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
VCC
D
C
S
W
HOLD
M25P40
Q
VSS
AI04090
Table 1.
Signal names
Function
Serial Clock
Serial Data input
Serial Data output
Chip Select
Write Protect
Hold
Supply voltage
Ground
Input
Input
Output
Input
Input
Input
Direction
Signal name
C
D
Q
S
W
HOLD
V
CC
V
SS
6/53
NUMONYX [ NUMONYX B.V ]
