25C040-/P Microchip Technology, Inc., 25C040-/P Datasheet - Page 8

• Manufacturer Part Number: 25C040-/P
• Description: The 25AA040 is a 4K Bit Serial Electrically Erasable Prom With Memory Accessed Via a Simple Serial Peripheral Interface (SPI™) Compatible Serial Bus
• Manufacturer: Microchip Technology, Inc.

25AA040/25LC040/25C040
FIGURE 3-1:
FIGURE 3-2:
FIGURE 3-3:
DS21204C-page 8
SCK
CS
SO
SCK
SCK
SCK
SI
CS
CS
CS
SO
SI
SI
SI
0
0
0
0
0
0
0
1
7
0
25
1
0
READ SEQUENCE
1
BYTE WRITE SEQUENCE
PAGE WRITE SEQUENCE
0
0
26
6
2
instruction
instruction
2
0
2
instruction
0
27 28 29 30 31 32
5
0
3
3
data byte 2
0
3
A8
A8
4
4
4
A8
4
0
3
0
5
5
0
5
1
2
1
6
high impedance
6
1
6
0
1
0
7
7
1
7
A7 6
A7
0
8
8
A7
8
7
33
6
9 10 11
9 10 11 12 13 14 15 16 17 18 19 20 21 22
lower address byte
lower address byte
6
high impedance
9 10 11 12 13 14 15 16 17 18 19 20 21 22
5
6
34 35 36
lower address byte
5
5
4
5
4
data byte 3
4
13
3
4
3
3
14 15 16 17 18 19 20 21 22 23 24
3
37 38
2
2
2
2
1
1
1
1
39 40
0
A0 7
A0
0
7
7
6
6
6
7
5
data byte 1
5
5
4
6
data byte
data byte n (16 max)
don’t care
4
data out
4
5
2001 Microchip Technology Inc.
3
3
4
3
2
2
1
3
2
1
2
0
1
23
0
1
0
23
T
0
WC