M5271EVB Freescale Semiconductor, M5271EVB Datasheet - Page 8

• Manufacturer Part Number: M5271EVB
• Description: BOARD EVAL FOR MCF5270/71
• Manufacturer: Freescale Semiconductor

Specifications of M5271EVB

• Processor To Be Evaluated: MCF5271
• Interface Type: RS-232, Ethernet
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Design Recommendations
5
5.1
5.2
8
•
•
•
•
Use a 4-layer printed circuit board with the VDD and GND pins connected directly to the power
and ground planes for the MCF5271.
See application note AN1259, System Design and Layout Techniques for Noise Reduction in
Processor-Based Systems.
Match the PC layout trace width and routing to match trace length to operating frequency and board
impedance. Add termination (series or therein) to the traces to dampen reflections. Increase the
PCB impedance (if possible) keeping the trace lengths balanced and short. Then do cross-talk
analysis to separate traces with significant parallelism or are otherwise "noisy". Use 6 mils trace
and separation. Clocks get extra separation and more precise balancing.
33 μF, 0.1 μF, and 0.01 μF across each power supply
Design Recommendations
Layout
Power Supply
1
2
Signal Name
PLL_TEST
Refers to pin’s primary function. All pins which are configurable for GPIO have a pullup enabled
in GPIO mode with the exception of PBUSCTL[7], PBUSCTL[4:0], PADDR, PBS, PSDRAM.
If JTAG_EN is asserted, these pins default to Alternate 1 (JTAG) functionality. The GPIO module
is not responsible for assigning these pins.
VDDPLL
VSSPLL
Table 2. MCF5270 and MCF5271 Signal Information and Muxing (continued)
OVDD
TEST
VDD
VSS
MCF5271 Integrated Microprocessor Hardware Specification, Rev. 4
GPIO
—
—
—
—
—
—
—
Alternate 1 Alternate 2 Dir.
—
—
—
—
—
—
—
Power Supplies
Test
—
—
—
—
—
—
—
I
I
I
I
I
I
I
1
1, 18, 32, 41, 55,
69, 81, 94, 105,
114, 128, 138,
17, 31, 40, 54,
67, 80, 88, 93,
104, 113, 127,
137, 144, 160
16, 53, 103
MCF5270
MCF5271
160 QFP
145
19
87
84
—
E5, E7, E10, F7,
A1, A14, E6, E9,
F6, F8, F10, G7,
D6, F11, G4, L4
F9, G6, G8, H7,
J10, K5, K6, K8
J9, K7, P1, P14
H8, H9, J6, J8,
G9, H6, J5, J7,
196 MAPBGA
MCF5270
MCF5271
M13
Freescale Semiconductor
L14
F5