Configured 0xD2 Load, Configured 0xD4 Load

PRELIMINARYCY7C656xx

9.2Configured – 0xD2 Load

Byte	Value (MSB->LSB)

0	0xD2

1	VID (LSB)

2	VID (MSB)

3	PID (LSB)

4	PID (MSB)

5	reversed

6	DID (MSB)

7	EnableOverCurrentTimer[3:0], DisableOvercurrent-
	Timer[3:0]

8	ActivePorts[3:0], RemovablePorts[3:0]

9	MaxPower

10	HubControllerPower

11	PowerOnTimer

12	IllegalHubDescriptor, CompoundDevice,
	FullspeedOnly, NoPortIndicators, Reserved,
	GangPowered, SingleTTOnly, Reserved

Byte 0: 0xD2

Needs to be programmed with 0xD2

Byte 1: VID (LSB)

Least Significant Byte of Vendor ID

Byte 2: VID (MSB)

Most Significant Byte of Vendor ID

Byte 3: PID (LSB)

Least Significant Byte of Product ID

Byte 4: PID (MSB)]

Most Significant Byte of Product ID

Byte 5: Reserved

Reserved.

Byte 6: DID (MSB)]

Most Significant Byte of Device ID

Byte 7: EnableOvercurrentTimer[3:0], DisabledOvercur- rentTimer[3:0]

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 5.8. Default: 8 ms = 0x88.

Byte 8: ActivePorts[3:0], RemovablePorts[3:0]

Bits 7–4 are the ActivePorts[3:0] bits that indicates if the corresponding port is usable. For example, a two-port hub that uses ports 1 and 4 would set this field to 0x09. The total number of ports reported in the Hub Descriptor: bNbrPorts field is calculated from this. Bits 3–0 are the Removable- Ports[3:0] bits that indicates whether the corresponding port is removable (set to high). This bit values are recorded appropriately in the HubDescriptor:DeviceRemovable field. Default: 0xFF.

Byte 9: MaximumPower

This value is reported in the ConfigurationDescriptor:bMax- Power field and is the current in 2-mA intervals that is re- quired from the upstream hub. Default: 0x28 = 80 mA for full-speed and 0x57 = 174 mA for high-speed.

Byte 10: HubControllerPower

This value is reported in the HubDescriptor:bHubContrCur- rent field and is the current in milliamperes required by the hub controller. Default: 0x28 = 80 mA for full-speed and 0x57 = 174 mA for high-speed.

Byte 11: PowerOnTimer

This value is reported in the HubDescriptor: bPwrOn2PwrGood field and is the time in 2-ms intervals from the SetPortPower command until the power on the corresponding downstream port is good. Default: 0x32 = 100 ms.

Byte 12: IllegalHubDescriptor, CompoundDevice, Full- speedOnly, NoPortIndicators, Reserved, GangPowered, SingleTTOnly

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 sys- tems that do not accept this, the IllegalHubDescriptor con- figuration bit may be set to allow CY7C656xx to accept a DescriptorType of 0x00 for this command. Default is 1.

Bit 6: CompoundDevice: Indicates whether the hub is part of a compound device. This is reported in the HubDescrip- tor, wHub-Characteristics: b2. Default set to 0.

Bit 5: Fullspeed: Only configures the hub to be a full-speed only device. Default set to 0.

Bit 4: NoPortIndicators: Turns off the port indicators and does not report them as present in the HubDescriptor, wHubCharacteristics b7 field. Default set to 0.

Bit 3: Reserved. Should be set 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 set to 0.

Bit 1: SingleTTOnly: Indicates that the hub should only sup- port single Transaction Translator mode. This changes var- ious descriptor values. Default set to 0.

Bit 0: Reserved. Default set to 0.

9.3Configured – 0xD4 Load

Byte	Value (MSB->LSB)

0	0xD4

1	VID (LSB)

2	VID (MSB)

3	PID (LSB)

4	PID (MSB)

5	reserved

6	DID (MSB)

Document #: 38-08037 Rev. *D

Page 13 of 23