AT25QL321 datasheet(50/79 Pages) DIALOG

tên linh kiện	AT25QL321

Giải thích chi tiết về linh kiện	32-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support

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AT25QL321

DS-25QL321–131C–5/2017

Figure 7-56. Enable Reset and Reset Instruction (SPI Mode)

Figure 7-57. Enable Reset and Reset Instruction (QPI Mode)

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.

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