DS1982 Maxim, DS1982 Datasheet - Page 5

• Manufacturer Part Number: DS1982
• Description: The DS1982 1Kb Add-Only iButton is a rugged read/write data carrier that identifies and stores relevant information about the product or person to which it is attached
• Manufacturer: Maxim

HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL Figure 2
64-BIT LASERED ROM Figure 3
MSB
1-WIRE CRC GENERATOR Figure 4
MASTER
BUS
8-Bit CRC Code
COMMAND
LEVEL:
COMMANDS (SEE FIGURE 9)
MEMORY FUNCTION
1-WIRE ROM FUNCTION
DS1982-SPECIFIC
(SEE FIGURE 6)
COMMANDS
LSB MSB
48- Bit Serial Number
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AVAILABLE
COMMANDS:
READ ROM
MATCH ROM
SEARCH ROM
SKIP ROM
WRITE MEMORY
WRITE STATUS BYTE
READ MEMORY
READ STATUS BYTE
READ DATA/GENERATE
8-BIT CRC
DS 1982
LSB MSB
8- Bit Family Code (09h)
DATA FIELD
AFFECTED:
64-BIT ROM
64-BIT ROM
64-BIT ROM
N/A
1024-BIT EPROM
EPROM STATUS BYTES
1024-BIT EPROM
EPROM STATUS BYTES
1024-BIT EPROM
OTHER
DEVICES
DS1982
LSB