Datasheet

MB85RC256V
DS501-00017-3v0-E 3
■ BLOCK DIAGRAM
■ I
2
C (Inter-Integrated Circuit)
The MB85RC256V has the two-wire serial interface; the I
2
C bus,and operates as a slave device.
The I
2
C bus defines communication roles of “master” and “slave” devices, with the master side holding the
authority to initiate control. Furthermore, the I
2
C bus connection is possible where a single master device is
connected to multiple slave devices in a party-line configuration. In this case, it is necessary to assign a
unique device address to the slave device, the master side starts communication after specifying the slave
to communicate by addresses.
• I
2
C Interface System Configuration Example
WP
A0, A1, A2
SDA
SCL
Row Decoder
Address Counter
FRAM Array
32,768 × 8
Serial/Parallel Converter
Column Decoder/Sense Amp/
Write Amp
Control Circuit
SCL
SDA
A2 A1 A0
000
A2 A1 A0
001
A2 A1 A0
010
...
I
2
C Bus
Master
I
2
C Bus
MB85RC256V
I
2
C Bus
MB85RC256V
I
2
C Bus
MB85RC256V
Pull-up
Resistors
Device address
VDD