CY7C65620-56LTXI CYPRESS [Cypress Semiconductor], CY7C65620-56LTXI Datasheet - Page 12

• Manufacturer Part Number: CY7C65620-56LTXI
• Manufacturer: CYPRESS [Cypress Semiconductor]

Hub Descriptor
Document Number: 38-08037 Rev. *V
Note
Byte
6. This value is configured through the external EEPROM.
3,4
0
1
2
5
6
7
8
All Speed
0x0089
0xAE
0xFF
0x04
0x32
0x28
0x00
0x09
0x29
0x02
[6]
[6]
[6]
[6]
[6]
[6]
[6]
bLength
bDescriptorType
bNbrPorts
wHubCharacteristics
bPwrOn2PwrGood
bHubContrCurrent
bDeviceRemovable
bPortPwrCtrlMask
Field Name
9 bytes
HUB descriptor
Number of ports supported, CY7C65630
Number of ports supported, CY7C65620
b1, b0: Logical power switching mode
b2: Identifies a compound device
b4, b3: Overcurrent protection mode
b6, b5: TT think time
b7: Port indicators supported,
b15, b8: Reserved
Time from when the port is powered to when the power is good on that port.
Maximum current requirement for the hub controller at full-speed.
Maximum current requirement for the hub controller at high-speed.
Indicates if the logical port has a removable device attached (0 = removable,
1 = non removable).
Required for compatibility with software written for 1.0 compliant devices.
00: Ganged power switching (all ports’ power at once).
01: Individual port power switching (Default in CY7C65620/CY7C65630).
0: Hub is not part of a compound device (Default in CY7C65620/CY7C65630).
1: Hub is part of a compound device.
00: Global overcurrent protection. The hub reports overcurrent as a
summation of all ports’ current draw, without a breakdown of individual port
overcurrent status.
01: Individual port overcurrent protection. The hub reports overcurrent on a
per-port basis. Each port has an overcurrent status (Default in
CY7C65620/CY7C65630).
1X: No overcurrent protection. This option is allowed only for bus powered
hubs that do not implement overcurrent protection.
00: TT requires at most eight FS bit times of inter transaction gap on a full/low-
speed downstream bus (Default in CY7C65620/CY7C65630).
0: Port indicators are not supported on its downstream facing ports and the
SetPortIndicator request has no effect.
1: Port indicators are supported on its downstream facing ports and the
SetPortIndicator request controls the indicators. See
on page 4 and
CY7C65620/CY7C65630).
“Supported USB Requests”
Description
CY7C65620/CY7C65630
on page 17. (Default in
“Functional Overview”
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