mc9s08sv8 Freescale Semiconductor, Inc, mc9s08sv8 Datasheet - Page 4

• Manufacturer Part Number: mc9s08sv8
• Description: 8-bit Hcs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

System Clock Distribution
2
MC9S08SV16 series use ICS module as clock sources. The ICS module can use internal or external clock
source as reference to provide up to 40 MHz CPU clock. The output of ICS module includes,
The TCLK pin is an extra external clock source. When TCLK is enabled, it can provide alternate clock
source to TPMs and MTIM16. The on-chip 1 kHz clock can provide clock source of RTC and COP
modules.
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EXTAL XTAL
OSCOUT— XOSC output provides EXTAL reference clock to ADC and RTC.
ICSIRCLK — ICS internal clock reference provides clock source of RTC.
ICSFFCLK — ICS fixed frequency clock reference (around 32.768 kHz) provides double of the
fixed lock signal to TPMs and MTIM16.
ICSOUT — ICS CPU clock provides double of bus clock which is basic clock reference of
peripherals.
ICSLCLK — Alternate BDC clock provides debug signal to BDC module.
1 kHz
XOSC
System Clock Distribution
ICS
OSCOUT
ICSIRCLK
ICSFFCLK
ICSOUT
ICSLCLK
CPU
Figure 2. System Clock Distribution Diagram
MC9S08SV16 Series Data Sheet, Rev. 2
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2
2
FIXED CLOCK (XCLK)
RTC
SCI
COP
BDC
FLASH
TPM2
TPM1
RAM
TCLK
MTIM16
SPI
Freescale Semiconductor
ADC
IIC
BUS CLOCK
IPC