M45PE20-VMP6P datasheet(10/35 Pages) STMICROELECTRONICS

Part #	M45PE20-VMP6P

Description	2 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With Byte-Alterability and a 25 MHz SPI Bus Interface

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 35 page

M45PE20

10/35

MEMORY ORGANIZATION

The memory is organized as:

■

1024 pages (256 bytes each).

■

262,144 bytes (8 bits each)

■

4 sectors (512 Kbits, 65536 bytes each)

Each page can be individually:

–

programmed (bits are programmed from 1 to

0)

–

erased (bits are erased from 0 to 1)

–

written (bits are changed to either 0 or 1)

The device is Page or Sector Erasable (bits are

erased from 0 to 1).

Table 3. Memory Organization

Figure 6. Block Diagram

Sector

Address Range

3

30000h

3FFFFh

2

20000h

2FFFFh

1

10000h

1FFFFh

0

00000h

0FFFFh

AI07402

S

W

Control Logic

High Voltage

Generator

I/O Shift Register

Address Register

and Counter

256 Byte

Data Buffer

256 Bytes (Page Size)

X Decoder

C

D

Q

Status

Register

00000h

3FFFFh

000FFh

Reset

10000h

First 256 Pages can

be made read-only

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Manufacturer	Part #	Datasheet	Description
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M45PE20-VMP6P Datasheet(PDF) 10 Page - STMicroelectronics

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