MB85AS12MT

DS501-00071-1v1-E

9



RDID

The RDID command reads fixed Device ID. After performing RDID op-code to SI, 32-cycle clock is input to

SCK. The SI value is invalid for this time. SO is output synchronously to a falling edge of SCK. The output

is in order of Manufacturer ID (8bit)/Continuation code (8bit)/Product ID (1st Byte)/Product ID (2nd Byte).

In the RDID command, SO holds the output state of the last bit in 32-bit Device ID until CS is risen.

SO

SCK

SI

CS

MSB

7

6

5

4

3

2

1

0

Data Out

Data Out

High-Z

LSB

11

10

9

8

33

32

31

39

38

37

36

35

34

Invalid

30

28

29

31

10011111

20

1

3

64

5

7

8

bit

7

6

5

4

3

2

1

0 Hex

Manufacturer ID

0

0

0

0

0

1

0

0

04H Fujitsu

Continuation code

0

1

1

1

1

1

1

1

7FH

Proprietary use

Density

Hex

Product ID (1st Byte)

1

0

1

1

1

1

0

0

BCH Density: 11100B  12 Mbit

Proprietary use

Hex

Product ID (2nd Byte)

0

0

0

0

0

0

1

1

03H