DS2401-SL MAXIM [Maxim Integrated Products], DS2401-SL Datasheet - Page 8

• Manufacturer Part Number: DS2401-SL
• Description: Silicon Serial Number Unique, Factory-Lasered and Tested 64-Bit
• Manufacturer: MAXIM [Maxim Integrated Products]

READ/WRITE TIMING DIAGRAM (cont’d) Figure 6
Write-zero Time Slot
Read-data Time Slot
CRC GENERATION
To validate the data transmitted from the DS2401, the bus master may generate a C RC value from the
data as it is received. This generated value is compared to the value stored in the last 8 bi ts of the
DS2401. If the two CRC values match, the transmission is error-free.
The equivalent polynomial function of this CRC is: CRC = x
the Maxim 1-Wire CRC is available in Application Note 27.
CUSTOM DS2401
Customization of a portion of the unique 48-bit serial number by the customer is available. Maxim will
register and assign a specific customer ID in the 12 most significant bits of the 48-bit field. The next most
significant bits are selectable by the customer as a starting value, and the least significant bits are non-
selectable and will be automatically incremented by one. Certain quantities and conditions apply for these
custom parts. Contact your Maxim sales representative for more information.
RESISTOR
MASTER
DS2401
60µs ≤ t
1µs ≤ t
60µs ≤ t
1µs ≤ t
0 ≤ t
1µs ≤ t
t
t
RDV
SU
< 1µs
RELEASE
= 15µs
8 of 11
REC
LOWR
REC
LOW0
SLOT
< ∞
< ∞
< 45µs
< 15µs
< 120µs
< t
SLOT
8
+ x
< 120µs
5
+ x
4
+ 1. Additional information about