LFXP2-5E-5FTN256I Lattice, LFXP2-5E-5FTN256I Datasheet - Page 306

• Manufacturer Part Number: LFXP2-5E-5FTN256I
• Description: FPGA - Field Programmable Gate Array 5K LUTs 172 I/O Inst on DSP 1.2V -5 Spd
• Manufacturer: Lattice

Specifications of LFXP2-5E-5FTN256I

• Number Of Macrocells: 5000
• Number Of Programmable I/os: 172
• Data Ram Size: 169984
• Supply Voltage (max): 1.26 V
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (min): 1.14 V
• Package / Case: FTBGA-256
• Number Of Logic Elements/cells: *
• Number Of Labs/clbs: *
• Total Ram Bits: 169984
• Number Of I /o: 172
• Number Of Gates: -
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: *
• Operating Temperature: -40°C ~ 100°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
Flash Protect
Figure 15-10. Flash Protect
The next highest level of security for the LatticeXP2 is the 64-bit Flash Protect feature. The 64-bit Flash protect key
is used to protect the embedded configuration flash from accidental or unauthorized erasure or reprogramming.
This feature does not prevent the device from read back. Therefore, user is given the option to turn ON the
CONFIG_SECURE feature.
The default 64-bit Flash protect key is “_LATTICE”. Users can also enter their own 64-bit Flash protect key. If there
is an existing 64-bit Flash protect key in the Flash Protect key file, the 64-bit Flash protect key can be imported for
the Flash Protect key file (<Project_Name>.key). The ispVM GUI will display the Flash Protect key in the same for-
mat selected when the 64-bit Flash Protect key was created. Users have the option to change the 64-bit Flash pro-
tect key using the default by clicking on the Default Key button.
The ispVM software will automatically check the LatticeXP2 device to see if the Flash Protect feature is enabled. If
it is, ispVM software will prompt the user to enter the 64-bit Flash Protect key before performing an erase or pro-
gramming operation. If the 64-bit Flash Protect programmed in the device matches the 64-bit Flash Protect key
entered in the ispVM GUI, the device can be erased and reprogrammed. If the keys are lost, the programmed
device will be an OTP device. The re-programming of the device requires the user to enter the 64-bit Flash Protect
key programmed into the device first. If it matches the 64-bit key (stored in the device), the device will enter the pro-
gramming mode for erasure and re-programming of the Flash as well as the SRAM fuses.
Note: The Flash Protect key cannot be the same as the Encryption Key. The Flash Protect key is 64 bits and the
encryption key is 128 bits.
Changing Flash Protect
If the user decides to change the key, it can be done in the key field. The newly created Flash Protect key file
(<Project_Name>.key) contains the new 64-bit Flash Protect key and is now ready to be programmed into a device.
The user can also revert back to using the default password by clicking on the Default button next to the Flash Pro-
tect Key. The default password is “_LATTICE”.
Key Input for
Programming
Capture for Fuse
Pattern Verify.
Disabled when
Key Lock Fuse.
TDI
Flash Enable
Fuses
64-Bit Key Shift Register
Flash Program Enable
15-7
Encryption and Security Usage Guide
Update for
Fuse Pattern
Programming
TDO
LatticeXP2 Configuration
Output for
Fuse Pattern
Verification