MCF51QH128 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MCF51QH128' PDF : 68 Pages View PDF
Memories and memory interfaces
While different partitions of the FlexNVM are available, the intention is that a single
choice for the FlexNVM partition code and EEPROM data set size is used throughout the
entire lifetime of a given application. The EEPROM endurance equation and graph
shown below assume that only one configuration is ever used.
Writes_FlexRAM =
EEPROM – 2 × EEESIZE
EEESIZE
× Write_efficiency × nnvmcycd
where
• Writes_FlexRAM — minimum number of writes to each FlexRAM location
• EEPROM — allocated FlexNVM based on DEPART; entered with Program
Partition command
• EEESIZE — allocated FlexRAM based on DEPART; entered with Program Partition
command
• Write_efficiency —
• 0.25 for 8-bit writes to FlexRAM
• 0.50 for 16-bit or 32-bit writes to FlexRAM
• nnvmcycd — data flash cycling endurance
MCF51QH128 Advance Information Data Sheet, Rev. 0, 05/2011.
30
Preliminary
Freescale Semiconductor, Inc.
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