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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

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