MEC1404 Datasheet, PDF (368/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
26.0 TACHOMETER
26.1 Introduction
This block monitors tachometer output signals (or locked rotor signals) from various types of fans, and determines their
speed.
26.2 References
No references have been cited for this feature.
26.3 Terminology
There is no terminology defined for this section.
26.4 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 26-1:
I/O DIAGRAM OF BLOCK
Host Interface
Tachometer
Power, Clocks and Reset
Signal Description
Interrupts
26.5 Signal Description
TABLE 26-1: SIGNAL DESCRIPTION TABLE
Name
TACHx
Direction
Input
Description
Tachometer input signal.
Note: ‘x’ represents the instance number (i.e., TACH0, TACH1, etc.). If there is only one tachometer input this may
be omitted from the pin signal name.
DS00001956D-page 368
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