CY7C68300B/CY7C68301B
CY7C68320/CY7C68321
Table 8-6. EEPROM Organization (continued)
EEPROM
Address
Required Suggested
Contents Contents
Field Name
Field Description
Fixed number of logical
units = 1
Bit (1)
If bits 1 and 2 are both 0, the number of logical units will be
determined by searching the ATA and CF buses for devices.
Search ATA on VBUS
removed
Bit (0)
Search for ATA devices when VBUS returns. If this bit is set,
the ATA bus will be searched for ATA devices every time
AT2LP is plugged into a computer.
0x0F
Reserved
Must be set to 0x00.
0x00
Device Descriptor
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
bLength
Length of device descriptor in bytes.
Descriptor type.
0x12
0x01
0x00
0x02
0x00
0x00
0x00
0x40
bDescriptor Type
bcdUSB (LSB)
bcdUSB (MSB)
bDeviceClass
USB Specification release number in BCD.
Device class.
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
idVendor (LSB)
idVendor (MSB)
idProduct (LSB)
idProduct (MSB)
bcdDevice (LSB)
Device subclass.
Device protocol.
USB packet size supported for default pipe.
Vendor ID. Cypress’s Vendor ID may only be used for evalu-
ation purposes, and not in released products.
Your
Vendor ID
Product ID.
Your
Product ID
Device release number in BCD LSB (product release
number).
Your
release
number
0x1D
0x1E
bcdDevice (MSB)
iManufacturer
Device release number in BCD MSB (silicon release
number).
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
0x69
0x75
0x1F
0x20
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.
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.
0x21
bNumConfigurations
Number of configurations supported.
0x03
1 for mass storage: 2 for HID: 3 for CSM
Device Qualifier
0x22
0x23
0x24
0x25
0x26
0x27
0x28
0x29
0x2A
bLength
Length of device descriptor in bytes.
Type Descriptor type.
0x0A
0x06
0x00
0x02
0x00
0x00
0x00
0x40
0x01
bDescriptor
bcdUSB (LSB)
bcdUSB (MSB)
bDeviceClass
USB Specification release number in BCD.
USB Specification release number in BCD.
Device class.
bDeviceSubClass
bDeviceProtocol
bMaxPacketSize0
bNumConfigurations
Device subclass.
Device protocol.
USB packet size supported for default pipe.
Number of configurations supported.
Document 38-08033 Rev. *D
Page 22 of 36
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