USB2524 datasheet(11/58 Pages) MICROCHIP

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 2013 - 2016 Microchip Technology Inc.

DS00001588B-page 11

USB2524

Internal Default Configuration

• PRT_ASSIGN[3:0] = Peripheral Mode (Edge Triggered)

• LED Mode = Host Ownership Mode

•Strap

• options on pins LED_A[4:1]_N are enabled.

• Supports unassigned Ports

Internal Default Configuration

• PRT_ASSIGN[3:0] = Peripheral Mode (Edge Triggered)

• LED Mode = Host Ownership & Port Speed Mode

• Strap options on pins LED_A[4:1]_N are disabled

• Supports unassigned Ports.

110

Reserved

111

Reserved

TABLE 4-3:

MISCELLANEOUS PINS

Name

Symbol

Type

Function

Crystal

Input/External

Clock Input

XTAL1/

CLKIN

ICLKx

24MHz crystal or external clock input.

This pin connects to either one terminal of the crystal or

to an external 24MHz clock when a crystal is not used.

Note:

See Table 11-1 for the required logic voltage

levels of this pad if it will be driven by an exter-

nal clock source.

Crystal Output

XTAL2

OCLKx

24MHz Crystal

This is the other terminal of the crystal, or left

unconnected when an external clock source is used to

drive XTAL1/CLKIN. It must not be used to drive any

external circuitry other than the crystal circuit.

RESET Input

RESET_N

This active low signal is used by the system to reset the

chip. The minimum active low pulse is 1us.

Self-Power /

Bus-Power

Detect

SELF_PWR

Detects availability of local self-power source.

Low = Self/local power source is NOT available (i.e., Hub

gets all power from Upstream USB VBus).

High = Self/local power source is available.

TEST Pin

TEST

IPD

Used for testing the chip. User must treat as a no-

connect or connect to ground.

TABLE 4-2:

SMBUS OR EEPROM INTERFACE BEHAVIOR (CONTINUED)

Name

Function

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