Freescale-semiconductor 56F8122 Bedienungsanleitung Seite 110

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56F8322 Techncial Data, Rev. 10.0
110 Freescale Semiconductor
Preliminary
10.6 Phase Locked Loop Timing
10.7 Oscillator Parameters
Table 10-14 PLL Timing
Characteristic Symbol Min Typ Max Unit
External reference crystal frequency for the PLL
1
1. An externally supplied reference clock should be as free as possible from any phase jitter for the PLL to work
correctly. The PLL is optimized for 8MHz input crystal.
f
osc
488MHz
PLL output frequency
2
(f
OUT
)—56F8322
2. ZCLK may not exceed 60MHz. For additional information on ZCLK and (f
OUT
/2), please refer to the OCCS chapter in the
56F8300 Peripheral User Manual.
f
op
160 260 MHz
PLL output frequency
2
(f
OUT
)—56F8122
f
op
160 160 MHz
PLL stabilization time
3
-40° to +125°C
3. This is the minimum time required after the PLL set up is changed to ensure reliable operation.
t
plls
—110ms
Table 10-15 Crystal Oscillator Parameters
Characteristic Symbol Min Typ Max Unit
Crystal Start-up time T
CS
4510ms
Resonator Start-up time T
RS
0.1 0.18 1 ms
Crystal ESR R
ESR
120 ohms
Crystal Peak-to-Peak Jitter T
D
70 250 ps
Crystal Min-Max Period Variation T
PV
0.12 1.5 ns
Resonator Peak-to-Peak Jitter T
RJ
300 ps
Resonator Min-Max Period Variation T
RP
300 ps
Bias Current, high-drive mode I
BIASH
250 290 µA
Bias Current, low-drive mode I
BIASL
80 110 µA
Quiescent Current, power-down mode I
PD
—0 1µA
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