5 phase lock loop electrical specifications, 5 phase lock loop electrical specifications -7, Refer to – Motorola ColdFire MCF5281 User Manual
Page 691: Table 33-8, Throug

Electrical Characteristics
Freescale Semiconductor
33-7
33.5
Phase Lock Loop Electrical Specifications
Table 33-8. PLL Electrical Specifications
(V
DD
and V
DDPLL
= 2.7 to 3.6 V, V
SS
= V
SSPLL
= 0 V)
Characteristic
Symbol
Min
Max
Unit
66MHz
80MHz
PLL Reference Frequency Range
Crystal reference
External reference
1:1 Mode
f
ref_crystal
f
ref_ext
f
ref_1:1
2
2
33.33
8.33
8.33
66.66
10.0
10.0
80
MHz
System Frequency
1
External Clock Mode
On-Chip PLL Frequency
1
All internal registers retain data at 0 Hz.
f
sys
0
f
ref
/ 32
f
sys(max)
66.66
66.66
f
sys(max)
80
80
MHz
Loss of Reference Frequency
2, 4
2
“Loss of Reference Frequency” is the reference frequency detected internally, which transitions the PLL into self
clocked mode.
f
LOR
100
1000
kHz
Self Clocked Mode Frequency
3, 4
3
Self clocked mode frequency is the frequency that the PLL operates at when the reference frequency falls below
f
LOR
with default MFD/RFD settings.
f
SCM
1
5
MHz
Crystal Start-up Time
4, 5
4
This parameter is characterized before qualification rather than 100% tested.
5
Proper PC board layout procedures must be followed to achieve specifications.
t
cst
—
10
ms
EXTAL Input High Voltage
Crystal Mode
All other modes (1:1, Bypass, External)
V
IHEXT
V
XTAL
+ 0.4
2.0
V
DD
V
DD
V
EXTAL Input Low Voltage
Crystal Mode
All other modes (1:1, Bypass, External)
V
ILEXT
V
SS
V
SS
V
XTAL
- 0.4
0.8
V
XTAL Output High Voltage
I
OH
= 1.0 mA
V
OL
V
DD
- 1.0
—
V
XTAL Output Low Voltage
I
OL
= 1.0 mA
V
OL
—
0.5
V
XTAL Load Capacitance
6
—
—
pF
PLL Lock Time
4,7
t
lpll
—
500
μ
s
Power-up To Lock Time
With Crystal Reference
Without Crystal Reference
t
lplk
—
—
10.5
500
ms
μ
s
1:1 Clock Skew (between CLKOUT and EXTAL)
9
t
skew
-2
2
ns
Duty Cycle of reference
4
t
dc
40
60
% f
sys
Frequency un-LOCK Range
f
UL
- 1.5
1.5
% f
sys
Frequency LOCK Range
fLCK
- 0.75
0.75
% % f
sys
CLKOUT Period Jitter
4, 5, 7, 10,11
, Measured at f
SYS
Max
Peak-to-peak (Clock edge to clock edge) — MCF521x
Peak-to-peak (Clock edge to clock edge) — MCF528x
Long Term Jitter (Averaged over 2 ms interval)
C
jitter
—
—
—
5
10
.01
% f
sys
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3