CY7C65620 Cypress Semiconductor Corporation., CY7C65620 Datasheet - Page 11

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

Document #: 38-08037 Rev. *J
Note
Hub Descriptor
6. This value is configured through the External EEPROM
Byte
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 CY7C656xx)
0: Hub is not part of a compound device (Default in CY7C656xx),
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 over-current status (Default in CY7C656xx).
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 CY7C656xx).
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
Supported USB
Requests. (Default in CY7C656xx).
Description
Functional Overview
CY7C656xx
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