
56F801 Technical Data, Rev. 16
28
Freescale Semiconductor
3.5.5
Phase Locked Loop Timing
Table 3-10 PLL Timing
Operating Conditions:
V
SS
= V
SSA
= 0 V, V
DD
= V
DDA
= 3.0–3.6 V, T
A
= –40
°
to +85
°
C
Characteristic
Symbol
Min
Typ
Max
Unit
External reference crystal frequency for the PLL
1
1.
correctly. The PLL is optimized for 8MHz input crystal.
An externally supplied reference clock should be as free as possible from any phase jitter for the PLL to work
2.
User Manual. ZCLK = f
op
3.
Will not exceed 60MHz for the DSP56F801FA60 device.
ZCLK may not exceed 80MHz. For additional information on ZCLK and f
out
/2, please refer to the OCCS chapter in the
4.
This is the minimum time required after the PLL setup is changed to ensure reliable operation.
f
osc
4
8
10
MHz
PLL output frequency
2
f
out
/2
40
—
80
3
MHz
PLL stabilization time
4
0
o
to +85
o
C
t
plls
—
10
—
ms
PLL stabilization time
4
-40
o
to 0
o
C
t
plls
—
100
200
ms