AT25QL641 datasheet(15/77 Pages) DIALOG

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AT25QL641

DS-25QL641–130E–10/2018

Instructions

The SPI instruction set of the AT25QL641 consists of thirty eight basic instructions and the QPI instruction set of the

AT25QL641 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 I/O [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. 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 the full 8 bits

has been clocked) otherwise the instruction is 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

commands except for Read Register are ignored until the program or erase cycle has completed.

7.1

Instruction Tables

Table 7-1.

Manufacturer and Device Identification

ID code

Instruction

Manufacturer ID

Adesto

1Fh

90h, 92h, 94h, 9Fh

Device ID

AT25QL641

16h

90h, 92h, 94h, ABh

Memory Type ID

SPI / QPI

43h

9Fh

Capacity Type ID

64M

17h

9Fh

Table 7-2.

Instruction Set Table 1 (SPI Instructions) (1)

Instruction Byte

Clock Number

0 - 7

8 - 15

16 - 23

24 - 31

32 - 39

40 - 47

Write Enable

06h

Write Enable

(for volatile Status registers)

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 (4 KB)

20h

A23:A16

A15:A8

A7:A0

Block Erase (32 KB)

52h

A23:A16

A15:A8

A7:A0

Block Erase (64 KB)

D8h

A23:A16

A15:A8

A7:A0

Chip Erase

60h/7Ch

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