xc3s1400an Xilinx Corp., xc3s1400an Datasheet - Page 21

• Manufacturer Part Number: xc3s1400an
• Description: Spartan-3an Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

Device DNA Read Endurance
Table 15: Device DNA Identifier Memory Characteristics
In-System Flash Memory Data Retention, Program/Write Endurance
Table 16: In-System Flash (ISF) Memory Characteristics
DS557-3 (v3.1) June 2, 2008
Product Specification
ISF_PAGE_REWRITE Number of cumulative random (non-sequential) page erase/program operations
ISF_PAGE_CYCLES
ISF_SPR_CYCLES
ISF_SEC_CYCLES
ISF_RETENTION
DNA_CYCLES
ISF_ACTIVE
Symbol
Symbol
R
Number of READ operations or JTAG ISC_DNA read operations. Unaffected by
HOLD or SHIFT operations
Data retention
Time that the ISF memory is selected and active. SPI_ACCESS design primitive
pins CSB = Low, CLK toggling
Number of program/erase cycles, per ISF memory page
within a sector before pages must be rewritten
Number of program/erase cycles for Sector Protection Register
Number of program cycles for Sector Lockdown Register per sector,
user-programmable field in Security Register, and Power-of-2 Page Size
Description
Description
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DC and Switching Characteristics
30,000,000
Maximum
Maximum
100,000
10,000
10,000
20
2
1
Cycles
Cycles
Cycles
cycles
Units
Units
Cycle
Read
Years
Years
21