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S25FS256S Datasheet(PDF) 142 Page - SPANSION |
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S25FS256S Datasheet(HTML) 142 Page - SPANSION |
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142 / 154 page  142 S25FS-S Family S25FS-S_00_04 November 6, 2013 Data Sheet (Pre limin ar y) 12.3 Serial Flash Discoverable Parameters (SFDP) Address Map The SFDP address space has a header starting at address zero that identifies the SFDP data structure and provides a pointer to each parameter. One parameter is mandated by the JEDEC JESD216 standard. Spansion provides an additional parameter by pointing to the ID-CFI address space i.e. the ID-CFI address space is a sub-set of the SFDP address space. The JEDEC parameter is located within the ID-CFI address space and is thus both a CFI parameter and an SFDP parameter. In this way both SFDP and ID-CFI information can be accessed by either the RSFDP or RDID commands. 12.3.1 Field Definitions Table 12.20 SFDP Overview Map Relative Byte Address Offset SFDP Dword Address Description 0000h 00h Location zero within SFDP space - start of SFDP header. ,,, ... Remainder of SFDP header followed by undefined space. 1000h 400h Location zero within ID-CFI space - start of ID-CFI. ... ... ID-CFI parameters. 1120h 448h Start of SFDP JEDEC parameter which is also part of a CFI parameter. ... ... Remainder of SFDP JEDEC parameter followed by either more CFI parameters or undefined space. Table 12.21 SFDP Header Relative Byte Address Offset SFDP Dword Address Data Description 00h 00h 53h This is the entry point for Read SFDP (5Ah) command i.e. location zero within SFDP space ASCII “S” 01h 46h ASCII “F” 02h 44h ASCII “D” 03h 50h ASCII “P” 04h 01h 00h SFDP Minor Revision 05h 01h SFDP Major Revision 06h 01h Number of Parameter Headers (zero based, 01h = 2 parameters) 07h FFh Unused 08h 02h 00h Manufacturer ID (JEDEC SFDP Mandatory Parameter) 09h 00h Parameter Minor Revision 0Ah 01h Parameter Major Revision 0Bh 09h Parameter Table Length (in double words = Dwords = 4 byte units) 0Ch 03h 48h Parameter Table Pointer Byte 0 (Dword = 4-byte aligned) JEDEC parameter byte offset = 1120h = 448h Dword address 0Dh 04h Parameter Table Pointer Byte 1 0Eh 00h Parameter Table Pointer Byte 2 0Fh FFh Unused 10h 04h 01h Manufacturer ID (Spansion) 11h 00h Parameter Minor Revision 12h 01h Parameter Major Revision 13h 51h Parameter Table Length (in double words = Dwords = 4-byte units) 14h 05h 00h Parameter Table Pointer Byte 0 (Dword = 4-byte aligned) Entry point for ID-CFI parameter is byte offset = 1000h relative to SFDP location zero. 1000h Bytes = 400h Dwords 15h 04h Parameter Table Pointer Byte 1 16h 00h Parameter Table Pointer Byte 2 17h FFh Unused |
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