CY7C65620 Cypress Semiconductor Corporation., CY7C65620 Datasheet - Page 14

• Manufacturer Part Number: CY7C65620
• Description: Low-power Usb 2.0 Hub Controller Family
• Manufacturer: Cypress Semiconductor Corporation.

Byte 7: EnabledOvercurrentTimer[3:0], DisabledOvercur-
Byte 8: MaximumPower (Full-Speed)
Byte 9: MaximumPower (High-Speed)
Byte 10: Reserved
Byte 11: Reserved
Byte 12: HubControllerPower (Full-Speed, bus powered)
Byte 13: HubControllerPower (High-speed, bus powered)
Byte 14: HubControllerPower (Full-Speed, self powered)
Byte 15: HubControllerPower (High-speed, self powered)
Byte 16: PowerOnTimer
Byte
Full-speedOnly,
GangPowered, Reserved
Document #: 38-08037 Rev. *J
Count time in ms for filtering overcurrent detection. Bits 7–4
are for an enabled port, and bits 3–0 are for a disabled port.
Both range from 0 ms to 15 ms. See section
Indicators” on page
This value is reported in the ConfigurationDescriptor:bMax-
Power field and is the current in 2-mA increments that is re-
quired from the upstream hub when connected at full-speed.
Default: 0x28 = 80 mA for full-speed.
This value is reported in the ConfigurationDescriptor:bMax-
Power field and is the current in 2-mA increments that is re-
quired from the upstream hub when connected at high-speed.
Default: 0x57 = 174 mA for high-speed.
Write zeros to this location.
Write zeros to this location.
This value is reported in the HubDescriptor:bHubContrCur-
rent field and is the current in milliamperes required by the
hub controller when connected on the upstream hub as a
full-speed. Default: 0x50 = 80 mA for full-speed.
This value is reported in the HubDescriptor:bHubContrCur-
rent field and is the current in milliamperes required by the
hub controller when connected on the upstream hub as a
high-speed. Default: 0xAE = 174 mA for high-speed.
This value is reported in the HubDescriptor:bHubContrCur-
rent field and is the current in milliamperes required by the
hub controller when connected on the upstream hub as a
full-speed. Default: 0x50 = 80 mA for full-speed.
This value is reported in the HubDescriptor:bHubContrCur-
rent field and is the current in milliamperes required by the
hub controller when connected on the upstream hub as a
high-speed. Default: 0x64 = 100 mA for high-speed.
This
bPwrOn2PwrGood field and is the time in 2-ms increments
from the SetPortPower command until the power on the cor-
responding downstream port is good. Default: 0x32 = 100 ms.
Bit 7: IllegalHubDescriptor. For GetHubDescriptor request,
some USB hosts use a DescriptorTypeof 0x00 instead of
HUB_DESCRIPTOR, 0x29. According to the USB 2.0 stan-
dard, a hub must treat this as a Request Error, and STALL the
transaction accordingly (USB 2.0, 11.24.2.5). For systems
rentTimer[3:0]
17:
value
IllegalHubDescriptor,
is
4. Default: 8 ms = 0x88.
reported
NoPortIndicators,
in
the
CompoundDevice,
HubDescriptor:
Reserved,
”Port
Byte 18: AmberPolarity, GreenPolarity, SelfPowerable,
ModulateIndicators, PowerControlPolarity, OverCurrentPo-
larity, OverCurrentMode1, OverCurrentMode2
Byte 19: Write Protect
Byte 20: NumLangs
that do not accept this, the IllegalHubDescriptor configuration
bit may be set to allow CY7C656xx to accept a Descriptor-
Type of 0x00 for this command. Default set to 1.
Bit 6: CompoundDevice. Indicates whether the hub is part of
a compound device. This is reported in the HubDescriptor,
wHub-Characteristics: b2. Default is set to ’0’.
Bit 5: Fullspeed. Only configures the hub to be a full-speed
only device. Default is set to ’0’.
Bit 4: NoPortIndicators. Turns off the port indicators and does
not report them as present in the HubDescriptor, wHubChar-
acteristics b7 field. Default is set to ’0’.
Bit 3: Reserved. Set this bit to ‘0’.
Bit 2: GangPowered. Indicates whether the port power
switching is ganged (set to 1) or per-port (set to ’0’). This is
reported in the HubDescriptor, wHubCharacteristics field, b4,
b3, b1, and b0. Default is set to ’0’.
Bit 1: Reserved. Default is set to ’0’.
Bit 0: Reserved. Default is set to ’0’.
Bit 7: AmberPolarity. Indicates the polarity of the amber indi-
cator control. (1 = high, 0 = low)
Bit 6: GreenPolarity. Indicates the polarity of the green indica-
tor control. (1 = high, 0 = low)
Bit 5: SelfPowerable. Indicates whether the hub is capable of
operating in self-powered mode. If ‘0’, the hub is capable of
bus-powered operation only.
Bit 4: ModulateIndicators. If this bit is set, the indicator outputs
are modulated by a square wave of 120 Hz, for power sav-
ings. If ‘0’, the outputs are static.
Bit 3: PowerControlPolarity. If set, the power control outputs
are active HIGH. If not set, the power control outputs are ac-
tive LOW.
Bit 2: OverCurrentPolarity. If set, the over-current inputs are
active HIGH. If not set, the over-current inputs are active
LOW.
Bit 1: OverCurrentMode1. Reported as bit 4 of the wHubChar-
acteristics field of the hub descriptor. If set to ‘1’, this bit dis-
ables over-current detection.
Bit 0: OverCurrentMode2. Reported as bit 3 of the wHubChar-
acteristics field of the hub descriptor. If Bit 1 of this byte is set
to ‘0’, over-current detection is enabled. If this bit (Bit 0) is set
to ‘1’, the hub reports over-current on a per-port basis. If set
to ‘0’, the hub reports over-current as the summation of all
ports’ current draw.
Writing the value 0x42 to this field enables Write Protect and
any future writes to the EEPROM will fail. Default is set to ‘0’.
Number of supported string languages. CY7C656xx supports
a maximum of 31 languages; if this field is set to ’0’ or a num-
ber larger than 31, all string support is disabled.
CY7C656xx
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