JEDEC Standard No. 216D.01
-i-
SERIAL FLASH DISCOVERABLE PARAMETERS (SFDP) STANDARD
Contents
Page
Foreword ...................................................................................................................................................... ix
Introduction .................................................................................................................................................. ix
1 Scope ................................................................................................................................................ 1
2 Normative reference ......................................................................................................................... 1
3 Terms and definitions ...................................................................................................................... 2
4 Read SFDP Command Protocol ....................................................................................................... 3
4.1 Instruction ........................................................................................................................................ 3
4.2 Address ............................................................................................................................................ 3
4.3 Wait States ....................................................................................................................................... 4
4.4 Clock Rate ........................................................................................................................................ 4
4.5 Command Modes ............................................................................................................................. 4
4.5.1 Read SFDP (1-1-1) Mode ................................................................................................................ 5
4.5.2 Read SFDP (2-2-2) Mode ................................................................................................................ 6
4.5.3 Read SFDP (4S-4S-4S) Mode ......................................................................................................... 6
4.5.4 Read SFDP (4S-4D-4D) Mode ........................................................................................................ 7
4.5.5 Read SFDP (8D-8D-8D) Mode ....................................................................................................... 7
4.5.6 Fetch SFDP (1-1-1) Mode ............................................................................................................... 8
4.5.7 Fetch SFDP (2-2-2) Mode ............................................................................................................... 8
4.5.8 Fetch SFDP (4S-4S-4S and 4S-4D-4D) Mode ................................................................................ 9
4.5.9 Fetch SFDP (8D-8D-8D) Mode ....................................................................................................... 9
5 Read SFDP Behavior ..................................................................................................................... 10
5.1 Security .......................................................................................................................................... 10
5.2 Reset and Hold Functions .............................................................................................................. 10
5.3 Read Wrap ..................................................................................................................................... 10
5.4 SFDP Address Boundary Wrap ..................................................................................................... 10
5.5 Reserved SFDP Locations ............................................................................................................. 10
6 SFDP Database .............................................................................................................................. 11
6.1 SFDP Header Structure .................................................................................................................. 11
6.2 SFDP Header ................................................................................................................................. 12
6.2.1 SFDP Header: 1
st
DWORD............................................................................................................ 12
6.2.2 SFDP Header: 2
nd
DWORD ........................................................................................................... 13
6.2.3 Definition of SFDP Access Protocol Field .................................................................................... 14
6.3 Parameter Headers ......................................................................................................................... 19
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