FM25Q32
11.2.25 JEDEC ID (9Fh)
For compatibility reasons, the FM25Q32 provides several instructions to electronically determine
the identity of the device. The Read JEDEC ID instruction is compatible with the JEDEC standard
for SPI compatible serial memories that was adopted in 2003. The instruction is initiated by driving
the /CS pin low and shifting the instruction code “9Fh”. The instruction JEDEC assigned
Manufacturer ID byte for FIDELIX SEMICONDUCTOR(F8h) and two Device ID bytes, Memory
Type(ID-15-ID8) and Capacity (ID7-ID0) are then shifted out on the falling edge of CLK with most
significant bit (MSB) first shown in figure 25. For memory type and capacity values refer to
Manufacturer and Device Identification table. The JEDEC ID can be read continuously. The
instruction is completed by driving/CS high.
/CS
CLK
Mode 3
Mode 0
DI
DO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Instruction (9Fh)
High Impedance
Manufacturer ID (F8h)
/CS
CLK
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Mode 3
Mode 0
DI
DO
* = MSB
Memory Type ID 15-ID8
Capacity ID7-ID0
7 6 54 3 2 1 0 7 6 54 3 2 1 0
Figure 25. Read JEDEC ID
preliminary(Aug.18.2010) 43