M45PE20-VMP6G datasheet(5/35 Pages) STMICROELECTRONICS

Part #	M45PE20-VMP6G

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]

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M45PE20

SUMMARY DESCRIPTION

The M45PE20 is a 2Mbit (256K x 8 bit) Serial

Paged Flash Memory accessed by a high speed

SPI-compatible bus.

The memory can be written or programmed 1 to

256 bytes at a time, using the Page Write or Page

Program instruction. The Page Write instruction

consists of an integrated Page Erase cycle fol-

lowed by a Page Program cycle.

The memory is organized as 4 sectors, each con-

taining 256 pages. Each page is 256 bytes wide.

Thus, the whole memory can be viewed as con-

sisting of 1024 pages, or 262,144 bytes.

The memory can be erased a page at a time, using

the Page Erase instruction, or a sector at a time,

using the Sector Erase instruction.

Figure 2. Logic Diagram

Figure 3. SO and VDFPN Connections

Note: 1. There is an exposed die paddle on the underside of the

MLP8 package. This is pulled, internally, to VSS, and

must not be allowed to be connected to any other voltage

or signal line on the PCB.

2. See PACKAGE MECHANICAL section for package di-

mensions, and how to identify pin-1.

Table 1. Signal Names

Reset

AI07400

S

VCC

M45PE20

VSS

W

Q

C

D

1

AI07401

2

3

4

8

7

6

5

W

S

VCC

VSS

C

DQ

Reset

M45PE20

C

Serial Clock

D

Serial Data Input

Q

Serial Data Output

S

Chip Select

W

Write Protect

Reset

VCC

Supply Voltage

VSS

Ground

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Similar Description - M45PE20-VMP6G

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M45PE10	426Kb / 34P	1 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With Byte-Alterability and a 25 MHz SPI Bus Interface
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Numonyx B.V	M45PE10	990Kb / 47P	1-Mbit, page-erasable serial flash memory with byte-alterability and 75 MHz SPI bus interface
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