25C640 Microchip Technology, Inc., 25C640 Datasheet - Page 5

• Manufacturer Part Number: 25C640
• Description: The 25AA640 is a 64K-bit Serial Electrically Erasable Prom With Memory Accessed Via a Simple Serial Peripheral Interface (SPI™) Compatible Serial Bus
• Manufacturer: Microchip Technology, Inc.

FIGURE 1-1:
FIGURE 1-2:
FIGURE 1-3:
2001 Microchip Technology Inc.
SCK
CS
SO
SI
SCK
HOLD
SI
SO
CS
SCK
SO
CS
SI
Mode 1,1
Mode 0,0
5
2
n+2
n+2
MSB In
MSB Out
HOLD TIMING
SERIAL INPUT TIMING
SERIAL OUTPUT TIMING
9
13
10
6
n+1
n+1
High Impedance
16
Don’t Care
n
17
18
7
n
High Impedance
Don’t Care
14
8
25AA640/25LC640
16
19
3
LSB In
17
5
n
n
LSB Out
11
15
4
3
n-1
12
DS21223E-page 5
n-1
Mode 1,1
Mode 0,0