USB2513 datasheet(19/48 Pages) SMSC

19 / 48 page

USB 2.0 High-Speed 3-Port Hub Controller

Datasheet

SMSC USB2513

Revision 1.98 (11-19-07)

DATASHEET

4.3

EEPROM Interface

The SMSC Hub can be configured via a 2-wire (I2C) EEPROM (256x8). (Please see Table 3.1 for

specific details on how to enable configuration via an I2C EEPROM).

The Internal state-machine will (when configured for EEPROM support) read the external EEPROM for

configuration data. The hub will then “attach” to the upstream USB host.

Note: The Hub does not have the capacity to write, or “Program,” an external EEPROM. The Hub

only has the capability to read external EEPROMs. The external eeprom will be read (even if

it is blank or non-populated), and the hub will be “configured” with the values that are read.

Please see Internal Register Set (Common to EEPROM and SMBus) for a list of data fields available.

4.3.1

Internal Register Set (Common to EEPROM and SMBus)

Table 4.2 Internal Default, EEPROM and SMBus Register Memory Map

REG

ADDR

R/W

ABBR

INTERNAL

DEFAULT ROM

SMBUS AND

EEPROM POR

VALUES

00h

R/W

VID LSB

VIDL

24h

0x00

01h

R/W

VID MSB

VIDM

04h

0x00

02h

R/W

PID LSB

PIDL

13h

0x00

03h

R/W

PID MSB

PIDM

25h

0x00

04h

R/W

DID LSB

DIDL

00h

0x00

05h

R/W

DID MSB

DIDM

00h

0x00

06h

R/W

Config Data Byte 1

CFG1

9Bh

0x00

07h

R/W

Config Data Byte 2

CFG2

10h

0x00

08h

R/W

Config Data Byte 3

CFG3

00h

0x00

09h

R/W

Non-Removable Devices

NRD

00h

0x00

0Ah

R/W

Port Disable (Self)

PDS

00h

0x00

0Bh

R/W

Port Disable (Bus)

PDB

00h

0x00

0Ch

R/W

Max Power (Self)

MAXPS

01h

0x00

0Dh

R/W

Max Power (Bus)

MAXPB

64h

0x00

0Eh

R/W

Hub Controller Max Current

(Self)

HCMCS

01h

0x00

0Fh

R/W

Hub Controller Max Current

(Bus)

HCMCB

64h

0x00

10h

R/W

Power-on Time

PWRT

32h

0x00

11h

R/W

LANG_ID_H

LANGIDH

00h

0x00

12h

R/W

LANG_ID_L

LANGIDL

00h

0x00

13h

R/W

MFR_STR_LEN

MFRSL

00h

0x00

14h

R/W

PRD_STR_LEN

PRDSL

00h

0x00

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