MC9S08GB60 Datasheet, PDF (22/290 Pages) Motorola, Inc – Microcontrollers

Chapter 1 Introduction
• 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 the ICGERCLK.
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.
MC9S08GB/GT Data Sheet, Rev. 2.3
22
Freescale Semiconductor