Datasheet

Chapter 1 Device Overview
MC9S08LC60 Series Data Sheet: Technical Data, Rev. 4
Freescale Semiconductor 23
Table 1-3 lists the functional versions of the on-chip modules.
1.4 System Clock Distribution
Figure 1-2. System Clock Distribution Diagram
Some of the modules inside the MCU have clock source choices. Figure 1-2 shows a simplified clock
connection diagram. The ICG supplies the clock sources:
• ICGOUT is an output of the ICG module. It is one of the following:
— The external crystal oscillator
— An external clock source
— The output of the digitally-controlled oscillator (DCO) in the frequency-locked loop
sub-module
Table 1-3. Module Versions
Module Version
Analog Comparator (ACMP) 2
Analog-to-Digital Converter (ADC) 1
Internal Clock Generator (ICG) 4
Inter-Integrated Circuit (IIC) 1
Keyboard Interrupt (KBI) 2
Serial Communications Interface (SCI) 3
Serial Peripheral Interface (SPI) 3
Timer Pulse-Width Modulator (TPM) 2
Liquid Crystal Display Module (LCD) 1
Central Processing Unit (CPU) 2
TPMCLK
ADC has min and max
frequency requirements.
See Chapter 1, “Introduction”
and the Electricals Appendix.
FLASH has frequency
requirements for program
and erase operation.
See the Electricals Appendix.
* ICGLCLK is the alternate BDC clock source for the MC9S08LC60 Series.
TPM1 TPM2 IIC
SCI SPI1 SPI2
BDCCPU
ICG
ICGOUT
÷2
FFE
SYSTEM
LOGIC
BUSCLK
ICGLCLK*
CONTROL
FIXED FREQ CLOCK
ICGERCLK
÷2
ADC
RAM FLASH
LCD
ACMP
COP
1-kHz
(XCLK)
RTI