M25P40 查看數據表（PDF） - Unspecified

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M25P40

4 Mbit, low voltage, serial Flash memory with 50 MHz SPI bus interface

Unspecified 

Description

1

Description

M25P40

The M25P40 is a 4 Mbit (512 K × 8) Serial Flash memory, with advanced write protection

mechanisms, accessed by a high speed SPI-compatible bus.

The memory can be programmed 1 to 256 bytes at a time, using the Page Program

instruction.

The memory is organized as 8 sectors, each containing 256 pages. Each page is 256 bytes

wide. Thus, the whole memory can be viewed as consisting of 2048 pages, or 524,288

bytes.

The whole memory can be erased using the Bulk Erase instruction, or a sector at a time,

using the Sector Erase instruction.

In order to meet environmental requirements, Numonyx offers the M25P40 in ECOPACK®

packages. ECOPACK® packages are Lead-free and RoHS compliant.

Figure 1. Logic diagram

VCC

D

C

S

W

HOLD

Q

M25P40

VSS

Table 1. Signal names

Signal name

Function

C

Serial Clock

D

Serial Data input

Q

Serial Data output

S

W

HOLD

VCC

VSS

Chip Select

Write Protect

Hold

Supply voltage

Ground

AI04090

Direction

Input

Input

Output

Input

Input

Input

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