45PE80 View Datasheet(PDF) - Micron Technology

Part Name

Description

Manufacturer

45PE80

Micron Serial NOR Flash Memory

Micron Technology 

75MHz, Serial Peripheral Interface Flash Memory

READ IDENTIFICATION

READ IDENTIFICATION

The READ IDENTIFICATION command reads the following device identification data:

• Manufacturer identification (1 byte): This is assigned by JEDEC.

• Device identification (2 bytes): This is assigned by device manufacturer; the first byte

indicates memory type, and the second byte indicates device memory capacity.

• A unique ID code (UID) (17 bytes, 16 available upon customer request): The first byte

contains the length of the data to follow; the remaining 16 bytes contain optional cus-

tomized factory data (CFD) content.

Table 6: READ IDENTIFICATION Data-Out Sequence

Manufacturer

Identification

20h

Device Identification

Memory Type

Memory Capacity

40h

14h

CFD Length

10h

UID

CFD Content

16 bytes

Note: 1. The CFD bytes are read-only and can be programmed with customer data upon demand.

If customers do not make requests, the devices are shipped with all the CFD bytes pro-

grammed to 0.

A READ IDENTIFICATION command is not decoded while an ERASE or PROGRAM cy-

cle is in progress and has no effect on a cycle in progress.

The device is first selected by driving chip select (S#) LOW. Then, the 8-bit command

code is shifted in, and content is shifted out on serial data output (DQ1) as follows: the

24-bit device identification stored in memory, then the 8-bit CFD length, followed by 16

bytes of CFD content. Each bit is shifted out during the falling edge of the serial clock

(C).

The READ IDENTIFICATION command is terminated by driving S# HIGH at any time

during data output. When S# is driven HIGH, the device is put in the standby power

mode and waits to be selected so that it can receive, decode, and execute commands.

PDF: 09005aef845660e5

m45pe80.pdf - Rev. C 03/14 EN

19

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