DS2401Z 데이터 시트보기 (PDF) - Maxim Integrated

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DS2401Z

Silicon Serial Number

Maxim Integrated 

READ/WRITE TIMING DIAGRAM (cont’d) Figure 6

Write-zero Time Slot

DS2401

Read-data Time Slot

60µs ≤ tLOW0 < tSLOT < 120µs

1µs ≤ tREC < ∞

RESISTOR

MASTER

DS2401

60µs ≤ tSLOT < 120µs

1µs ≤ tLOWR < 15µs

0 ≤ tRELEASE < 45µs

1µs ≤ tREC < ∞

tRDV = 15µs

tSU < 1µs

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 = x8 + x5 + x4 + 1. Additional information about

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.

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