIMING FOR EEPROM MODE

TABLE 9-2:

RESET_N TIMING FOR EEPROM MODE

Name

Description

MIN

TYP

MAX

Units

RESET_N Asserted.

sec

Hub Recovery/Stabilization.

500

sec

EEPROM Read / Hub Config.

2.0

99.5

msec

USB Attach (See Note 9-2)

100

msec

RESET_N

VSS

Hardware

reset

asserted

Read Strap

Options

Read EEPROM

Set Options

Attach

USB

Upstream

USB Reset

recovery

Idle

Start

completion

request

response

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