DS2777K Maxim Integrated, DS2777K Datasheet - Page 5

• Manufacturer Part Number: DS2777K
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: DS2775, DS2776, DS2777, DS2778r

Figure 8. Tools Menu
Figure 9. SHA-1 Calculator
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DS2775–DS2778 Evaluation Kits
If the DS2775/DS2776 are found by the software, the
1-Wire speed of the device is detected and displayed.
To change the speed of the device, simply left-click on
Set Overdrive or Clear Overdrive from the
Communication menu (Figure 7). Selecting either
option sends the Clear Overdrive or Set Overdrive
command. The software sends the command in the
current 1-Wire speed, and then begins communicating
in the new 1-Wire speed.
If the D2777/DS2778 are found by the software, the
2-wire slave address is detected and displayed under
the Communication menu. If the software and the
DS2775–DS2778 get out of sync, simply left-click on
Detect Device to match the software’s communication
to the device.
The Tools menu (Figure 8) provides two methods to
evaluate the SHA-1 calculations: a method to view the
software-computed MAC and a method to view the
SHA-1 calculator. Left-clicking on the Show Software
Computed MAC menu item expands the main window
to show the MAC computed by the software.
Left-clicking on the Show SHA-1 Calculator menu
item opens a new window that allows the user to per-
form SHA-1 calculations independent of the DS2775–
DS2778 (Figure 9). Simply fill in the text boxes with the
desired values and left-click on the Compute MAC
with Software button. If the ROM ID is to be used in
computing the MAC, check the Use ROM ID? check-
box. Use the Fill with Values from Main Form option
from the Options menu to fill the Secret, ROM ID, and
Challenge text boxes with values from the main pro-
gram window.
The Preferences menu allows the user to change
COM port settings at any time (Figure 10). Edit
Preferences opens the Select Preferences window.
See the Selecting the Communication Port section for
more information.
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