Datasheet

MB85RC256V
10 DS501-00017-3v0-E
• Sequential Read
Data can be received continuously following the Device address word (R/W “1” input) after specifying the
address in the same way as for Random Read. If the read reaches the end of address, the internal read
address automatically rolls over to first memory address 0000
H and keeps reading.
•Device ID
The Device ID command reads fixed Device ID. The size of Device ID is 3 bytes and consists of manufacturer
ID and product ID. The Device ID is read-only and can be read out by following sequences.
a) The master sends the Reserved Slave ID F8
H after the START condition.
b) The master sends the device address word after the ACK response from the slave.
In this device address word, R/W code are “Don't care” value.
c) The master re-sends the START condition followed by the Reserved Slave ID F9
H after the ACK response
from the slave.
d) The master read out the Device ID succeedingly in order of Data Byte 1st / 2nd / 3rd after the ACK
response from the slave.
e) The master respnds the NACK (SDA is the “H” level) after reading 3 bytes of the Device ID.
In case the master respond the ACK after reading 3 bytes of the Device ID, the master re-reading the
Device ID from the 1st byte.
Stop Condition
ACK (SDA is the "L" level)A
P
NACK (SDA is the "H" level)
N
AA A
N
P
Read
Data 8bits
Read
Data 8bits
Read
Data
......
Access from master
Access from slave
11 10 9 8 76543210111098 76543210
000000001010010100010000
Fujitsu Semiconductor Density = 5
H
Proprietary use
Manufacture ID = 00A
H
Product ID = 510
H
Data Byte 1st Data Byte 2nd Data Byte 3rd
Reserved
Slave ID
(F8
H
)
Reserved
Slave ID
(F9
H
)
A1010
A2A1A0
R
/
W
ASS
A
Data Byte
1st
Data Byte
2nd
Data Byte
3rd
AAN P
S
P
A
N
Access from master
Access from slave
Stop Condition
ACK (SDA is the "L" level)
NACK (SDA is the "H" level)
Start Condition