CY7C68310
Document 38-08030 Rev. *H
Page 14 of 34
Table 6-2. EEPROM Organization
I2C
Address
Field Name
Field Description
Required
I2C Data
Example
I2C Data
CY7C68310 Configuration Data
0x00
I2C memory device Signature
(LSB)
LSB I2C memory device Signature byte.
0x4B
0x01
I2C memory device Signature
(MSB)
MSB I2C memory device Signature byte.
0x50
0x02
Event Notification
Bits (7:0)
ATAPI event notification command. The value of this register
(if other than 0x00) is used to identify the vendor-specific
Event Notification command (see Section 5.2.3). Setting this
field to 0x00 disables this feature.
0x00
0x03
APM Value
Bits (7:0)
ATA device Automatic Power Management value. If an
attached ATA device supports APM and this field contains
other than 0x00, the CY7C68310 will issue a SET
FEATURES command to enable APM with this register
value during the drive initialization.
0x00
0x04
ATA Initialization Timeout
Time in 128-millisecond granularity before the CY7C68310
stops polling the ALT STAT register for reset complete and
restarts the reset process (0x80 = 16.4 seconds).
0x80
0x05
USB Bus Mode
Bit (7) – Read only
0x00
USB bus mode of operation.
‘0’ = USB is operating in full-speed mode (12 Mbit/sec)
‘1’ = USB is operating in high-speed mode (480 Mbit/sec)
ATAPI Command Block Size
Bit (6)
CBW Command Block Size.
‘0’ = 12 byte ATAPI CB
‘1’ = 16 byte ATAPI CB
Master/Slave Selection
Bit (5)
Device number selection. This bit is valid only when “Skip
ATA/ATAPI Device Initialization” is active. Otherwise, the
value of this bit is ignored.
‘0’ = Drive 0 (master)
‘1’ = Drive 1 (slave)
ATAPI Reset
Bit (4)
ATAPI reset during drive initialization.
Setting this bit causes the CY7C68310 to issue an ATAPI
reset during device initialization.
ATA_NATAPI
Bit (3) – Read only.
Indicates if an ATA or ATAPI device is detected.
‘0’ = ATAPI device
‘1’ = ATA device or possible device initialization failure
Force USB FS
Bit(2)
Force USB full-speed only operation.
Setting this bit prevents the CY7C68310 from negotiating
HS operation during USB reset events.
‘0’ = Normal operation – allow HS negotiation during USB
reset
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