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USB3503 Datasheet(PDF) 58 Page - SMSC Corporation

Part # USB3503
Description  USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications
PDF  82 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

USB3503 Datasheet(HTML) 58 Page - SMSC Corporation

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USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications
Datasheet
SMSC USB3503A
58
Revision 1.1 (02-07-13)
DATASHEET
6
HubContrCurrent
1
user
Maximum current requirements of the Hub Controller
electronics in 1 mA increments. See Section 11.23.2.1
in the USB Specification for additional details on the use
of this field.
This field reports the maximum current that only the hub
consumes from upstream VBUS when fully operational.
This value includes all support circuitry associated with
the hub (but does not include the current consumption
of any permanently attached peripherals if the hub is
part of a compound device).
The Hub supports Self-Powered and Bus-Powered
operation. The SELF_BUS_PWR bit
(CONFIG_BYTE_1) defined in Section 5.3.7, "Register
06h: CONFIG_BYTE_1 - CFG1," on page 29 is used to
determine which of the stored values are reported. The
value reported to the host must coincide with the
current operating mode, and will be determined by the
following rules.
The value that is reported to the host will be:
‘HC_MAX_C_BP’ if SELF_BUS_PWR = ‘0’
‘HC_MAX_C_SP’ if SELF_BUS_PWR = ‘1’
‘HC_MAX_C_BP/SP’ are defined in Section 5.3.15, and
Section 5.3.16, "Register 0Fh: Hub Controller Max
Current For Bus Powered Operation - HCMCB," on
page 33. In all cases the reported value is sourced from
the Hub Controller Max Current data field (for Self or
Bus power) that was determined by Internal Default, or
serial port load.
7
DeviceRemovable
1
user
Indicates if port has a removable device attached. See
Section 11.23.2.1 in the USB Specification.
The value contained in the ‘NR_DEVICE’ field is directly
reported to the host, and is determined by Internal
Default, or serial port load.
8
PortPwrCtrlMask
1
FFh
Field for backwards USB 1.0 compatibility.
Table 7.11 Class-Specific Hub Descriptor (continued)
OFFSET
FIELD
SIZE
VALUE
DESCRIPTION



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