ESMT
F25L08QA (2S)
Read-ID (RDID)
The Read-ID instruction (RDID) identifies the devices as
F25L08QA 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 000000H
and the device ID is located in address 000001H.
Once the device is in Read-ID mode, the manufacturer’s and
device ID output data toggles between address 000000H and
000001H 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
13
8C
13
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 28: Read ID Sequence
Table 8: Product ID Data
Address
Byte1
Byte2
8CH
13H
000000H
Device ID
Manufacturer’s ID
ESMT F25L08QA
13H
8CH
000001H
Device ID
Manufacturer’s ID
ESMT F25L08QA
Elite Semiconductor Memory Technology Inc.
Publication Date: Nov. 2013
Revision: 1.2 31/43
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
