mc9s08qd4 Freescale Semiconductor, Inc, mc9s08qd4 Datasheet - Page 20

• Manufacturer Part Number: mc9s08qd4
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 1 Device Overview
1.3
Figure 1-2
inputs as shown. The clock inputs to the modules indicate the clock(s) that are used to drive the module
function. All memory mapped registers associated with the modules are clocked with BUSCLK.
20
1
2
3
ICSLCLK is the alternate BDC clock source for the MC9S08QD4 series.
ADC has min. and max frequency requirements. See ADC chapter and
Flash has frequency requirements for program and erase operation.See
ICS
System Clock Distribution
shows a simplified clock connection diagram. Some modules in the MCU have selectable clock
ICSIRCLK
ICSFFCLK
ICSLCLK
ICSOUT
1
SYSTEM CONTROL LOGIC
Analog-to-Digital Converter
Central Processing Unit
Internal Clock Source
Keyboard Interrupt
Timer Pulse-Width Modulator
CPU
÷
Figure 1-2. System Clock Distribution Diagram
2
÷
2
Table 1-2. Versions of On-Chip Modules
MC9S08QD4 Series MCU Data Sheet, Rev. 3
COP
RTI
FIXED FREQ CLOCK (XCLK)
Module
BUSCLK
BDC
(ADC)
(CPU)
(ICS)
(KBI)
(TPM)
TCLK1
TPM1
Appendix A, “Electrical
Appendix A, “Electrical
TCLK2
TPM2
Version
ADC
1
2
1
2
2
2
Characteristics.”
Characteristics.”
Freescale Semiconductor
FLASH
3