AT25QL321 datasheet(42/79 Pages) DIALOG

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AT25QL321

DS-25QL321–131C–5/2017

7.27 Read Manufacturer / Device ID Quad I/O (94h)

The Read Manufacturer/ Device ID Quad I/O instruction provides both the JEDEC assigned manufacturer ID and the

specific device ID.

The Read Manufacturer/ Device ID instruction is very similar to the Fast Read Quad I/O instruction. The instruction is

initiated by driving the CS pin low and shifting the instruction code “94h” followed by a 24‐bit address (A23-A0) of

000000h. After which, the Manufacturer ID for Adesto (1Fh) and the Device ID(15h) are shifted out on the falling edge of

SCK with most significant bit (MSB) first as shown in Figure 7-45. If the 24‐bit address is initially set to 000001h the

Device ID will be read first and then followed by the Manufacturer ID. The Manufacturer and Device ID can be read

continuously, alternating from one to the other. The instruction is completed by driving CS high.

Figure 7-45. Read Quad Manufacturer/ Device ID Quad I/O instruction (SPI Mode)

JEDEC ID (9Fh)

For compatibility reasons, the AT25QL321 provides several instructions to electronically determine the identity of the

device. The Read JEDEC ID instruction is congruous with the JEDEC standard for SPI compatible serial flash memories

that was adopted in 2003. The instruction is entered by driving the CS pin low with following the instruction code “9Fh”.

JEDEC assigned Manufacturer ID byte for Adesto (1Fh) and two Device ID bytes, Memory Type (ID-15-ID8) and

Capacity (ID7-ID0) are then shifted out on the falling edge of SCK with most significant bit (MSB) first shown in Figure

7-46 and Figure 7-47. For memory type and capacity values refer to Manufacturer and Device Identification table. The

JEDEC ID can be read continuously. The instruction is terminated by driving CS high.

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