MB85RC256VPF-G Datasheet, PDF (10/36 Pages) Fujitsu Component Limited. – FUJITSU SEMICONDUCTOR

MB85RC256V
• 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 0000H and keeps reading.
...
A
Read
Data 8bits
A
Read
Data
... _A
Read
Data 8bits
NP
Access from master
Access from slave
P Stop Condition
A ACK (SDA is the "L" level)
N NACK (SDA is the "H" level)
• 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 F8H 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 F9H 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.
S
Reserved
Slave ID A
1
0
1
R
0 A2 A1A0 / A
S
Reserved
Slave ID
A ^{Data Byte} A
Data Byte
A
Data Byte _N
P
(F8_H)
W
(F9_H)
1st
2nd
3rd
Access from master
Access from slave
S Start Condition
P Stop Condition
A ACK (SDA is the "L" level)
N NACK (SDA is the "H" level)
Data Byte 1st
Data Byte 2nd
Data Byte 3rd
Manufacture ID = 00AH
Product ID = 510_H
11 10 9 8 7 6 5 4 3 2 1 0 11 10 9 8 7 6 5 4 3 2 1 0
Fujitsu Semiconductor
Density = 5_H
Proprietary use
000000001010010100010000
10
DS501-00017-3v0-E