DS2705K Maxim Integrated, DS2705K Datasheet - Page 5

• Manufacturer Part Number: DS2705K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2705r

DS2705EVKIT+
The user can left-click on the Randomize Challenge button to load a random challenge into the Challenge text
boxes. Left-clicking this button does not write the Challenge to the device. It is still required that the user left-click
on the Write and Copy buttons, described in the Memory Access section below, to write the Challenge to the
device.
The Response
The Response is the 20 byte message digest that is the result of the SHA-1 encryption algorithm. The Result is
stored in EEPROM of the DS2705. Each time an authentication attempt is made, the DS2705 sends the 8 byte
Challenge and then reads back the 20 byte Response. If the Response that is read back matches the Response
that is stored in EEPROM, the slave passes the authentication attempt.
The user can left-click on the Calculate Response button to calculate the Response that is to be expected based
on the Secret and Challenge text boxes. Left-clicking this button does not write the Response to the device. It is
still required that the user left-click on the Write and Copy buttons, described in the Memory Access section below,
to write the Response to the device.
The Configuration Register
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