M25P40 Numonyx, B.V., M25P40 Datasheet - Page 6

• Manufacturer Part Number: M25P40
• Description: 4 Mbit, low voltage, serial Flash memory with 50 MHz SPI bus interface
• Manufacturer: Numonyx, B.V.

Description
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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.
Table 1.
C
D
Q
S
W
HOLD
V
V
CC
SS
Signal name
Logic diagram
Signal names
Serial Clock
Serial Data input
Serial Data output
Chip Select
Write Protect
Hold
Supply voltage
Ground
HOLD
W
D
C
S
V CC
V SS
Function
M25P40
Q
AI04090
Input
Input
Output
Input
Input
Input
Direction
M25P40