MB85RC04VPNF-G Datasheet, PDF (8/36 Pages) Fujitsu Component Limited. – 4 K (512 × 8) Bit I2C

MB85RC04V
■ COMMAND
• Byte Write
If the device address word (R/W “0” input) is sent after the start condition, the slave responds with an ACK.
After this ACK, write memory addresses and write data are sent in the same way, and the write ends by
generating a stop condition at the end.
S 1 0 1 0 A2 A1 A8 0 A
Address
Low 8bits
A
Write
Data 8bits
AP
X
MSB
X X X X X X XX
LSB
Access from master
Access from slave
S Start Condition
P Stop Condition
A ACK (SDA is the "L" level)
• Page Write
If additional 8 bits are continuously sent after the same command (except stop condition) as Byte Write, a
page write is performed. The memory address rolls over to first memory address (000H) at the end of the
address. Therefore, if more than 512bytes are sent, the data is overwritten in order starting from the start of
the memory address that was written first.
As the FRAM performs the high-speed write operations, the data will be written to FRAM right after the ACK
response finished.
S 1 0 1 0 A2 A1 A8 0 A
Address
Low 8bits
A
Write
Data 8bits
A
Write
Data
... A P
Access from master
Access from slave
S Start Condition
P Stop Condition
A ACK (SDA is the "L" level)
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DS501-00016-2v0-E