Revision 2.03 – September 7, 2007
405GP – Power PC 405GP Embedded Processor
Data Sheet
Signal List
The following table provides a summary of the number of package pins associated with each functional interface
group.
Pin Summary
No. of Pins
Group
413-Ball package
456-Ball Package
25 mm
60
35 mm
60
27mm
60
18
71
96
9
PCI
Ethernet
18
18
SDRAM
71
71
External peripheral
External master
Internal peripheral
Interrupts
96
96
9
9
15
15
15
7
7
7
JTAG
5
5
5
System
19
19
19
300
24
Total Signal Pins
OVDD
300
38
300
32
VDD
22
26
24
60
36
4
24
56
Gnd
Thermal (and Gnd)
Reserved
15
36
12
16
Total Pins
413
456
456
Multiplexed Pins
In the table “Signal Functional Description” on page 35, each external signal is listed along with a description of the
signal function. Some signals are multiplexed on the same pin (ball) so that the pin can be used for different
functions. Multiplexed signals are shown as a default signal with a secondary signal in square brackets (for
example, GPIO1[TS1E]). Active-low signals (for example, RAS) are marked with an overline.
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.
In addition to multiplexing, many pins are also multi-purpose. For example, the EBC peripheral controller address
pins are used as outputs by the PPC405GP to broadcast an address to external slave devices when the
PPC405GP 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 PPC405GP. In this example, the pins are also bidirectional, serving as both inputs
and outputs.
Intialization Strapping
One group of pins is used as strapped inputs during system reset. These pins function as strapped inputs only
during reset and are used for other functions during normal operation (see “Strapping” on page 55). Note that the
use of these pins for strapping is not considered multiplexing since the strapping function is not programmable.
AMCC
33
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
