ESMT
(Preliminary)
F25S04PA
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 [A23 -A0]. 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 .
CE
15 16
31 32
0
1
2
3
4
5
6
7
8
23 24
MSB
39 40
47 48
55 56
63
MODE3
SCK MODE0
SI
90
00
00
ADD1
MSB
HIGH
IMPENANCE
HIGH IMPENANCE
SO
8C
12
8C
12
MSB
Note: The Manufacture’s and Device IDoutput stream iscontinuous 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. .
Figure 19: Read-ID Sequence
Table 8: Product ID Data
Address
Byte1
Byte2
8CH
12H
00000H
Device ID
Manufacturer’s ID
ESMT F25S04PA
12H
8CH
00001H
Device ID
Manufacturer’s ID
ESMT F25S04PA
Elite Semiconductor Memory Technology Inc.
Publication Date: May 2009
Revision: 0.2 21/34
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
