M25PE20 datasheet(4/37 Pages) STMICROELECTRONICS

4 / 37 page

M25PE10, M25PE20

4/37

SUMMARY DESCRIPTION

The M25PE20 and M25PE10 are 2 Mbit (256K x 8

bit) and 1 Mbit (128K x8 bit) Serial Paged Flash

Memories, respectively. They are accessed by a

high speed SPI-compatible bus.

The memories 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 M25PE20 memory is organized as 4 sectors,

each containing 256 pages. Each page is 256

Bytes wide. Thus, the whole memory can be

viewed as consisting of 1024 pages, or 262,144

Bytes.

The M25PE10 memory is organized as 2 sectors,

each containing 256 pages. Each page is 256

Bytes wide. Thus, the whole memory can be

viewed as consisting of 512 pages, or 131, 072

Bytes.

The memories can be erased a page at a time, us-

ing the Page Erase instruction, or a sector at a

time, using the Sector Erase instruction.

The top sector of the memories can be Write Pro-

tected by Hardware (TSL).

In order to meet environmental requirements, ST

offers these devices in ECOPACK® packages.

ECOPACK® packages are Lead-free and RoHS

compliant.

ECOPACK is an ST trademark. ECOPACK speci-

fications are available at: www.st.com.

Figure 2. Logic Diagram

Table 1. Signal Names

Figure 3. VDFPN AND SO 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.

Reset

AI09713

VCC

M25PE20

M25PE10

VSS

TSL

Serial Clock

Serial Data Input

Serial Data Output

Chip Select

TSL

Top Sector Lock

Reset

VCC

Supply Voltage

VSS

Ground

AI09715

VSS

Reset

SVCC

TSL

M25PE20

M25PE10

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