sc9s08mz16 Freescale Semiconductor, Inc, sc9s08mz16 Datasheet - Page 19

• Manufacturer Part Number: sc9s08mz16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Table 1-2
1.3
Some of the modules inside the MCU have clock source choices.
connection diagram. The ICG supplies the clock sources:
Freescale Semiconductor
•
ICGOUT is one of the following output options from the ICG module:
— The external crystal oscillator
— An external clock source
— The output of the digitally-controlled oscillator (DCO) in the frequency-locked loop
— Control bits inside the ICG determine which source is connected
ICG
System Clock Distribution
lists the functional versions of the on-chip modules.
sub-module
ICGERCLK
FFE
ICGOUT
ICGLCLK
1
2
3
4
ICGLCLK is the alternate BDC clock source for the SC9S08MZ16.
XCLK is the fixed-frequency clock.
ADC has min and max frequency requirements. See the Electricals appendix and the ADC chapter.
Flash has frequency requirements for program and erase operation. See the Electricals appendix.
1
CPU
÷2
CONTROL
SYSTEM
Analog-to-Digital Converter
Internal Clock Generator
Serial Communications Interface
Timer Pulse-Width Modulator
Central Processing Unit
LOGIC
÷2
Figure 1-2. System Clock Distribution Diagram
XCLK
SC9S08MZ16 MCU Data Sheet, Rev. 0 Draft C
Table 1-2. Versions of On-Chip Modules
COP
2
BUSCLK
1 kHz
Module
RTI
BDC
TPM1
TPMCLK
TPM3
(ADC)
(ICG)
(TPM)
(CPU)
(SCI)
TPM2
Figure 1-2
Version
2
1
4
4
3
ADC
SCI1
3
shows a simplified clock
SCI2
RAM
Chapter 1 Introduction
FLASH
4
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