USB2502-HT datasheet(16/40 Pages) MICROCHIP

16 / 40 page

USB2502

DS000002248A-page 16

 2007 - 2016 Microchip Technology Inc.

5.2.3.3

EEPROM Offset 5:4(h) - Device ID

5.2.3.4

EEPROM Offset 6(h) - CONFIG_BYTE_1

5.2.3.5

EEPROM Offset 7(h) - CONFIG_BYTE_2

Bit Number

Bit Name

Description

15:8

DID_MSB

Most Significant Byte of the Device ID.

7:0

DID_LSB

Least Significant Byte of the Device ID.

Bit Number

Bit Name

Description

SELF_BUS_PWR

Self or Bus Power: Selects between Self- and Bus-Powered operation.

0 = Bus-Powered operation. (BUS Default)

1 = Self-Powered operation. (SELF Default)

Note:

If Dynamic Power Switching is enabled, this bit is ignored and the

SELF_PWR pin is used to determine if the hub is operating from self

or bus power.

Reserved

HS_DISABLE

High Speed Disable: Disables the capability to attach as either a High/Full-

speed device, and forces attachment as Full-speed only i.e. (no High-Speed

support).

0 = High-/Full-Speed. (Default)

1 = Full-Speed-Only (High-Speed disabled!)

Reserved

EOP_DISABLE

EOP Disable: Disables EOP generation at EOF1 when no downstream

directed traffic is in progress.

0 = EOP generation at EOF1 is enabled.

1 = EOP generation at EOF1 is disabled, (normal operation). (Default)

2:1

CURRENT_SNS

Over Current Sense: Indicates whether current sensing is ganged.

00 = Ganged sensing (all ports together). (Default for self-power)

01 = Reserved

1x = Over current sensing not supported. (may be used with Bus-Powered

configurations only!, and is the default for bus-power)

Reserved

Bit Number

Bit Name

Description

DYNAMIC

Dynamic Power Enable: Controls the ability for the Hub to transition to Bus-

Powered operation if the local power source is removed (can revert back to

Self-Power if local power source is restored).

0 = No Dynamic auto-switching.

1 = Dynamic Auto-switching capable.(Default)

Reserved

5:4

OC_TIMER

OverCurrent Timer: Over Current Timer delay.

00 = 0.1ms

01 = 2ms (Default)

10 = 4ms

11 = 6ms

COMPOUND

Compound Device: Designates if Hub is part of a compound device.

0 = No. (Default)

1 = Yes, Hub is part of a compound device.

2:0

Reserved

Reserved.

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