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Part Name
Description
DS1982 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
DS1982
1Kb Add-Only iButton
Maxim Integrated
DS1982 Datasheet PDF : 24 Pages
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DS1982
HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL
Figure 2
BUS
MASTER
OTHER
DEVICES
COMMAND
LEVEL:
1-WIRE ROM FUNCTION
COMMANDS (SEE FIGURE 9)
DS 1982
AVAILABLE
COMMANDS:
READ ROM
MATCH ROM
SEARCH ROM
SKIP ROM
DATA FIELD
AFFECTED:
64-BIT ROM
64-BIT ROM
64-BIT ROM
N/A
DS1982-SPECIFIC
MEMORY FUNCTION
COMMANDS
(SEE FIGURE 6)
WRITE MEMORY
WRITE STATUS BYTE
READ MEMORY
READ STATUS BYTE
READ DATA/GENERATE
8-BIT CRC
1024-BIT EPROM
EPROM STATUS BYTES
1024-BIT EPROM
EPROM STATUS BYTES
1024-BIT EPROM
64-BIT LASERED ROM
Figure 3
8-Bit CRC Code
48- Bit Serial Number
8- Bit Family Code (09h)
MSB
LSB MSB
LSB MSB
LSB
1-WIRE CRC GENERATOR
Figure 4
Page 5 of 24
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