User Manual
91
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
System Control Unit - Digital Modules (SCU-DM)
7.3.3
Phase-Locked Loop (PLL) Module
This section describes the TLE984xQX PLL module.
The clock
f
PLL
is generated in one of the following PLL configured modes:
• Prescaler Mode, also called VCO Bypass Mode
• Normal Mode
• Freerunning Mode
7.3.3.1
Features
Following is an overview of the PLL features/functions:
• Programmable clock generation PLL
• Loop filter
• Wide range of input frequencies (divided by configurable P divider)
• Wide VCO frequency tunning range
• VCO lock detection
• Oscillator run detection
• 4-bit VCO output frequency feedback divider
N
• 2-bit VCO output frequency divider
K2
and 1-bit output divider
K1
• Oscillator Watchdog
• Prescaler Mode
• Freerunning Mode
• Normal Mode
• Sleep Mode automatically activated during device power-save mode
• Glitchless switching between both K-Dividers
• Glitchless switching between Normal Mode and Prescaler Mode
• Internal Oscillator for oscillator watchdog
• Internal Oscillator as clock source
7.3.3.2
PLL Functional Description
The following figure shows the PLL block structure.