ESMT
F25L004A
JEDEC Read-ID
The JEDEC Read-ID instruction identifies the device as F25L004A and the manufacturer as ESMT. The device information can be read
from executing the 8-bit command,.9FH. Following the JEDEC Read-ID instruction, the 8-bit manufacturer’s ID, 8CH, is output from the
device. After that, a 16-bit device ID is shifted out on the SO pin. Byte1, BFH, identifies the manufacturer as ESMT. Byte2, 20H (for TOP),
21H (for BOTTOM),identifies the memory type as SPI Flash. Byte3, 13H, identifies the device as F25L004A. The instruction sequence is
shown in Figure17.
The JEDEC Read ID instruction is terminated by a low to high transition on CE at any time during data output. If no other command is
issued after executing the JEDEC Read-ID instruction, issue a 00H (NOP) command before going into Standby Mode ( CE =VIH).
CE
0 1 2 3 4 5 6 7 8 9
1819 20 2122 2324 2526 272829 30 3132 3334
MODE3
MODE0
10 1112 1314 1516 17
SCK
SI
9F
HIGH IMPENANCE
SO
8C
20 or 21
13
MSB
MSB
Figure 17 : Jedec Read ID Sequence
Table 9 : JEDEC READ-ID DATA
Device ID
Manufacturer’s ID
Memory Type
Memory Capacity
Byte1
Byte 2
Byte 3
20H (for TOP)
8CH
13H
21H (for Bottom)
Elite Semiconductor Memory Technology Inc.
Publication Date: Apr. 2007
Revision: 1.2
22/32
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
