CY7C65640-LFC Cypress Semiconductor Corp, CY7C65640-LFC Datasheet - Page 16

• Manufacturer Part Number: CY7C65640-LFC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C65640-LFC

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Not Compliant

8.0
Systems using TetraHub must have an external EEPROM in order for the device to have a unique VID, PID, and DID. The
TetraHub can talk to SPI EEPROM that are double byte addressable only. TetraHub uses the command format from the '040
parts. The TetraHub cannot talk to ‘080 EEPROM parts, as the read command format used for talking to ‘080 is not the same as
‘040. The '010s and '020s uses the same command format as used to interface with the ‘040 and hence these can also be used
to interface with the TetraHub.
8.1
When used in default mode, only a unique VID, PID, and DID must be present in the external SPI EEPROM. The contents of the
EEPROM must contain this information in the following format:
8.2
Byte 0: 0xD2
Byte 1: VID (LSB)
Byte 2: VID (MSB)
Byte 3: PID (LSB)
Byte 4: PID (MSB)]
Document #: 38-08019 Rev. *E
Byte
10
12
11
0
1
2
3
4
5
6
7
8
9
Needs to be programmed with 0xD2
Least Significant Byte of Vendor ID
Most Significant Byte of Vendor ID
Least Significant Byte of Product ID
Most Significant Byte of Product ID
Byte
0xD2
VID (LSB)
VID (MSB)
PID (LSB)
PID (MSB)
DID (LSB)
DID (MSB)
EnableOverCurrentTimer[3:0], DisableOvercurrent-
Timer[3:0]
ActivePorts[3:0], RemovablePorts[3:0]
MaxPower
HubControllerPower
PowerOnTimer
IllegalHubDescriptor, CompoundDevice,
FullspeedOnly, NoPortIndicators, Reserved,
GangPowered, SingleTTOnly, NoEOPatEOF1
Default – 0xD0 Load
Configured – 0xD2 Load
Configuration Options
0
1
2
3
4
5
6
Value (MSB->LSB)
DID (MSB)
VID (MSB)
PID (MSB)
DID (LSB)
VID (LSB)
PID (LSB)
Value
0xD0
CY7C65640
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