M95128-MN3TP/P STMICROELECTRONICS [STMicroelectronics], M95128-MN3TP/P Datasheet - Page 22

• Manufacturer Part Number: M95128-MN3TP/P
• Description: 128 Kbit serial SPI bus EEPROM with high speed clock
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Instructions
5.6.1
22/44
Figure 11. Page Write (WRITE) sequence
1. The most significant address bits (b15, b14) are Don’t Care.
ECC (error correction code) and write cycling
Most M95128, M95128-W and M95128-R devices offer an ECC (error correction code) logic
which compares each 4-byte word with 6 EEPROM bits of ECC (the list of concerned
devices is defined in
temperature
erroneous during a read operation, the ECC detects it and replaces it by the correct value.
The read reliability is therefore improved by the use of this feature.
Note however that even if a single byte has to be written, 4 bytes are internally modified
(plus the ECC bits), that is, the addressed byte is cycled together with the three other bytes
making up the word. It is therefore recommended to write by packets of 4 bytes in order to
benefit from the larger amount of write cycles.
The maximum number of write cycles is qualified at 1 Million (1 000 000) write cycles, using
a cycling routine that writes to the device by multiples of 4-byte packets.
S
C
D
S
C
D
grade)). As a result, if a single bit out of 4 bytes of data happens to be
7
32
0
6
33
1
5
34
Data Byte 2
Table 24: Available M95128x products (package, voltage range,
2
4
Instruction
35 36 37 38 39 40 41 42
3
3
4
2
5
Doc ID 5798 Rev 13
1
6
0
7
7
15
8
6
14 13
9 10
5
Data Byte 3
16-Bit Address
4
43
3
44 45 46 47
3
20 21 22 23 24 25 26 27
2
2
1
1
0
0
M95128, M95128-W, M95128-R
7
6
6
5
Data Byte N
5
Data Byte 1
4
4
3
3
28 29 30
2
2
1
1
0
0
31
AI01796D