S25FL128K Meet Spansion Inc., S25FL128K Datasheet - Page 46

• Manufacturer Part Number: S25FL128K
• Description: 128-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

46
6.2.31
Read JEDEC ID (9Fh)
For compatibility reasons, the S25FL128K 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 flash memories that was adopted in 2003. The instruction is initiated by driving the CS# pin
low and shifting the instruction code “9Fh”. The JEDEC assigned Manufacturer ID byte and two Device ID
bytes, Memory Type (ID15-ID8) and Capacity (ID7-ID0) are then shifted out on the falling edge of CLK with
most significant bit (MSB) first as shown in
Manufacturer and Device Identification table.
CLK
CLK
CS#
CS#
SO
SO
SI
SI
Mode 3
Mode 0
= MSB
15
15
7
16
16
0
6
17
17
Memory Type ID15-ID8
Figure 6.37 Read JEDEC ID Instruction Sequence
1
5
18
D a t a
18
High Impedance
Instruction (9Fh)
2
4
19
19
3
3
20
S25FL128K
20
S h e e t
4
2
Figure
21
21
5
1
22
22
6.37. For memory type and capacity values refer to
6
0
23
23
( P r e l i m i n a r y )
7
7
24
24
8
6
25
25
9
5
Capacity ID7-ID0
26
Manufacturer ID (EFh)
26
10
4
27
27
11
3
28
28
12
2
29
29
S25FL128K_00_02 April 1, 2011
13
1
30
30 31
14 15
0
31
Mode 3
Mode 0