CY7C68300C CYPRESS [Cypress Semiconductor], CY7C68300C Datasheet - Page 25

• Manufacturer Part Number: CY7C68300C
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document 001-05809 Rev. *A
Table 11.Configuration Data Organization (continued)
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
Device Descriptor
0x10
0x11
Address
Byte
Reserved
GPIO Output Pin State
LUN0 Identify String
LUN1 Identify String
Delay After Reset
Reserved
Bus-Powered Flag
CF UDMA Enable
Fixed Number of Logical
Search ATA on VBUS
Reserved
bLength
bDescriptor Type
Configuration
Item Name
Bits 7:6
Reserved. Must be set to zero.
Bits 5:0
These bits select the value driven on the GPIO pins that are
configured as outputs in configuration address 0x09.
0 = Drive the GPIO pin LOW
1 = Drive the GPIO pin HIGH
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the
LUN0 device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
This byte is a pointer to the start of a 24 byte ASCII
(non-Unicode) string in the EEPROM that is used as the
LUN1 device identifier. This string is used by many operating
systems as the user-visible name for the drive. If this byte is
0x00, the Identify Device data from the drive is used instead.
Number of 20-ms ticks to wait between AT2LP startup or
reset, and the first attempt to access any drives.
Bits 7:5
Must be set to zero.
Bit 4
Enable bus-powered HDD support. This bit enables the use
of DRVPWRVLD features without reporting the LUN0 device
as removable media.
0 = LUN0 is removable media or DRVPWRVLD is disabled
1 = LUN0 device is bus-powered and non-removable
Bit 3
Enable UDMA transfers for removable devices. Some CF
devices interfere with UDMA transfers when more than one
drive is connected to the ATA bus.
0 = Do not use UDMA transfers with removable devices
(UDMA signals are not connected to the CF pins).
1 = Allow UDMA transfers to be used with removable
devices (UDMA signals are connected to the CF pins).
Bits 2:1
Assume the presence of devices and do not perform a
search of the ATA bus to discover the number of LUNs.
00 = Search ATA bus and determine number of LUNs
01 = Assume only LUN0 present; no ATA bus search
10 = Assume LUN0 and LUN1 present; no ATA bus search
11 = Assume LUN0 and LUN1 present; no ATA bus search
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 allows the
AT2LP to be used in designs where the drive may be physi-
cally removed (like docking stations or port replicators).
0 = Search ATA bus on VBUS_ATA_ENABLE assertion
1 = No ATA bus search on VBUS_ATA_ENABLE assertion
Must be set to 0x00
Length of device descriptor in bytes
Descriptor type.
Item Description
Configuration
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Required
Contents
0x00
0x12
0x01
Page 25 of 42
Contents
Variable
0x00
0x00
0x00
0x00
0x00
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