25LC640-ISN Datasheet, PDF (4/24 Pages) Microchip Technology – 64K SPI Bus Serial EEPROM

25AA640/25LC640
FIGURE 1-1:
HOLD TIMING
CS
SCK
SO
n+2
SI
HOLD
n+2
16 17
16 17
18
19
High-Impedance
n+1
n
n
5
Don’t Care
n+1
n
n
n-1
n-1
FIGURE 1-2:
SERIAL INPUT TIMING
CS
2
Mode 1,1
SCK Mode 0,0
7
8
5
6
SI
MSB In
High-Impedance
SO
FIGURE 1-3:
SERIAL OUTPUT TIMING
CS
SCK
SO
SI
9
10
13
MSB Out
14
Don’t Care
4
12
11
3
LSB In
3
Mode 1,1
Mode 0,0
15
LSB Out
DS21223H-page 4
© 2008 Microchip Technology Inc.