NXP Semiconductors K32 L2A Series, Reference Manual, Page: 1056 / 1379

• Can be selected as the clock source for the MCU system clocks
• 3 programmable post-dividers clock outputs, which can be used as clock sources
for other on-chip peripherals
• 2 Internal reference clock (IRC) generators:
• Fast IRC clock with programmable High and Low frequency range
• Fast clock can be used as a source for System PLL
• Either the slow or the fast clock can be selected as the clock source for the MCU
system clocks
• 3 programmable post-divider clock outputs for each IRC, which can be used as
clock sources for other on-chip peripherals
• System Crystal Oscillator:
• Can be used as a source for the System PLL
• Can be selected as the clock source for the MCU system clocks
• Clock monitor with reset and interrupt request capability for SPLL, SOSC, clocks
• Each of the clock sources have reference dividers for clocking on-chip modules and
peripherals, namely:
• SPLLDIV1_CLK / SPLLDIV2_CLK / SPLLDIV3_CLK
• FIRCDIV1_CLK / SCG_FIRCDIV2_CLK / SCG_FIRCDIV3_CLK
• SIRCDIV1_CLK / SIRCDIV2_CLK / SIRCDIV3_CLK
• SOSCDIV1_CLK / SOSCDIV2_CLK / SOSCDIV3_CLK
The next figure shows the SCG module block diagram.
Introduction
K32 L2A Reference Manual, Rev. 2, 01/2020
1056 NXP Semiconductors