DS1996 Maxim, DS1996 Datasheet - Page 4

• Manufacturer Part Number: DS1996
• Description: The DS1996 Memory iButton is a rugged read/write data carrier that acts as a localized database that can be easily accessed with minimal hardware
• Manufacturer: Maxim

HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL Figure 2
64-BIT LASERED ROM Figure 3
1-WIRE CRC GENERATOR Figure 4
MASTER
BUS
MSB
8-Bit CRC Code
COMMAND
LEVEL:
COMMANDS (SEE FIGURE 9)
1-WIRE BUS
1-WIRE ROM FUNCTION
MEMORY FUNCTION
DS 1996- SPECIFIC
LSB
(SEE FIGURE 7)
COMMANDS
MSB
48-Bit Serial Number
4 of 19
AVAILABLE
READ ROM
MATCH ROM
SEARCH ROM
SKIP ROM
OVERDRIVE SKIP ROM
OVERDRIVE MATCH ROM
WRITE SCRATCHPAD
READ SCRATCHPAD
COPY SCRATCHPAD
READ MEMORY
COMMANDS:
DS 1996
LSB MSB
8-Bit Family Code (0CH)
N/A
64-BIT ROM
256-BIT SCRATCHPAD
256-BIT SCRATCHPAD
64K-BIT MEMORY
64K-BIT MEMORY
DATA FIELDS
AFFECTED:
64-BIT ROM
64-BIT ROM
64-BIT ROM
N/A
DEVICES
LSB
OTHER
DS1996