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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT25QL641 датащи(PDF) 59 Page - Renesas Technology Corp |
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AT25QL641 датащи(HTML) 59 Page - Renesas Technology Corp |
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59 / 80 page  DS-AT25QL641-130 Rev. G Page 59 Sep 14, 2022 © 2022 Renesas Electronics AT25QL641 Datasheet 8.35 Read Serial Flash Discovery Parameter (5Ah) The Read Serial Flash Discovery Parameter (SFDP) command 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 the erased state (FFh). The command sequence for the read SFDP has the same structure as that of a Fast Read command. First, the device is selected by driving Chip Select (CS) low. Next, the 8-bit command 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 command sequence is shown here. The Read SFDP command is terminated by driving Chip Select (CS) high at any time during data output. Figure 59. Read SFDP Register Command 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 35 246 7 28 30 10 29 31 9 8 23 22 21 3 2 1 0 0 0 1 Mode 3 Mode 0 High-Impedance High-Impedance SO SI SCK CS SO SI SCK CS Command (5Ah) 24-Bit Address MSB MSB MSB Dummy Byte Data Out 1 Data Out 2 7654 3210 7654 3210 7654 3210 7 |
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