PPC440EP-3PBFFFCX datasheet(48/84 Pages) AMCC

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AMCC Proprietary

440EP – PPC440EP Embedded Processor

Revision 1.26 – April 25, 2007

Data Sheet

Signal Descriptions

The PPC440EP embedded controller is packaged in a 456-ball enhanced plastic ball grid array (E-PBGA). The

following tables describe the package level pinout.

In the table “Signal Functional Description” on page 50, each I/O signal is listed along with a short description of its

function. Active-low signals (for example, RAS) are marked with an overline. Please see “Signals Listed

Alphabetically” on page 17 for the pin (ball) number to which each signal is assigned.

Multiplexed Signals

Some signals are multiplexed on the same pin so that the pin can be used for different functions. In most cases,

the signal names shown in this table are not accompanied by signal names that may be multiplexed on the same

pin. If you need to know what, if any, signals are multiplexed with a particular signal, look up the name in “Signals

Listed Alphabetically” on page 17. It is expected that in any single application a particular pin will always be

programmed to serve the same function. The flexibility of multiplexing allows a single chip to offer a richer pin

selection than would otherwise be possible. The circuit type for multiplexed signals is shown as “Multiplex.” The

actual circuit type is the same as the primary signal.

Multipurpose Signals

In addition to multiplexing, some pins are also multi-purpose. For example, the EBC peripheral controller address

pins (PerAddr) are used as outputs by the PPC440EP to broadcast an address to external slave devices when the

PPC440EP has control of the external bus. When during the course of normal chip operation an external master

gains ownership of the external bus, these same pins are used as inputs which are driven by the external master

and received by the EBC in the PPC440EP. In this example, the pins are also bidirectional, serving both as inputs

and outputs.

Table 5. Pin Summary

Group

No. of Pins

Total Signal Pins

304

AVDD

SAVDD

SAGnd

AGnd

OVDD

SVDD

VDD

Gnd

Total Power Pins

152

Reserved

Total Pins

456

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