MB85RS2MLY(AEC-Q100 Compliant)

DS501-00062-3v1-E

13



FSSRD

The SSRD command reads data from special sector (a special region of 256 Byte in FeRAM). SSWR op-

code and arbitrary 24 bits address are input to SI followed by 8 bits dummy. The 16-bit upper address is

invalid. Then, 8-cycle clock is input to SCK. SO is output synchronously to the falling edge of SCK. While

reading, the SI value is invalid. When CS is risen, the SSRD command is completed, but keeps on reading

with automatic address increment which is enabled by continuously sending clocks to SCK in unit of 8 cycles

before CS rising. When it reaches the most significant address, roll over is not happen.

The data in special sector is stable between before and after reflow. Refer “ REFLOW CONDITIONS AND

FLOOR LIFE” for the reflow condition.



BLOCK PROTECT

Writing protect block for WRITE command is configured by the value of BP0 and BP1 in the status register.



WRITING PROTECT

Writing operation of the WRITE command and the WRSR command are protected with the value of WEL,

WPEN, WP as shown in the table.

BP1

BP0

Protected Block

0

0

None

0

1

30000H to 3FFFFH (upper 1/4)

1

0

20000H to 3FFFFH (upper 1/2)

1

1

00000H to 3FFFFH (all)

WEL

WPEN

WP

Protected Blocks

Unprotected Blocks

Status Register

0

X

X

Protected

Protected

Protected

1

0

X

Protected

Unprotected

Unprotected

1

1

0

Protected

Unprotected

Protected

1

1

1

Protected

Unprotected

Unprotected

CS

SCK

SI

Invalid

MSB

LSB

MSB

Data Out

LSB

High-Z

Invalid

45

0123

29 30

6

8 9 1011

25262728

4647

31 32

38 39 40 41 42 43 44 45

01001001 X

6

4

210 X

XX

SO

7

XXX

65

0

543

33

X

21

3

24

23

7

X

7

24 bit addresses

ope. code

8 bit dummy