CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Document 001-05809 Rev. *B Page 26 of 42
Search ATA on VBUS Bit 0
Search for ATA devices when VBUS returns. If this bit is set,
the ATA bus is searched for ATA devices every time
VBUS_ATA_ENABLE is asserted. This feature enables the
AT2LP to be used in designs where the drive may be physi-
cally removed (such as docking stations or port replicators).
0 = Search ATA bus on VBUS_ATA_ENABLE assertion
1 = No ATA bus search on VBUS_ATA_ENABLE assertion
0x0F Reserved Must be set to 0x00 0x00
Device Descriptor
0x10 bLength Length of device descriptor in bytes 0x12
0x11 bDescriptor Type Descriptor type. 0x01
0x12 bcdUSB (LSB) USB Specification release number in BCD 0x00
0x13 bcdUSB (MSB) 0x02
0x14 bDeviceClass Device class 0x00
0x15 bDeviceSubClass Device subclass 0x00
0x16 bDeviceProtocol Device protocol 0x00
0x17 bMaxPacketSize0 USB packet size supported for default pipe 0x40
0x18 idVendor (LSB) Vendor ID. Cypress’ Vendor ID may only be used for evalu-
ation purposes, and not in released products.
Your
Vendor ID
0x19 idVendor (MSB)
0x1A idProduct (LSB) Product ID Your
Product ID
0x1B idProduct (MSB)
0x1C bcdDevice (LSB) Device release number in BCD LSB (product release
number)
Your
release
number
0x1D bcdDevice (MSB) Device release number in BCD MSB (silicon release
number)
0x1E iManufacturer Index to manufacturer string. This entry must equal half of
the address value where the string starts or 0x00 if the string
does not exist.
0x53
0x1F iProduct Index to product string. This entry must equal half of the
address value where the string starts or 0x00 if the string
does not exist.
0x69
0x20 iSerialNumber Index to serial number string. This entry must equal half of
the address value where the string starts or 0x00 if the string
does not exist. The USB Mass Storage Class Bulk-Only
Transport Specification requires a unique serial number (in
upper case, hexadecimal characters) for each device.
0x75
0x21 bNumConfigurations Number of configurations supported
1 for mass storage: 2 for HID: 3 for CSM
0x03
Device Qualifier
0x22 bLength Length of device descriptor in bytes 0x0A
0x23 bDescriptor Type Descriptor type 0x06
0x24 bcdUSB (LSB) USB Specification release number in BCD 0x00
0x25 bcdUSB (MSB) USB Specification release number in BCD 0x02
0x26 bDeviceClass Device class 0x00
0x27 bDeviceSubClass Device subclass 0x00
0x28 bDeviceProtocol Device protocol 0x00
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
Configuration
Item Description
Required
Contents
Variable
Contents
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