MB85AS12MT

10

DS501-00071-1v1-E



RDUID

The RDUID command reads (common) Device ID and (each chip-specific) Unique ID. After performing

RDUID op-code to SI, 96-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) as Device ID and Lot ID (40bit) / Wafer ID (8bit) / Chip

ID (16bit) as Unique ID. In the RDUID command, SO holds the output state of the last bit in 96-bit Device

ID and Unique 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

97

96

95

103

102

101

100

99

98

Invalid

94

92

93

95

10000011

20

1

3

64

5

7

8

Bits

Field

Value

Description

Device ID

[95:88]

Manufacture ID

04h

Fujitsu

Device ID

[87:80]

Continuation code

7Fh

Device ID

[79:72]

Product ID

BCh

101b: Proprietary use

11100b: Density (12 Mbit)

Device ID

[71:64]

Product ID

03h

Proprietary use

Unique ID

[63:24]

Lot ID

64 bit

Unique ID

Unique ID

[23:16]

Wafer ID

Unique ID

[15:0]

Chip ID