AT25QL321 datasheet(13/79 Pages) DIALOG

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AT25QL321

DS-25QL321–131C–5/2017

Instructions

The SPI instruction set of the AT25QL321 consists of thirty eight basic instructions and the QPI instruction set of the

AT25QL321 consists of thirty one basic instructions that are fully controlled through the SPI bus (see Instruction Set

table). Instructions are initiated with the falling edge of Chip Select (CS). The first byte of data clocked into the input

pins (SI or IO [3:0]) provides the instruction code. Data on the SI input is sampled on the rising edge of clock with

most significant bit (MSB) first.

Instructions are completed with the rising edge of edge CS. Clock relative timing diagrams for each instruction are

included in figures 8-1 through 8-66 All read instructions can be completed after any clocked bit. However, all instructions

that Write, Program or Erase must complete on a byte (CS driven high after a full 8‐bit have been clocked) otherwise the

instruction will be terminated. This feature further protects the device from inadvertent writes. Additionally, while the

memory is being programmed or erased, or when the Status Register is being written, all instructions except for Read

Table 7-1.

Manufacturer and Device Identification

ID code

Instruction

Manufacturer ID

Adesto

1Fh

90h, 92h, 94h, 9Fh

Device ID

AT25QL321

15h

90h, 92h, 94h, ABh

Memory Type ID

SPI / QPI

42h

9Fh

Capacity Type ID

32M

16h

9Fh

7.1

Instruction Set Tables

Table 7-2.

Instruction Set Table 1 (SPI instruction)(1)

INSTRUCTION NAME

BYTE 1

BYTE 2

BYTE 3

BYTE 4

BYTE 5

BYTE 6

(CLOCK NUMBER)

(0 – 7)

(8 - 15)

(16 ‐ 23)

(24 ‐ 31)

(32 ‐ 39)

(40 ‐ 47)

Write Enable

06h

Write Enable

For Volatile

50h

Write Disable

04h

Read

Status Register‐1

05h

(SR7-SR0)(2)

Read

Status Register‐2

35h

(SR15‐SR8)(2)

Write

Status Register‐1

01h

(SR7-SR0)

(SR15‐SR8)

Write

Status Register‐2

31h

(SR15‐SR8)

Read Data

03h

A23‐A16

A15‐A8

A7-A0

(D7‐D0)

Fast Read Data

0Bh

A23‐A16

A15‐A8

A7-A0

dummy

(D7‐D0)

Page Program

02h

A23‐A16

A15‐A8

A7-A0

(D7‐D0)(3)

Enable QPI

38h

Block Erase(4KB)

20h

A23‐A16

A15‐A8

A7-A0

Block Erase(32KB)

52h

A23‐A16

A15‐A8

A7-A0

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