MCF5480 Freescale Semiconductor, Inc, MCF5480 Datasheet - Page 6

• Manufacturer Part Number: MCF5480
• Description: Mcf548x Coldfire Microprocessor
• Manufacturer: Freescale Semiconductor, Inc

Hardware Design Considerations
4
4.1
To further enhance noise isolation, an external filter is strongly recommended for PLL analog V
Figure 2
close to the dedicated PLL V
4.2
Figure 3
(IV
6
1
2
3
USB PLL operation voltage range
Input high voltage SSTL 3.3V/2.5V
Input low voltage SSTL 3.3V/2.5V
Input high voltage 3.3V I/O pins
Input low voltage 3.3V I/O pins
Output high voltage I
Output low voltage I
Capacitance
Input leakage current
DD
IV
example circuit. There are three PLL V
This specification is guaranteed by design and is not 100% tested.
Capacitance C
).
DD
should be connected between the board V
shows situations in sequencing the I/O V
and PLL V
Hardware Design Considerations
PLL Power Filtering
Supply Voltage Sequencing and Separation Cautions
3
, V
in
IN
DD
= 0 V, f = 1 MHz
is periodically sampled rather than 100% tested.
OL
OH
should be at the same voltage. PLL V
Characteristic
= 8 mA, 16 mA,24 mA
= 8 mA, 16 mA,24 mA
Board V
DD
pin as possible.
Table 4. DC Electrical Specifications (continued)
DD
2
2
MCF548x ColdFire
Figure 2. System PLL V
DD
10 Ω
inputs. A filter circuit should used on each PLL V
5
DD
DD
(EV
and the PLL V
10 µF
DD
GND
®
), SDRAM V
DD
Microprocessor, Rev. 4
USB_PLLV
should have a filtered input. Please see
Symbol
V
DD
V
C
V
V
V
V
I
DD
OH
OL
in
IH
IH
IN
IL
IL
Power Filter
pins. The resistor and capacitors should be placed as
DD
0.1 µF
DD
(SD V
0.7 x EV
V
DD
V
V
REF
SS
SS
1.43
–1.0
Min
), PLL V
2.4
PLL V
—
—
- 0.3
- 0.3
+ 0.3
DD
DD
DD
DD
Pin
DD
input.
SD V
(PLL V
0.35 x EV
pins. The filter shown in
EV
V
Freescale Semiconductor
REF
DD
Max
1.58
TBD
DD
0.5
1.0
Figure 2
—
- 0.3
+ 0.3
DD
+ 0.3
DD
), and Core V
for an
Units
μA
pF
V
V
V
V
V
V
V
DD