M25P40 Numonyx, B.V., M25P40 Datasheet - Page 34

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

Instructions
Figure 18. Release from Deep Power-down and Read Electronic Signature (RES) instruction
1. The value of the 8-bit Electronic Signature, for the M25P40, is 12h.
Figure 19. Release from Deep Power-down (RES) instruction sequence
34/53
S
C
D
Q
S
C
D
Q
sequence and data-out sequence
0
1
High Impedance
2
Instruction
3
4
High Impedance
0
5
1
6
2
Instruction
7
3
MSB
23
8
4
22 21
9 10
5
3 Dummy Bytes
6
7
3
28 29 30 31 32 33 34 35
2
1
Deep Power-down Mode
0
MSB
7
Electronic Signature Out
Deep Power-down Mode
t
RES1
6
5
4
3
36 37 38
2
Stand-by Mode
1
0
t
RES2
AI04078B
Stand-by Mode
AI04047C
M25P40