S25FL004K Meet Spansion Inc., S25FL004K Datasheet - Page 56

• Manufacturer Part Number: S25FL004K
• Description: 4-mbit / 8-mbit / 16-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

7.32
56
Read SFDP Register (5Ah)
The S25FL004K/S25FL008K/S25FL016K features a 256-byte Serial Flash Discoverable Parameter (SFDP)
register that contains information about devices operational capability such as available commands, timing
and other features. The SFDP parameters are stored in one or more Parameter Identification (PID) tables.
Currently only one PID table is specified but more may be added in the future. The Read SFDP Register
instruction is compatible with the SFDP standard initially established in 2010 for PC and other applications.
The Read SFDP instruction is initiated by driving the CS# pin low and shifting the instruction code “5Ah”
followed by a 24-bit address (A23-A0)(1) into the SI pin. Eight “dummy” clocks are also required before the
SFDP register contents are shifted out on the falling edge of the 40th CLK with most significant bit (MSB) first
as shown in
Note: A23-A8 = 0; A7-A0 are used to define the starting byte address for the 256-byte SFDP Register.
CLK
CLK
CS#
CS#
SO
SO
SI
SI
Byte Address
Mode 3
Mode 0
0Ah
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
= MSB
Figure
32
Table 7.6 Serial Flash Discoverable Parameter Definition Table (Sheet 1 of 2)
0
33 34 35
7.36. For SFDP register values and descriptions, refer to
1
Dummy Byte
Figure 7.36 Read SFDP Register Instruction Sequence Diagram
Instruction (5Ah)
Data
2
53h
46h
44h
50h
01h
01h
FFh
EFh
00h
00h
01h
S25FL004K / S25FL008K / S25FL016K
3
36 37
4
SFDP Signature
SFDP Signature
SFDP Signature
SFDP Signature
SFDP Minor Revisions
SFDP Major Revisions
Number of Parameter Headers (NPH)
Reserved
PID (3)(0): Manufacturer JEDEC ID
PID(0): Serial Flash Basics Minor Revisions
PID(0): Serial Flash Basics Major Revisions
5
38 39 40 41
6
7
7
23
D a t a
8
6
22 21
9
Description
5
Data Out 1
42 43
24-bit Address
10
4
S h e e t
3
3
44 45 46
28 29
2
2
1
1
30 31
0
47
0
7
S25FL004K-016K_00_02 July 14, 2011
6
Table
5
Serial Flash Basics Revision 1.0
Data Out 2
SFDP Signature = 50444653h
4
7.6.
1 Parameter Header
SFDP revision 1.1
3
Comment
2
EFh
1
0
7