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STMicroelectronics Electronic Components Datasheet

M25PE40 Datasheet

Page-Erasable Serial Flash memory

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M25PE40
4 Mbit, low voltage, Page-Erasable Serial Flash memory with
byte alterability, 50 MHz SPI bus, standard pinout
Features
SPI bus compatible serial interface
4 Mbit Page-Erasable Flash memory
Page size: 256 bytes
– Page Write in 11 ms (typical)
– Page Program in 0.8 ms (typical)
– Page Erase in 10 ms (typical)
SubSector Erase (4 Kbytes)
Sector Erase (64 Kbytes)
Bulk Erase (4 Mbits)
2.7 V to 3.6 V single supply voltage
50 MHz clock rate (maximum)
Deep Power-down mode 1 µA (typical)
Electronic Signature
– JEDEC standard two-byte signature
(8013h)
Software Write Protection on a 64 Kbyte sector
basis
Hardware Write Protection of the memory area
selected using the BP0, BP1 and BP2 bits
More than 100 000 Write cycles
More than 20 year data retention
Packages
– ECOPACK® (RoHS compliant)
VFQFPN8 (MP)
6 × 5 mm (MLP8)
SO8W (MW) 208 mils width
SO8N (MN) 150 mils width
January 2007
Rev 7
1/59
www.st.com
1


STMicroelectronics Electronic Components Datasheet

M25PE40 Datasheet

Page-Erasable Serial Flash memory

No Preview Available !

Contents
Contents
M25PE40
1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Important note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Serial Data Output (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Serial Data Input (D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Serial Clock (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Chip Select (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Reset (Reset) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 Write Protect (W) or Top Sector Lock (TSL) . . . . . . . . . . . . . . . . . . . . . . . . 9
2.7 VCC supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.8 VSS ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 SPI modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Operating features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Sharing the overhead of modifying data . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 An easy way to modify data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 A fast way to modify data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Polling during a Write, Program or Erase cycle . . . . . . . . . . . . . . . . . . . . 13
4.5 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.6 Active Power, Standby Power and Deep Power-down modes . . . . . . . . . 13
4.7 Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.8 Protection modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.8.1 Protocol-related protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.8.2 Specific Hardware and Software protections . . . . . . . . . . . . . . . . . . . . . 15
5 Memory organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2 Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.3 Read Identification (RDID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/60


Part Number M25PE40
Description Page-Erasable Serial Flash memory
Maker ST Microelectronics
Total Page 30 Pages
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