CY7C68300C CYPRESS [Cypress Semiconductor], CY7C68300C Datasheet - Page 18

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

Document 001-05809 Rev. *A
Operating Modes
The different modes of operation and EEPROM information
are presented in the following sections.
Operational Mode Selection Flow
During the power-up sequence, the AT2LP queries the I
for an EEPROM. The AT2LP then selects a pinout configu-
ration as shown below, and checks to see if ARESET# is
configured for Board Manufacturing Test Mode.
• If no EEPROM is detected, the AT2LP uses the values in
the factory-programmable (fused) memory space. See
“Fused Memory Data” on page 19
for more information. This
Figure 10. Operational Mode Selection Flow
EZ-USB AT2LP
Yes
Signature
0x534B?
Pinout
Set
Board Manufacturing
VBUS_ATA_ENABLE
DD7 Pin Set
Yes
Yes
Pin HIGH?
Pin HIGH?
Yes
ARESET#
Pin LOW?
ARESET#
Test Mode
HIGH
2
C bus
No
(CY7C68300A)
Check I
EZ-USB AT2+
Yes
Yes
Signature
0x4D4D?
EEPROM
Found?
Pinout
Set
2
C Bus
• If an EEPROM signature of 0x4D4D is found, the
• If an EEPROM signature of 0x534B is found, the AT2LP
• If an EEPROM is detected, but an invalid signature is read,
is not a valid mode of operation if no factory programming
has been done.
CY7C68300C/CY7C68301C uses the same pinout and
EEPROM format as the CY7C68300A (EZ-USB AT2+).
uses the values stored in the EEPROM to configure the USB
descriptors for normal operation.
the AT2LP defaults into Board Manufacturing Test Mode.
No
No
No
No
Storage Mode
Normal Mass
(AT2LP Pinout)
Memory Data
CY7C68300C/CY7C68301C
CY7C68320C/CY7C68321C
Load Fused
Page 18 of 42
[+] Feedback
[+] Feedback