MCF5270 FREESCALE [Freescale Semiconductor, Inc], MCF5270 Datasheet - Page 36

• Manufacturer Part Number: MCF5270
• Description: 32-bit Embedded Controller Division
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Preliminary Electrical Characteristics
8.4
36
NOTES:
1
2
3
4
5
6
Num
Oscillator and PLLMRFM Electrical Characteristics
All values given are initial design targets and subject to change.
All internal registers retain data at 0 Hz.
“Loss of Reference Frequency” is the reference frequency detected internally, which transitions the PLL
into self clocked mode.
Self clocked mode frequency is the frequency that the PLL operates at when the reference frequency falls
below f
This parameter is guaranteed by characterization before qualification rather than 100% tested.
Proper PC board layout procedures must be followed to achieve specifications.
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
LOR
PLL Reference Frequency Range
Core frequency
CLKOUT Frequency
Loss of Reference Frequency
Self Clocked Mode Frequency
Crystal Start-up Time
XTAL Load Capacitance
PLL Lock Time
Power-up To Lock Time
With Crystal Reference (includes 5 time)
Without Crystal Reference
1:1 Mode Clock Skew (between CLKOUT
and EXTAL)
Duty Cycle of reference
Frequency un-LOCK Range
Frequency LOCK Range
CLKOUT Period Jitter,
Measured at f
edge)
interval)
Frequency Modulation Range Limit
(f
ICO Frequency. f
sys/2
External reference
On-Chip PLL Frequency
Peak-to-peak Jitter (Clock edge to clock
Long Term Jitter (Averaged over 2 ms
Crystal reference
External reference
1:1 mode (NOTE: f
with default MFD/RFD settings.
Max must not be exceeded)
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 1.2
10
Table 29. HiP7 PLLMRFM Electrical Specifications
Characteristic
sys/2
5, 7,13
ico
Max
= f
2
sys/2
5, 6
ref *
5, 6, 8,11, 12
5
5
5, 6,8
= 2 × f
9
2
*
(MFD+2)
3, 5
4, 5
ref_1:1
13
,
14
)
15
f
Symbol
ref_crystal
f
f
ref_1:1
C
C
ref_ext
f
t
f
f
f
sys/2
f
SCM
t
skew
LOR
t
f
LCK
f
t
t
sys
lplk
cst
UL
jitter
mod
ico
lpll
dc
f
Value
ref
10.25
Min.
–1.7
100
–3.8
0.8
24
—
—
—
—
–1
40
—
—
48
8
8
0
5
/ 32
1
Value
15.25
Max.
1000
100
750
750
4.1
2.0
5.0
.01
2.2
25
25
50
50
50
10
30
11
60
75
1
Freescale Semiconductor
% f
% f
% f
%f
MHZ
MHz
MHz
MHz
MHz
MHz
Unit
kHz
ms
ms
pF
µs
µs
ns
%
sys/2
sys/2
sys/2
sys/2