mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 23

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
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— 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.
FFE is a control signal generated inside the ICG. If the frequency of ICGOUT > 4 × the frequency
of ICGERCLK, this signal is a logic 1 and the fixed-frequency clock will be ICGERCLK/2.
Otherwise the fixed-frequency clock will be BUSCLK.
ICGLCLK — Development tools can select this internal self-clocked source (~ 8 MHz) to speed
up BDC communications in systems where the bus clock is slow.
ICGERCLK — External reference clock can be selected as the real-time interrupt clock source.
Can also be used as the ALTCLK input to the ADC module.
sub-module
MC9S08AC60 Series Data Sheet, Rev. 2
Chapter 1 Introduction
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