SMSC USB464 User Manual
Page 41
High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i
41
Revision 1.0 (06-01-09)
DATASHEET
8.4.4.3
E0h: Product ID (LSB)
8.4.4.4
E1h: Product ID (MSB)
8.4.4.5
E2h: Device ID (LSB)
8.4.4.6
E3h: Device ID (MSB)
8.4.4.7
E4h: Configuration Data Byte 1 (CFG_DAT_BYT1)
BIT
NAME
DESCRIPTION
7:0
PID_LSB
Least Significant Byte of the Product ID. This is a 16-bit value that the vendor
can assign that uniquely identifies this particular product.
BIT NAME
DESCRIPTION
7:0
PID_MSB
Most Significant Byte of the Product ID. This is a 16-bit value that the vendor
can assign that uniquely identifies this particular product.
BIT
NAME
DESCRIPTION
7:0
DID_LSB
Least Significant Byte of the Device ID. This is a 16-bit device release
number in BCD (binary coded decimal) format.
BIT
NAME
DESCRIPTION
7:0
DID_MSB
Most Significant Byte of the Device ID. This is a 16-bit device release
number in BCD format.
BIT
NAME
DESCRIPTION
7
SELF_BUS_PWR
Self- or Bus-Power: Selects between self- and bus-powered operation.
The hub is either self-powered (draws less than 2 mA) or bus-powered
(limited to 100 mA maximum power prior to being configured by the host
controller).
When configured as a bus-powered device, the SMSC hub consumes less
than 100 mA of current prior to being configured. After configuration, the bus-
powered SMSC hub (along with all associated hub circuitry, any embedded
devices if part of a compound device, and 100 mA per externally available
downstream port) must consume no more than 500 mA of current. The
current consumption is system dependent, and the OEM must ensure that
the USB 2.0 specifications are not violated.
When configured as a self-powered device, <1 mA of current is consumed
and all ports are available, with each port being capable of sourcing 500 mA
of current.
‘0’ = Bus-powered operation
‘1’ = Self-powered operation
6
Reserved
Reserved
5
HS_DISABLE
Hi-Speed Disable: Disables the capability to attach as either a Hi-/Full-Speed
device, and forces attachment as Full-Speed only (i.e. no Hi-Speed support).
‘0’ = Hi-/Full-Speed
‘1’ = Full-Speed-Only (Hi-Speed disabled!)