mcf54455 Freescale Semiconductor, Inc, mcf54455 Datasheet - Page 5

• Manufacturer Part Number: mcf54455
• Description: 32-bit Microprocessor With Usb On-the-go, Ethernet, Pci, Ddr2/ddr Controller And Encryption
• Manufacturer: Freescale Semiconductor, Inc

2
3
3.1
To further enhance noise isolation, an external filter is strongly recommended for the analog V
VDD_RTC). The filter shown in
capacitors should be placed as close to the dedicated analog V
Do not implement the filter circuit using only capacitors. The analog power pins draw very little current. Concerns regarding
voltage loss across the 10-ohm resistor are not valid.
Freescale Semiconductor
Ordering Information
Hardware Design Considerations
Analog Power Filtering
MCF54451CVM180
MCF54452CVR200
MCF54453CVR200
MCF54454CVR200
MCF54455CVR200
MCF54450VM180
MCF54450VM240
MCF54451VM240
MCF54452VR266
MCF54453VR266
MCF54454VR266
MCF54455VR266
Freescale Part
Number
Board IV
Figure 2
DD
MCF5445x ColdFire
MCF54450 Microprocessor
MCF54451 Microprocessor
MCF54452 Microprocessor
MCF54453 Microprocessor
MCF54454 Microprocessor
MCF54455 Microprocessor
Figure 2. System Analog V
10 Ω
should be connected between the board IV
Description
Table 2. Orderable Part Numbers
10 µF
®
Microprocessor Data Sheet, Rev. 0
GND
DD
pin as possible. The 10-Ω resistor in the given filter is required.
256 MAPBGA
360 TEPBGA
Package
DD
0.1 µF
Power Filter
180 MHz
240 MHz
180 MHz
240 MHz
200 MHz
266 MHz
200 MHz
266 MHz
200 MHz
266 MHz
200 MHz
266 MHz
Speed
Analog V
DD
and the analog pins. The resistor and
DD
DD
Pin
–40
–40
–40
–40
–40
pins (VDD_A_PLL,
Temperature
0
0
0
0
0
0
°
°
°
°
°
°
°
°
°
°
°
to +70
to +70
to +70
to +70
to +70
to +70
to +85
to +85
to +85
to +85
to +85
Ordering Information
°
°
°
°
°
°
°
°
°
°
°
C
C
C
C
C
C
C
C
C
C
C
5