MEC1322 Datasheet, PDF (278/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
24.0 TACH
24.1 Introduction
This block monitors TACH output signals (or locked rotor signals) from various types of fans, and determines their
speed.
24.2 References
No references have been cited for this feature.
24.3 Terminology
There is no terminology defined for this section.
24.4 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 24-1:
I/O DIAGRAM OF BLOCK
Host Interface
TACH
Power, Clocks and Reset
Signal Description
Interrupts
24.5 Signal Description
TABLE 24-1: SIGNAL DESCRIPTION TABLE
Name
Direction
Description
TACH INPUT
Input
Tachometer signal from TACHx Pin.
24.6 Host Interface
The registers defined for the TACH are accessible by the various hosts as indicated in Section 24.11, "EC-Only Regis-
ters".
DS00001719D-page 278
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