ISP1521 datasheet(19/53 Pages) PHILIPS

19 / 53 page

Philips Semiconductors

ISP1521

Hi-Speed USB hub controller

Product data

Rev. 03 — 24 November 2004

19 of 53

9397 750 13702

9.2.3

ROM or EEPROM map

Remark: A 128-byte EEPROM supports one language ID only, and a 256-byte

EEPROM supports two language IDs.

9.2.4

ROM or EEPROM detailed map

Fig 8.

ROM or EEPROM map.

MLD714

Signature

00H

02H

10H

7FH

FFH

80H

0AH

Device Descriptor

String Descriptor

(first Language ID):

iManufacturer string

iProduct string

iSerial Number string

String Descriptor

(second Language ID):

iManufacturer string

iProduct string

iSerial Number string

Language ID

Table 12:

ROM or EEPROM detailed map

Address

(hex)

Content

Default

(hex)

Example

(hex)

Comment

Signature descriptor

signature (low)

signature to signify valid data comment

signature (high)

Device descriptor

idVendor (low)

Philips Semiconductors vendor ID

idVendor (high)

idProduct (low)

ISP1521 product ID

idProduct (high)

bcdDevice (low)

device release; silicon revision

increments this value

bcdDevice (high)

RSV, iSN, iP, iM

if all the three strings are supported, the

value of this byte is 39H

reserved

String descriptor Index 0 (language ID)

bLength[1]

two language ID support

bDescriptorType

03[2]

STRING

wLANGID[0]

LANGID code zero (ﬁrst language ID)

(English—USA in this example)

wLANGID[1]

LANGID code one (second language ID)

(English—UK in this example)

String descriptor Index 1 (iManufacturer)[3]

bLength

string descriptor length (manufacturer ID)

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