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M45PE40-VMW6TP Datasheet

  • M45PE40-VMW6TP

  • 4 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With ...

  • 538.70KB

  • 35页

  • STMICROELECTRONICS   STMICROELECTRONICS

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M45PE40
SUMMARY DESCRIPTION
The M45PE40 is a 4Mbit (512K 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 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 524288 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.
In order to meet environmental requirements, ST
offers these devices in ECOPACK庐 packages.
ECOPACK庐 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
VCC
Table 1. Signal Names
C
D
Q
Serial Clock
Serial Data Input
Serial Data Output
Chip Select
Write Protect
Reset
Supply Voltage
Ground
S
W
Reset
V
CC
V
SS
Figure 3. VDFPN and SO Connections
M45PE40
D
C
Reset
S
1
2
3
4
8
7
6
5
AI04041D
Q
VSS
VCC
W
D
C
S
W
Reset
M45PE40
Q
Note: 1. There is an exposed die paddle on the underside of the
MLP8 package. This is pulled, internally, to V
SS
, 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.
VSS
AI04040C
4/35

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