SST25WF080B datasheet(20/44 Pages) MICROCHIP

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SST25WF080B

DS20005164H-page 20

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5.14

Read-ID

The Read-ID instruction identifies the device as

SST25WF080B. Use the Read-ID instruction to identify

SST25WF080B when using multiple manufacturers in

the same socket. See Table 5-2.

The device ID information is read by executing an 8-bit

command, ABH, followed by 24 dummy address bits.

Following the Read-ID instruction, and 24 address

dummy bits, the device ID continues to output with con-

tinuous clock input until terminated by a low-to-high

transition on CE#.

FIGURE 5-15:

READ-ID SEQUENCE

5.15

JEDEC Read-ID

The JEDEC Read-ID instruction identifies the device ID

information of SST25WF080B. The device information

can be read by executing the 8-bit command, 9FH. Fol-

lowing the JEDEC Read-ID instruction, a 32-bit device

ID information is output from the device. The Device ID

information is assigned by the manufacturer and con-

tains the Device ID 1 in the first byte, the type of mem-

ory in the second byte, the memory capacity of the

device in the third byte, and a reserved code in the

fourth byte. The 4-byte code outputs repeatedly with

continuous clock input until a low-to-high transition on

CE#. See Figure 5-16 for the instruction sequence. The

JEDEC Read ID instruction is terminated by a low-to-

high transition on CE# at any time during data output.

FIGURE 5-16:

JEDEC READ-ID SEQUENCE

TABLE 5-2:

PRODUCT IDENTIFICATION

Device ID

Address

Data

SST25WF080B ID

XXXXXXH

86H

Note: The Device ID output stream is continuous until terminated by a low-to-high transition on CE#.

CE#

SCK

0 1 234 5 6 78

High-Impedance

15 16

23 24

31 32

39 40

47 48

55 56

Device ID

High-Impedance

MODE 3

MODE 0

MSb

Device ID

TABLE 5-3:

JEDEC READ-ID DATA-OUT

Product

Device ID

Device ID 1

(Byte 1)

Memory Type (Byte 2)

Memory Capacity (Byte 3)

Reserved Code

(Byte 4)

SST25WF080B

62H

16H

14H

00H

CE#

SCK

012345678

High-Impedance

15 16

28 29 30 31

MODE 3

MODE 0

MSb

9 10111213

1718

19 20 21 22 23

24 25 26 27

37 38 39

35 36

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