NM29A040 datasheet(10/14 Pages) NSC

部品番号	NM29A040

部品情報	4-Mbit/8-Mbit CMOS Serial FLASH E2PROM

PDF	14 Pages

Scroll/Zoom	100%

メーカー	NSC [National Semiconductor (TI)]

ホームページ	http://www.national.com

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Number of Valid Blocks

The NM29A040080 may contain unusable blocks These

unusable blocks should not be used to store data Notifica-

tion (5) describes how to identify unusable blocks

Symbol

Parameter

Min

Typ

Max

Units

NVB4

4-Mbit Number of Valid Blocks(1)

117

TBD

127(2)

Block

NVB8

8-Mbit Number of Valid Blocks(1)

234

TBD

254(2)

Block

Note 1

A valid block is a block having all 4096 bytes usable An unusable block is a block in which

a minimum of one bit is unusable

Note 2

Not including Block 127 (4-Mbit) or 254 (8-Mbit)

Timing Diagrams

Synchronous Data Timing

TLD12475 – 16

Get Status Timing

TLD12475 – 17

Note

To avoid putting the device in an unknown state DI should be held low when not clocking in datacommands

Set Address Timing

TLD12475 – 18

Note

CS can be pulled high during tSADD tR tPROG and tBERASE However DO will only reflect the status (readybusy) while CS is low

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