MPC8280 Motorola, MPC8280 Datasheet - Page 56

• Manufacturer Part Number: MPC8280
• Description: PowerQUICC II Family Hardware Specifications
• Manufacturer: Motorola

6
7
Symbols used in Table 20 are described in Table 21.
8.2
The following figures and table represent the alternate 516 PBGA package. For information on the standard
package for the MPC8280 and the MPC8270, refer to Section 8.1, “ZU Package—MPC8280 and
MPC8270” on page 41.
Figure 15 shows the pinout of the VR and ZQ packages as viewed from the top surface.
56
OVERBAR
UTM
UTS
UT8
UT16
MII
RMII
GNDSYN (AB1): This pin exists as a separate ground signal in MPC826x(A) devices; it does not exist as a separate
XFC (AB2) pin: This pin is used in MPC826x(A) devices; it is not used in MPC8280 because there is no need for
ground signal on the MPC8280. New designs must connect AB1 to GND and follow the suggestions in Section 4.3,
“Layout Practices.” Old designs in which the MPC8280 is used as a drop-in replacement can leave the pin connected
to GND with the noise filtering capacitors.
external capacitor to operate the PLL. New designs should connect AB2 (XFC) pin to GND. Old designs in which the
MPC8280 is used as a drop-in replacement can leave the pin connected to the current capacitor.
Symbol
VR and ZQ Packages—MPC8275 and MPC8270
Signals with overbars, such as TA, are active low.
Indicates that a signal is part of the UTOPIA master interface.
Indicates that a signal is part of the UTOPIA slave interface.
Indicates that a signal is part of the 8-bit UTOPIA interface.
Indicates that a signal is part of the 16-bit UTOPIA interface.
Indicates that a signal is part of the media independent interface.
Indicates that a signal is part of the reduced media independent interface.
MPC8280 PowerQUICC II™ Family Hardware Specifications
Table 21. Symbol Legend
Meaning
MOTOROLA