24CS512-ESLASHP datasheet(9/66 Pages) MICROCHIP

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DS20005769C-page 9

24CS512

3.0

MEMORY ORGANIZATION

3.1

EEPROM Organization

The 24CS512 is internally organized as 512 pages of

128 bytes each.

3.2

Device Registers

The 24CS512 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 to Section 9.0 “Configu-

ration 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 a prepro-

grammed, 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 more details about the

Security register, refer to Section 10.0 “Security

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 24CS512. Refer to Section 11.0

“Manufacturer Identification Register” for more

details.

FIGURE 3-1:

MEMORY ORGANIZATION

Memory Address Range

Protection Features

512-Kbit

EEPROM

2-Kbit

Security

512-Kbit Address Range:

0000h-FFFFh

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 (0880h-08FFh)

Reserved for Future Use

Address Range (0810h-087Fh)

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