MB85RC64
■ BLOCK DIAGRAM
Serial/Parallel Converter
SDA
FRAM Array
8,192 × 8
SCL
WP
Column Decoder/Sense Amp/
Write Amp
A0, A1, A2
■ I2C (Inter-Integrated Circuit)
The MB85RC64 has the two-wire serial interface; the I2C bus,and operates as a slave device.
The I2C bus defines communication roles of “master” and “slave” devices, with the master side holding the
authority to initiate control. Furthermore, a I2C 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.
• I2C Interface System Configuration Example
VDD
Pull-up
Resistors
SCL
SDA
I2C Bus
MB85RC64
I2C Bus
MB85RC64
I2C Bus
MB85RC64
I2C Bus
Master
...
A2 A1 A0
A2 A1 A0
A2 A1 A0
0
0
0
0
0
1
0
1
0
Device address
DS05–13109–3E
3
FUJITSU [ FUJITSU ]
