S-24C256C Datasheet, PDF (9/35 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

Rev.2.0_02_S
2-WIRE SERIAL E²PROM
S-24C256C
 ECC Function (Error correction function)
S-24C256C Series adds 6 ECC bits for error correction to each 4 bytes with the same address of W14 to W2. The ECC
function can make correction and output correct data even if wrong data of 1 bit is in the 4 bytes when reading.
In addition, the S-24C256C Series rewrites the 4 bytes used as the rewriting minimum unit and 6 ECC bits if only 1 byte
data is input.
Therefore, it is recommended to rewrite data of each 4 bytes with the same address of W14 to W2 in order to get the
maximum endurance in the application in which the data is rewrote frequently.
 Operation
1. Start condition
Start is identified by a high to low transition of the SDA line while the SCL line is stable at high.
Every operation begins from a start condition.
2. Stop condition
Stop is identified by a low to high transition of the SDA line while the SCL line is stable at high.
When a device receives a stop condition during a read sequence, the read operation is interrupted, and the device
enters standby mode.
When a device receives a stop condition during a write sequence, the reception of the write data is halted, and the
S-24C256C initiates a write cycle.
t_SU.STA t_HD.STA
t_SU.STO
SCL
SDA
Start Condition
Figure 8 Start / Stop Conditions
Stop Condition
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