DS28EC20 Maxim, DS28EC20 Datasheet - Page 9

• Manufacturer Part Number: DS28EC20
• Description: The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each
• Manufacturer: Maxim

Figure 5. Memory Map
* 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.
ADDRESS RANGE
0A00h* to 0A09h*
0A0Ah to 0A1Dh
0A21h to 0A22h
0A23h to 0A24h
0A25h to 0A3Fh
0000h to 00FFh
0100h to 01FFh
0200h to 02FFh
0300h to 03FFh
0400h to 04FFh
0500h to 05FFh
0600h to 06FFh
0700h to 07FFh
0800h to 08FFh
0900h to 09FFh
0A1Eh*
0A1Fh*
0A20h
TYPE
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R
R
R
R
Data Memory
Pages 0 to 7 (Block 0)
Data Memory
Pages 8 to 15 (Block 1)
Data Memory
Pages 16 to 23 (Block 2)
Data Memory
Pages 24 to 31 (Block 3)
Data Memory
Pages 32 to 39 (Block 4)
Data Memory
Pages 40 to 47 (Block 5)
Data Memory
Pages 48 to 55 (Block 6)
Data Memory
Pages 56 to 63 (Block 7)
Data Memory
Pages 64 to 71 (Block 8)
Data Memory
Pages 72 to 79 (Block 9)
Protection Control
Blocks 0 to 9
User EEPROM
Memory Block Lock
Register Page Lock
Factory Byte
Factory Trim Bytes
Manufacturer ID
Reserved
DESCRIPTION
9 of 27
(Protection controlled by address 0A00h)
(Protection controlled by address 0A01h)
(Protection controlled by address 0A02h)
(Protection controlled by address 0A03h)
(Protection controlled by address 0A04h)
(Protection controlled by address 0A05h)
(Protection controlled by address 0A06h)
(Protection controlled by address 0A07h)
(Protection controlled by address 0A08h)
(Protection controlled by address 0A09h)
55h: Write protected; AAh: EPROM mode.
Address 0A00h is associated with Block 0,
address 0A01h with Block 1, etc.
(Protection controlled by address 0A1Fh)
(See text)
(See text)
(55h  no valid manufacturer ID, AAh 
0A23h to 0A24h are a valid Manufacturer ID)
(Unspecified value)
Validity depends on factory byte
(Unspecified value)
PROTECTION CODES (NOTES)
DS28EC20: 20Kb 1-Wire EEPROM