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M45PE40 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. M45PE40
Description  4 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With Byte-Alterability and a 33 MHz SPI Bus Interface
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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M45PE40 Datasheet(HTML) 4 Page - STMicroelectronics

 
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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® 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
AI04040C
S
VCC
M45PE40
VSS
W
Q
C
D
C
Serial Clock
D
Serial Data Input
Q
Serial Data Output
S
Chip Select
W
Write Protect
Reset
Reset
VCC
Supply Voltage
VSS
Ground
1
AI04041D
2
3
4
8
7
6
5
W
S
VCC
VSS
C
DQ
Reset
M45PE40


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