MC9S08FL8CLC Description
The MC9S08FL16 series uses ICS module as the clock source. The ICS module can use internal or external clock sources as a reference to provide CPU clocks up to 20 MHz. The output of the ICS module includes the OSCOUT-XOSC output that provides an external reference clock to the ADC. The ICSFFCLK-ICS fixed frequency clock reference (about 32.768 KHz) provides double fixed lock signals for TPM and MTIM16. The ICSOUT-ICS CPU clock provides twice as much bus clock as the base clock of the peripheral. The ICSLCLK- standby BDC clock provides a debug signal to the BDC module. The TCLK pin is an additional external clock source. When TCLK is enabled, a backup clock source can be provided for TPM and MTIM16. The 1 kHz clock on chip provides the clock source for the COP module.
MC9S08FL8CLC Features
8-Bit S08 Central Processor Unit (CPU)
? Up to 20 MHz CPU at 4.5 V to 5.5 V across
temperature range of –40 °C to 85 °C
? HC08 instruction set with added BGND instruction
? Support for up to 32 interrupt/reset sources
On-Chip Memory
? Up to 16 KB flash read/program/erase over full
operating voltage and temperature
? Up to 1024-byte random-access memory (RAM)
? Security circuitry to prevent unauthorized access
to RAM and flash contents
Power-Saving Modes
? Two low power stop modes; reduced power wait
mode
? Allows clocks to remain enabled to specific
peripherals in stop3 mode
Clock Source Options
? Oscillator (XOSC) — Loop-control Pierce
oscillator; crystal or ceramic resonator range of
31.25 kHz to 39.0625 kHz or 1 MHz to 16 MHz
? Internal Clock Source (ICS) — Internal clock
source module containing a
frequency-locked-loop (FLL) controlled by internal
or external reference; precision trimming of
internal reference allows 0.2% resolution and 2%
deviation over temperature and voltage; supports
bus frequencies up to 10 MHz
System Protection
? Watchdog computer operating properly (COP)
reset with option to run from dedicated 1 kHz
internal clock source or bus clock
? Low-voltage detectionwith reset or interrupt;
selectable trip points
? Illegal opcode detection with reset
MC9S08FL8CLC Applications
TPM and MTIM16
