24CSM01-ESLASHP datasheet(9/63 Pages) MICROCHIP

9 / 63 page

 2023 Microchip Technology Inc. and its subsidiaries

Preliminary

DS20006781B

-page 9

24CSM01

3.0

MEMORY ORGANIZATION

3.1

EEPROM Organization

The 24CSM01 is internally organized as 512 pages of

256 bytes each.

3.2

Device Registers

The 24CSM01 contains three types of registers that

modulate device operation and/or report on the current

status of the device. These registers are:

• Configuration register

• Security register

• Manufacturer ID register

3.2.1

CONFIGURATION REGISTER

The Configuration register allows for modification of the

device write protection behavior as well as additional

device features. Once the device behavior is set as

desired, the Configuration register can be permanently

locked (or set to read-only), thereby preventing any

subsequent

changes.

Refer

Section 9.0

“Configuration Register” for additional information

on the Configuration register.

3.2.2

SECURITY REGISTER

The Security register is split into a read-only section and

a user-programmable lockable, identification page

section.

The

read-only

section

contains

preprogrammed, ensured unique, 128-bit serial

number. The user-programmable (lockable ID page)

section of the Security register is ideal for applications

that need to irreversibly protect critical or sensitive

application data from ever being altered. For further

details

about

the

Security

refer

Section 10.0 “Security Register”.

3.2.3

MANUFACTURER ID REGISTER

The Manufacturer ID register is a read-only 24-bit

Manufacturer ID sequence. The 24-bit value returned

is unique to the 24CSM01. Refer to Section 11.0

“Manufacturer Identification Register” for further

details.

FIGURE 3-1:

MEMORY ORGANIZATION

Memory Address Range

Protection Features

1-Mbit

EEPROM

4-Kbit

Security

1-Mbit Address Range:

00000-1FFFF

128-Bit Serial Number

Address Range (0800h-080Fh)

Legacy Protection Mode

• Full Array Write Protection

via the Write-Protect Pin

Enhanced Protection Mode

• Individual Zone Protection

Based on Contents of

Configuration Register

Read-Only

Permanently Lockable by

Software

User-Programmable Lockable ID Page

Address Range (0900h-090Fh)

Reserved for Future Use

Address Range (0810h-08FFh)

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