USB2422SLASHMJ datasheet(24/51 Pages) SMSC

24 / 51 page

2-Port USB 2.0 Hi-Speed Hub Controller

Datasheet

Revision 1.0 (06-04-13)

SMSC USB2422

DATASHEET

4.4

SMBus Registers

This section details the device SMBus registers.

Note: Internal Default ROM values are not visible to THE SMBus interface and cannot be read. When

the hub is configured for SMBus register load, the entire register set must be written.

Table 4.3 Internal Default and SMBus Register Memory Map

REG.

ADDRESS

TYPE

INTERNAL

DEFAULT

ROM

SMBUS &

EEPROM

DEFAULT

00h

R/W

Vendor ID Least Significant Bit Register (VIDL)

24h

00h

01h

R/W

Vendor ID Most Significant Bit Register (VIDM)

04h

00h

02h

R/W

Product ID Least Significant Bit Register (PIDL)

22h

00h

03h

R/W

Product ID Most Significant Bit Register (PIDM)

24h

00h

04h

R/W

Device ID Least Significant Bit Register (DIDL)

A0h

00h

05h

R/W

Device ID Most Significant Bit Register (DIDM)

00h

06h

R/W

Configuration Data Byte 1 Register (CFG1)

8Bh

00h

07h

R/W

Configuration Data Byte 2 Register (CFG2)

20h

00h

08h

R/W

Configuration Data Byte 3 Register (CFG3)

02h

00h

09h

R/W

Non-Removable Device Register (NRD)

00h

0Ah

R/W

Port Disable for Self-Powered Operation Register (PDS)

00h

0Bh

R/W

Port Disable for Bus-Powered Operation Register (PDB)

00h

0Ch

R/W

Max Power for Self-Powered Operation Register (MAXPS)

01h

00h

0Dh

R/W

Max Power for Bus-Powered Operation Register (MAXPB)

32h

00h

0Eh

R/W

Hub Controller Max Current for Self-Powered Operation Register

(HCMCS)

01h

00h

0Fh

R/W

Hub Controller Max Power for Bus-Powered Operation Register

(HCMCB)

32h

00h

10h

R/W

Power-On Time Register (PWRT)

32h

00h

11h

R/W

Language ID High Register (LANGIDH)

00h

12h

R/W

Language ID Low Register (LANGIDL)

00h

13h

R/W

Manufacturer String Length Register (MFRSL)

00h

14h

R/W

Product String Length Register (PRDSL)

00h

15h

R/W

Serial String Length Register (SERSL)

00h

16h-53h

R/W

Manufacturer String Registers (MANSTR)

00h

54h-91h

R/W

Product String Registers (PRDSTR)

00h

92h-CFh

R/W

Serial String Registers (SERSTR)

00h

D0h

R/W

Battery Charging Enable Register (BC_EN)

00h

E0h-F5h

RESERVED

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