Description
M25P40
1
Description
The M25P40 is a 4 Mbit (512 K × 8) Serial Flash memory, with advanced write protection
mechanisms, 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 containing 256 pages. Each page is 256 bytes
wide. Thus, the whole memory can be viewed as consisting 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.
In order to meet environmental requirements, Numonyx offers the M25P40 in ECOPACK®
packages. ECOPACK® packages are Lead-free and RoHS compliant.
Figure 1.
Logic diagram
V
CC
D
C
S
Q
M25P40
W
HOLD
V
SS
AI04090
Table 1.
Signal names
Signal name
Function
Direction
C
Serial Clock
Input
D
Serial Data input
Input
Output
Input
Input
Input
Q
Serial Data output
Chip Select
Write Protect
Hold
S
W
HOLD
VCC
VSS
Supply voltage
Ground
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NUMONYX [ NUMONYX B.V ]
