It is clearly marked in the MCF52259 data sheet:
2.4 Flash Memory Characteristics
The flash memory characteristics are shown in Table 9 and Table 10.
Table 10. SGFM Flash Module Life Characteristics
Maximum number of guaranteed program/erase cycles1 before failure P/E 10,000 Cycles
Data retention at average operating temperature of 85°C Retention 10 Years
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I vaguely remember an errata item for a Freescale product stating the cycle limit for "large blocks" was something like 100(!), but the small blocks could be rewritten a lot more times. Can anyone remember which part this was?
Tom