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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!)