MEC1404 Datasheet, PDF (376/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
27.0 PWM
27.1 Introduction
This block generates a PWM output that can be used to control 4-wire fans, blinking LEDs, and other similar devices.
Each PWM can generate an arbitrary duty cycle output at frequencies from less than 0.1 Hz to 24 MHz. The PWM con-
troller can also used to generate the PROCHOT output and Speaker output.
The PWMx Counter ON Time registers and PWMx Counter OFF Time registers determine the operation of the
PWM_OUTPUT signals. See Section 27.11.1, "PWMx Counter ON Time Register," on page 380 and Section 27.11.2,
"PWMx Counter OFF Time Register," on page 380 for a description of the PWM_OUTPUT signals.
27.2 References
There are no standards referenced in this chapter.
27.3 Terminology
There is no terminology defined for this section.
27.4 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 27-1:
I/O DIAGRAM OF BLOCK
Host Interface
Power, Clocks and Reset
PWM
Signal Description
Interrupts
There are no external signals for this block.
DS00001956D-page 376
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