DS28EC20: 20Kb 1-Wire EEPROM

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Figure 5. Memory Map

ADDRESS RANGE

TYPE

DESCRIPTION

PROTECTION CODES (NOTES)

0000h to 00FFh

R/(W)

Data Memory

Pages 0 to 7 (Block 0)

(Protection controlled by address 0A00h)

0100h to 01FFh

R/(W)

Data Memory

Pages 8 to 15 (Block 1)

(Protection controlled by address 0A01h)

0200h to 02FFh

R/(W)

Data Memory

Pages 16 to 23 (Block 2)

(Protection controlled by address 0A02h)

0300h to 03FFh

R/(W)

Data Memory

Pages 24 to 31 (Block 3)

(Protection controlled by address 0A03h)

0400h to 04FFh

R/(W)

Data Memory

Pages 32 to 39 (Block 4)

(Protection controlled by address 0A04h)

0500h to 05FFh

R/(W)

Data Memory

Pages 40 to 47 (Block 5)

(Protection controlled by address 0A05h)

0600h to 06FFh

R/(W)

Data Memory

Pages 48 to 55 (Block 6)

(Protection controlled by address 0A06h)

0700h to 07FFh

R/(W)

Data Memory

Pages 56 to 63 (Block 7)

(Protection controlled by address 0A07h)

0800h to 08FFh

R/(W)

Data Memory

Pages 64 to 71 (Block 8)

(Protection controlled by address 0A08h)

0900h to 09FFh

R/(W)

Data Memory

Pages 72 to 79 (Block 9)

(Protection controlled by address 0A09h)

0A00h* to 0A09h*

R/(W)

Protection Control

Blocks 0 to 9

55h: Write protected; AAh: EPROM mode.

Address 0A00h is associated with Block 0,

address 0A01h with Block 1, etc.

0A0Ah to 0A1Dh

R/(W)

User EEPROM

(Protection controlled by address 0A1Fh)

0A1Eh*

R/(W)

Memory Block Lock

(See text)

0A1Fh*

R/(W)

Register Page Lock

(See text)

0A20h

R

Factory Byte

(55h  no valid manufacturer ID, AAh 

0A23h to 0A24h are a valid Manufacturer ID)

0A21h to 0A22h

R

Factory Trim Bytes

(Unspecified value)

0A23h to 0A24h

R

Manufacturer ID

Validity depends on factory byte

0A25h to 0A3Fh

R

Reserved

(Unspecified value)

* Once programmed to AAh or 55h this address becomes read-only. All other codes can be stored but neither write-protect the address nor

activate any function.