Datasheet

High-Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
Datasheet
Revision 1.3 (03-13-13) 46 SMSC USB4640/USB4640i
DATASHEET
4.4.4.24 F7h-FBh: Not Applicable
4.4.4.25 FCh-FFh: Non-Volatile Storage Signature
4.4.5 Internal Flash Media Controller Extended Configurations
Enable registers 100h-17Fh by setting bit 7 of bmAttribute.
4.4.5.1 100h-106h: Combo LUN 0 Identifier String
4.4.5.2 107h-17Bh: Not Applicable
4.4.5.3 17Ch -17Fh: Non-Volatile Storage Signature for Extended Configuration
4.4.6 I
2
C EEPROM
The I
2
C EEPROM interface implements a subset of the I
2
C Master Specification (refer to I
2
C-Bus
Specification
[6] for I
2
C bus protocols). The device’s I
2
C EEPROM interface is designed to attach to a
single dedicated I
2
C EEPROM, and it conforms to the Standard-mode I
2
C Specification (100 kbps
transfer rate and 7-bit addressing) for protocol and electrical compatibility.
Note: Extensions to the
I
2
C Specification are not supported. The device acts as the master and
generates the serial clock
SCL, controls the bus access (determines which device acts as the
transmitter and which device acts as the receiver), and generates the START and STOP
conditions.
BIT BYTE NAME DESCRIPTION
7:0 N/A
BYTE NAME DESCRIPTION
3:0 NVSTORE_SIG This signature is used to verify the validity of the data in the first 256 bytes of
the configuration area. The signature must be set to
ATA2 for
USB4640/USB4640i.
BYTE NAME DESCRIPTION
6:0 CLUN0_ID_STR If the device to LUN mapping bytes have configured this LUN to be a combo
LUN, then these strings will be used to identify the LUN rather than the device
identifier strings.
BYTE NAME DESCRIPTION
116:0 N/A
BYTE NAME DESCRIPTION
3:0 NVSTORE_SIG2 This signature is used to verify the validity of the data in the upper 256 bytes
if a 512 byte EEPROM is used, otherwise this bank is a read-only configuration
area. The signature must be set to
ecf1.