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What is the description for comparator and where to use it?

Latest Updated:12/01/2011

Question:

The uPD789166 Data Sheet has a description of the pin I/O circuits, and describes an N-ch open-drain output, and a 5V tolerant input buffer and comparator in type 13-X; but there is no description about the comparator.

Answer:

This comparator is used only for the SMB interface of the uPD789166Y, to check whether the SMB input signal is over the threshold or not.
The uPD789166 does not have an SMB interface.
Since no comparator is provided in the uPD789166, please ignore this.
Incidentally, this information is described in Figure 5-10 in the data sheet.
Suitable Products
UPD78916x