FM3164-STR Ramtron, FM3164-STR Datasheet - Page 19

• Manufacturer Part Number: FM3164-STR
• Description: case, leaded, supervisor, reflow, soic, supply, process, max, ram, Interface ICs, package, compatible, voltage, memor...
• Manufacturer: Ramtron

Addressing FRAM Array in the FM31xx Family
The FM31xx family includes 256Kb, 64Kb, 16Kb, and 4Kb memory densities. The following 2-byte address field is
shown for each density.
Table 4. Two-Byte Memory Address
Rev. 2.3
Oct. 2006
Part #
By Master
By FM31xxx
By FM31xx
By Master
FM31256
FM3164
FM3116
FM3104
Start
S
Slave Address
* Although not required, it is recommended that A5-A7 in the Register Address byte are
Start
x
x
x
x
S
A14
x
x
x
0
A
Slave Address
zeros in order to preserve compatibility with future devices.
A13
x
x
x
Figure 15. Selective (Random) Memory Read
Address MSB
1
Address
st
Address Byte
A12
A12
x
x
Figure 16. Byte Register Write
A11
A11
x
x
0
A
A
A10
A10
A10
x
Address LSB
0 0 0
Acknowledge
Address & Data
A9
A9
A9
x
A8
A8
A8
A8
Address
A
Start
S
A7
A7
A7
A7
Acknowledge
Slave Address
Address
A6
A6
A6
A6
A
A5
A5
A5
A5
2
nd
1
Address Byte
A
Data Byte
A4
A4
A4
A4
A3
A3
A3
A3
Data Byte
FM3104/16/64/256
Data
A2
A2
A2
A2
Acknowledge
A1
A1
A1
A1
Page 19 of 25
No
A
1 P
A0
A0
A0
A0
P
Stop
Stop