CY7C68320C-100AXC Cypress Semiconductor Corp, CY7C68320C-100AXC Datasheet - Page 18

• Manufacturer Part Number: CY7C68320C-100AXC
• Description: IC USB 2.0 BRIDGE AT2LP 100LQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB AT2LP™r
• Type: USB to ATA Bridger

Specifications of CY7C68320C-100AXC

• Package / Case: 100-LQFP
• Controller Type: USB 2.0 Controller
• Interface: I²C
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 50mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Operating Supply Voltage: 3.3 V
• Supply Current: 50 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: CY4615B - KIT USB TO ATA REFERENCE DESIGN
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 428-2267; CY7C68320C-100AXC

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
shown here, and checks to see if ARESET# is configured for Board Manufacturing Test Mode.
■
■
■
■
Document 001-05809 Rev. *B
If no EEPROM is detected, the AT2LP uses the values in the factory-programmable (fused) memory space. See
Data”
If an EEPROM signature of 0x4D4D is found, the CY7C68300C/CY7C68301C uses the same pinout and EEPROM format as the
CY7C68300A (EZ-USB AT2+).
If an EEPROM signature of 0x534B is found, the AT2LP uses the values stored in the EEPROM to configure the USB descriptors
for normal operation.
If an EEPROM is detected, but an invalid signature is read, the AT2LP defaults into Board Manufacturing Test Mode.
on page 19 for more information. This is not a valid mode of operation if no factory programming has been done.
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
2
HIGH
C bus for an EEPROM. The AT2LP then selects a pinout configuration as
No
(CY7C68300A)
Check I
EZ-USB AT2+
Yes
Yes
Signature
EEPROM
0x4D4D?
Found?
Pinout
Set
2
C Bus
No
No
No
No
Storage Mode
Normal Mass
(AT2LP Pinout)
Memory Data
Load Fused
CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
“Fused Memory
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