AN2127 Freescale Semiconductor / Motorola, AN2127 Datasheet - Page 7

• Manufacturer Part Number: AN2127
• Description: EMC Guidelines for MPC Based Automotive Powertrain Systems
• Manufacturer: Freescale Semiconductor / Motorola

Freescale Semiconductor, Inc.
balls should NOT be tied directly to the power plane, but instead should route up to the top layer and
over to the 10 nF capacitors. After routing to the 10 nF capacitors, a connection to the power plane
should be made with vias for each of the four areas.
The N
and Q
balls should be connected directly to the power plane and 10 10 nF capacitors
VDDL
VDDL
are used to decouple the power plane in their immediate vicinity. See
Figure 4
for additional details.
The remaining 10 nF capacitors should be connected to the power and ground planes and the capaci-
tors should be located as close as possible to the MCU. Also, the remaining capacitors should be evenly
distributed around the MCU.
All V
balls should be tied directly to the ground plane.
SS
EMC Guidelines for MPC500-Based Automotive Powertrain Systems
MOTOROLA
Rev. 0, 15 July 2001
7
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