Cypress EZ-USB HX2LP, CY7C656xx manual Supported USB Requests, Device Class Commands

PRELIMINARYCY7C656xx

Byte 22: ActivePorts[3:0]

Bits 3–0 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.

Byte 23: RemovablePorts[3:0]

Bits 3–0 are the RemovablePorts[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 24: LangID

Array of LangID codes supported by the hub. Each LangID consists of two bytes, stored LSB first. The array has Num- Langs entries (2 * NumLangs bytes).

Byte a: iManufacturer

Array of addresses for the iManufacturer strings. Each ad- dress is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes). (The starting EE- PROM address is based upon the number entered for NumLangs.

The address a = 24 + 2 * NumLangs.

Byte b: iProduct

Array of addresses for the iProduct strings. Each address is two bytes long, stored LSB first. The array has Num- Langs entries (2 * NumLangs bytes).

The address b = a + 2*NunLangs.

Byte c: iSerialNumber

Array of addresses for the iSerialNumber strings. Each ad- dress is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes).

The address c = b + 2 * NumLangs.

Byte d: iConfiguration(Full-Speed)

Array of addresses for the iConfiguration (full-speed) strings. Each address is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes).

The address d = c + 2*NumLangs.

Byte e: iConfiguration(High-Speed)

Array of addresses for the iConfiguration (high-speed) strings. Each address is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes).

The address e = d + 2 * NumLangs.

Byte f: iInterface(0)

Array of addresses for the iInterface(0) strings. Each ad- dress is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes).

The address f = e + 2 * NumLangs.

Byte g: iInterface(1)

Array of addresses for the iInterface(1) strings. Each ad- dress is two bytes long, stored LSB first. The array has NumLangs entries (2 * NumLangs bytes).

The address g = f + 2 * NumLangs.

Byte h: Strings

Strings addressed by the string pointers. Strings must com- ply with the USB specification. The first byte must be the length of the string in bytes, the second must be 0x03, and the string must be in Unicode.

10.0Supported USB Requests

10.1Device Class Commands

Table 10-1. Device Class Requests

Request	bmRequestType	bRequest	wValue	wIndex	wLength	Data
GetDeviceStatus	10000000B	0x00	0x0000	0x0000	0x0002	2 Byte Device Status
GetInterfaceStatus	10000001B	0x00	0x0000	0x0000	0x0002	2 Byte Endpoint
						Status
GetEndpointStatus	10000010B	0x00	0x0000	0x0000	0x0002	2 Byte Endpoint
						Status
GetDeviceDescriptor	10000000B	0x06	0x0001	Zero or	Descriptor	Descriptor
				Language ID	Length
GetConfigDescriptor	10000000B	0x06	0x0002	Zero or	Descriptor	Descriptor
				Language ID	Length
GetDeviceQualifierDe-	10000000B	0x06	0x0006	Zero or	Descriptor	Descriptor
scriptor				Language ID	Length
GetOtherSpeedConfigura-	10000000B	0x06	0x0007	Zero or	Descriptor	Descriptor
tionDescriptor				Language ID	Length
GetConfiguration[12]	10000000B	0x08	0x0000	0x0000	0x0001	Configuration value
SetCongfiguration[12]	00000000B	0x09	Configuration	0x0000	0x0000	None
			Value
GetInterface	10000001B	0xA	0x0000	0x0000	0x0001	Interface Number
Note:
12. Only one configuration is supported in CY7C656xx.
Document #: 38-08037 Rev. *D						Page 16 of 23