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MC9S08GT16AMFBE Datasheet, PDF (276/300 Pages) Freescale Semiconductor, Inc – MC9S08GT16A/GT8A Features | |||
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Electrical Characteristics
1 Self-clocked mode frequency is the frequency that the DCO generates when the FLL is open-loop.
2 Loss of reference frequency is the reference frequency detected internally, which transitions the ICG into self-clocked
mode if it is not in the desired range.
3 Loss of DCO frequency is the DCO frequency detected internally, which transitions the ICG into FLL bypassed external
mode (if an external reference exists) if it is not in the desired range.
4 This parameter is characterized before qualiï¬cation rather than 100% tested.
5 Proper PC board layout procedures must be followed to achieve speciï¬cations.
6 This speciï¬cation applies to the period of time required for the FLL to lock after entering FLL engaged internal or external
modes. If a crystal/resonator is being used as the reference, this speciï¬cation assumes it is already running.
7 Jitter is the average deviation from the programmed frequency measured over the speciï¬ed interval at maximum fICGOUT.
Measurements are made with the device powered by ï¬ltered supplies and clocked by a stable external clock signal. Noise
injected into the FLL circuitry via VDDA and VSSA and variation in crystal oscillator frequency increase the CJitter
percentage for a given interval.
8 See Figure A-10
0.1
â60
â40
â20
0
â0.1
80
100
120
20
40
60
â0.2
â0.3
â0.4
2V
â0.5
3V
â0.6
TEMPERATURE (°C)
Figure A-10. Internal Oscillator Deviation from Trimmed Frequency
A.10 AC Characteristics
This section describes ac timing characteristics for each peripheral system. For detailed information about
how clocks for the bus are generated, see Chapter 9, âInternal Clock Generator (S08ICGV4).â
MC9S08GT16A/GT8A Data Sheet, Rev. 1
276
Freescale Semiconductor
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