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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT25SL641 датащи(PDF) 52 Page - Dialog Semiconductor |
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AT25SL641 датащи(HTML) 52 Page - Dialog Semiconductor |
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52 / 76 page  51 AT25SL641 DS-25SL641–113F–12/2018 7.35 Read Serial Flash Discovery Parameter (5Ah) The Read Serial Flash Discovery Parameter (SFDP) instruction allows reading the Serial Flash Discovery Parameter area (SFDP). This SFDP area is composed of 2048 read-only bytes containing operating characteristics and vendor specific information. The SFDP area is factory programmed. If the SFDP area is blank, the device is shipped with all the SFDP bytes at FFh. If only a portion of the SFDP area is written to, the portion not used is shipped with bytes in erased state (FFh). The instruction sequence for the read SFDP has the same structure as that of a Fast Read instruction. First, the device is selected by driving Chip Select (CS) low. Next, the 8-bit instruction code (5Ah) and the 24-bit address are shifted in, followed by 8 dummy clock cycles. The bytes of SFDP content are shifted out on the Serial Data Output (SO) starting from the specified address. Each bit is shifted out during the falling edge of Serial Clock (SCK). The instruction sequence is shown here. The Read SFDP instruction is terminated by driving Chip Select (CS) High at any time during data output. Figure 7-55. Read SFDP Register Instruction Table 7-9. SFDP Signature and Headers Description Comment Address (h) Byte Address (Bit) Data (b) (Bit) Data (h) (Byte) SFDP Signature 00h 07:00 0101 0011 53h 01h 15:08 0100 0110 46h 02h 23:16 0100 0100 44h 03h 31:24 0101 0110 50h SFDP Minor Revision Start from 00h 04h 07:00 0000 0110 06h SFDP Major Revision Start from 01h 05h 15:08 0000 0001 01h Number of Parameters Headers Start from 00h 06h 23:16 0000 0001 01h |
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