FM25V20 – 2Mb SPI F-RAM
S
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
4
5
6
7
0
1
2
3
4
5
6
7
C
D
op-code
18-bit Address
Data
A3 A2 A1 A0
LSB MSB
0
0
0
0
0
0
A17 A16
7
6
5
4
3
2
1
0
0
0
0
0
0
0
1
0
MSB
LSB
Q
Figure 9. Memory Write with 3-Byte Address
S
0
1
2
3
4
5
6
7
0
1
2
3
4
6
7
4
5
6
7
0
1
2
3
4
5
6
7
5
C
D
18-bit Address
op-code
A17 A16
A3 A2 A1 A0
LSB
0
0
0
0
0
0
0
0
0
0
0
0
1
1
MSB
Data
MSB
7
LSB
0
Q
6
5
4
3
2
1
Figure 10. Memory Read with 3-Byte Address
S
0
1
2
3
4
5
6
7
0
1
2
3
6
7
4
5
6
7
0
1
2
3
4
5
6
7
5
C
D
Dummy byte
op-code
18-bit Address
0
0
0
0
A2 A1 A0
X
X
X
X
0
0
0
0
1
0
1
1
MSB
LSB
Data
MSB
7
LSB
0
Q
6
5
4
3
2
1
Figure 11. Fast Read with 3-Byte Address and Dummy Byte
Rev. 3.0
August 2012
Page 8 of 17
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
