MEC1404 Datasheet, PDF (298/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
19.0 RTOS TIMER
19.1 Introduction
The RTOS Timer is a low-power, 32-bit timer designed to operate on the 32kHz oscillator which is available during all
chip sleep states. This allows firmware the option to sleep the processor, enter heavy or deep chip sleep states, and
wake after a programmed amount of time. The timer may be used as a one-shot timer or a continuous timer. When the
timer transitions to 0 it is capable of generating a wake-capable interrupt to the embedded controller. This timer may be
halted during debug by hardware or via a software control bit.
19.2 References
No references have been cited for this chapter
19.3 Terminology
No terms have been cited for this chapter.
19.4 Interface
This block is an IP block designed to be incorporated into a chip. It is designed to be accessed internally via a registered
host interface. The following diagram illustrates the various interfaces to the block.
FIGURE 19-1:
RTOS TIMER INTERFACE DIAGRAM
Host Interface
Clocking and Resets
Interrupt Interface
Sleep Interface
Sideband Signals
RTOS Timer
19.4.1 HOST INTERFACE
The registers defined in Section 19.9, "RTOS Timer Registers," on page 302 are accessible by the Host Interfaces
defined in Table 19-6, “RTOS Timer Registers Base Address Table,” on page 302.
19.4.2 CLOCKING AND RESETS
This IP block has the following clocks and reset ports. For a complete list of all the clocks and resets associated with
this block see Section 19.5, "Power, Clocks and Resets," on page 300.
DS00001956D-page 298
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