M95512-R datasheet(25/50 Pages) STMICROELECTRONICS

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M95512-W M95512-R M95512-DR M95512-DF

Instructions

Figure 14. Page Write (WRITE) sequence

6.6.1

Cycling with Error Correction Code (ECC)

M95512 and M95512-D devices offer an Error Correction Code (ECC) logic. The ECC is an

internal logic function which is transparent for the SPI communication protocol.

The ECC logic is implemented on each group of four EEPROM bytes(c). Inside a group, if a

single bit out of the four bytes happens to be erroneous during a Read operation, the ECC

detects this bit and replaces it with the correct value. The read reliability is therefore much

improved.

Even if the ECC function is performed on groups of four bytes, a single byte can be

written/cycled independently. In this case, the ECC function also writes/cycles the three

other bytes located in the same group(c). As a consequence, the maximum cycling budget is

defined at group level and the cycling can be distributed over the four bytes of the group: the

sum of the cycles seen by byte0, byte1, byte2 and byte3 of the same group must remain

below the maximum value defined in Table 13.

AI01796D

35 36 37 38 39 40 41 42

44 45 46 47

3456789 10

20 21 22 23 24 25 26 27

14 13

3210

28 29 30

Instruction

16-Bit Address

765432

Data Byte 1

765432

Data Byte 2

765432

Data Byte 3

65432

Data Byte N

c. A group of four bytes is located at addresses [4*N, 4*N+1, 4*N+2, 4*N+3], where N is an integer.

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