ESMT

(Preliminary)

F25S04PA

Elite Semiconductor Memory Technology Inc.

21/34

Read-ID (RDID)

The Read-ID instruction (RDID) identifies the devices as F25

S04PA and manufacturer as ESMT. This command is backward

compatible to all ESMT SPI devices and should be used as

default device identification when multiple versions of ESMT SPI

devices are used in one design. The device information can be

read from executing an 8-bit command, 90H, followed by address

bits

Following

the

Read-ID

instruction,

the

manufacturer’s ID is located in address 00000H and the device

ID is located in address 00001H.

Once the device is in Read-ID mode, the manufacturer’s and

device ID output data toggles between address 00000H and

00001H until terminated by a low to high transition on CE .

Figure 19: Read-ID Sequence

Table 8: Product ID Data

Address

Byte1

Byte2

8CH

12H

00000H

Manufacturer’s ID

Device ID

ESMT F25S04PA

12H

8CH

00001H

Device ID

ESMT F25S04PA

Manufacturer’s ID

CE

SCK

SI

01 23 45 67 8

15 16

23 24

31 32

39 40

47 48

55 56

63

MSB

MSB

HIGH IMPENANCE

SO

90

00

00

ADD

1

MODE3

MODE0

Note: The Manufacture’s and Device ID output stream i s continuous until terminated by a low to high transition on CE.

1. 00H will output the Manufacture’s ID first and 01H will output Device ID first before toggling between the two. .

HIGH

IMPENANCE

8C

8C

12

12

MSB