mcf5274l Freescale Semiconductor, Inc, mcf5274l Datasheet - Page 51

• Manufacturer Part Number: mcf5274l
• Description: Mcf5275 Integrated Microprocessor Family Hardware
• Manufacturer: Freescale Semiconductor, Inc

10.5 Oscillator and Phase Lock Loop (PLLMRFM) Electrical
Freescale Semiconductor
3
4
5
6
7
8
PLL Reference Frequency Range
Core frequency
CLKOUT Frequency
Loss of Reference Frequency
Self Clocked Mode Frequency
Crystal Start-up Time
EXTAL Input High Voltage
EXTAL Input Low Voltage
XTAL Output High Voltage
XTAL Output Low Voltage
XTAL Load Capacitance
PLL Lock Time
Power-up To Lock Time
With Crystal Reference
Without Crystal Reference
1:1 Mode Clock Skew (between CLKOUT and EXTAL)
Duty Cycle of reference
This parameter is characterized before qualification rather than 100% tested.
pF load ratings are based on DC loading and are provided as an indication of driver strength. High speed interfaces
require transmission line analysis to determine proper drive strength and termination.
Current measured at maximum system clock frequency, all modules active, and default drive strength with matching
load.
All functional non-supply pins are internally clamped to V
Input must be current limited to the value specified. To determine the value of the required current-limiting resistor,
calculate resistance values for positive and negative clamp voltages, then use the larger of the two values.
Power supply must maintain regulation within operating V
current conditions. If positive injection current (V
and could result in external power supply going out of regulation. Insure external V
than maximum injection current. This will be the greatest risk when the MCU is not consuming power. Examples are: if
no system clock is present, or if clock rate is very low which would reduce overall power consumption. Also, at
power-up, system clock is not present during the power-up sequence until the PLL has attained lock.
Crystal reference
External reference
1:1 Mode (NOTE: f
External reference
On-Chip PLL Frequency
Crystal Mode
All other modes (Dual Controller (1:1), Bypass, External)
Crystal Mode
All other modes (Dual Controller (1:1), Bypass, External)
I
I
OH
OL
= 1.0 mA
= 1.0 mA
Specifications
8
MCF5275 Integrated Microprocessor Family Hardware Specification, Rev. 1.1
sys/2
2
5, 6
Characteristic
6, 9
5
7
= 2 u f
10
3, 5
4, 5
ref_1:1
Table 47. PLL Electrical Specifications
)
in
> V
Preliminary
DD
11
) is greater than I
SS
DD
and their respective V
range during instantaneous and operating maximum
f
Symbol
ref_crystal
V
V
V
V
f
f
ref_ext
ref_1:1
f
f
t
f
f
V
V
sys/2
IHEXT
IHEXT
SCM
ILEXT
ILEXT
t
skew
LOR
t
core
t
t
lplk
cst
lpll
OH
dc
OL
DD
, the injection current may flow out of V
1
f
ref
Preliminary Electrical Characteristics
TBD
TBD
TBD
TBD
TBD
TBD
DD
Min
100
DD
24
40
—
—
—
—
—
-1
8
8
0
5
/ 32
.
load will shunt current greater
1000
TBD
TBD
TBD
TBD
TBD
TBD
Max
166
750
750
25
25
83
83
83
10
30
11
60
—
1
% f
MHz
MHz
MHZ
MHz
MHz
Unit
kHz
ms
ms
pF
Ps
Ps
ns
V
V
V
V
sys/2
DD
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