M25P40 datasheet(5/40 Pages) STMICROELECTRONICS

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M25P40

SUMMARY DESCRIPTION

The M25P40 is a 4 Mbit (512K x 8) Serial Flash

Memory, with advanced write protection mecha-

nisms, 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 con-

taining 256 pages. Each page is 256 bytes wide.

Thus, the whole memory can be viewed as con-

sisting 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.

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

AI04090

VCC

M25P40

HOLD

VSS

AI04091B

VSS

HOLD

SVCC

M25P40

Serial Clock

Serial Data Input

Serial Data Output

Chip Select

Write Protect

HOLD

Hold

VCC

Supply Voltage

VSS

Ground

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