Datasheet
DS28E04-100: 4096-Bit 1-Wire Addressable EEPROM with PIO
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Figure 5. Memory Map
Address locations 0000h to 021Fh are nonvolatile. Address locations 0220h to 0225 are volatile.
ADDRESS RANGE TYPE DESCRIPTION PROTECTION CODES (NOTES)
0000h to 001Fh R/(W) Data Memory Page 0 (Protection controlled by address 0200h)
0020h to 003Fh R/(W) Data Memory Page 1 (Protection controlled by address 0201h)
0040h to 005Fh R/(W) Data Memory Page 2 (Protection controlled by address 0202h)
0060h to 007Fh R/(W) Data Memory Page 3 (Protection controlled by address 0203h)
0080h to 009Fh R/(W) Data Memory Page 4 (Protection controlled by address 0204h)
00A0h to 00BFh R/(W) Data Memory Page 5 (Protection controlled by address 0205h)
00C0h to 0DFh R/(W) Data Memory Page 6 (Protection controlled by address 0206h)
00E0h to 00FFh R/(W) Data Memory Page 7 (Protection controlled by address 0207h)
0100h to 011Fh R/(W) Data Memory Page 8 (Protection controlled by address 0208h)
0120h to 013Fh R/(W) Data Memory Page 9 (Protection controlled by address 0209h)
0140h to 015Fh R/(W) Data Memory Page 10 (Protection controlled by address 020Ah)
0160h to 017Fh R/(W) Data Memory Page 11 (Protection controlled by address 020Bh)
0180h to 019Fh R/(W) Data Memory Page 12 (Protection controlled by address 020Ch)
01A0h to 01BFh R/(W) Data Memory Page 13 (Protection controlled by address 020Dh)
01C0h to 01DFh R/(W) Data Memory Page 14 (Protection controlled by address 020Eh)
01E0h to 01FFh R/(W) Data Memory Page 15 (Protection controlled by address 020Fh)
0200h
1)
to 020Fh
1)
R/(W)
Protection Control Pages 0
to 15
55h: Write Protected; AAh: EPROM mode.
Address 0200h is associated with memory
page 0, address 0201h with page 1, etc.
0210h
1)
R/(W) Register Page Lock (See text)
0211h R Factory Byte (Reads 55h or AAh)
0212h to 021Dh N/A Reserved
021Eh to 021Fh R Factory Bytes (Undefined value)
220h R PIO Logic State (The lower two bits are valid)
221h R PIO Output Latch State (The lower two bits are valid)
222h R PIO Activity Latch State (The lower two bits are valid)
223h R/W
2)
Conditional Search PIO
Selection Mask
224h R/W
2)
Conditional Search Polarity
Selection
225h R/W
2)
Conditional Search Control
and Status Register
1)
Once programmed to AAh or 55h this address becomes read-only. All other codes can be stored but will neither
write-protect the address nor activate any function.
2)
Limited write access through Write Register command