mc9s08ac16 Freescale Semiconductor, Inc, mc9s08ac16 Datasheet - Page 22

• Manufacturer Part Number: mc9s08ac16
• Description: Hcs08 Microcontrollers 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 1 Introduction
Table 1-2
1.3
Some of the modules inside the MCU have clock source choices.
connection diagram. The ICG supplies the clock sources:
22
•
ICG
ICGOUT is an output of the ICG module. It is one of the following:
— The external crystal oscillator
— An external clock source
System Clock Distribution
lists the functional versions of the on-chip modules.
ICGERCLK
FFE
* ICGLCLK is the alternate BDC clock source for the MC9S08AC16 Series.
** XCLK is the fixed-frequency clock.
*** TPM3 is not available on S9S08AWxxA devices.
ICGLCLK*
ICGOUT
CPU
2
CONTROL
SYSTEM
LOGIC
2
Analog-to-Digital Converter
Internal Clock Generator
Inter-Integrated Circuit
Keyboard Interrupt
Serial Communications Interface
Serial Peripheral Interface
Timer Pulse-Width Modulator
Central Processing Unit
XCLK**
Figure 1-2. System Clock Distribution Diagram
COP
Figure 1-1. MC9S08AC16 Block Diagram
Table 1-2. Versions of On-Chip Modules
BUSCLK
MC9S08AC16 Series Data Sheet, Rev. 0
1 kHz
RTI
BDC
Module
PRELIMINARY
TPM1
TPMCLK
TPM3***
TPM2
(ADC)
(ICG)
(IIC)
(KBI)
(SCI)
(SPI)
(TPM)
(CPU)
IIC1
ADC has min and max
frequency requirements.
See the Electricals appendix
and the ADC chapter.
Figure 1-2
ADC1
Version
SCI1
1
4
2
1
4
3
3
2
shows a simplified clock
SCI2
RAM
Freescale Semiconductor
FLASH has frequency
requirements for program
and erase operation.
See the Electricals
appendix.
FLASH
SPI1