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Table 1 Comparison between NOR and NAND Flash memories[5557]

From: Overview of emerging nonvolatile memory technologies

Features NOR NAND
Memory size ≤512 Mbit 1 to 8 Gbit
Sector size Approximately 1 Mbit Approximately 1 Mbit
Program time 9 μs/word 400 μs/page
Erase time 1 s/sector 1 ms/sector
Read access time <80 ns 20 μs
Write parallelism 8 to 16 words 2 Kbyte
Output parallelism Byte/word/dword Byte/word
Read parallelism 8 to 16 words 2 Kbyte
Access method Random Sequential
Price High Very low
Reliability Standard Low