K60P100M100SF2RM Datasheet, PDF (585/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 26
RTC Oscillator
26.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
The RTC oscillator module provides the clock source for the RTC. The RTC oscillator
module, in conjunction with an external crystal, generates a reference clock for the RTC.
26.1.1 Features and Modes
The key features of the RTC oscillator are as follows:
• Supports 32 kHz crystals with very low power
• Consists of internal feed back resistor
• Consists of internal programmable capacitors as the Cload of the oscillator
• Automatic Gain Control (AGC) to optimize power consumption
The RTC oscillator operations are described in detail in Functional Description .
26.1.2 Block Diagram
The following is the block diagram of the RTC oscillator.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
585