Protogate Freeway 3414, Hardware Maintenance Manual, Page: 23 / 72

1: Introduction
DC 900-2031A 23
1.7.2 PCI/PCIe Bus Interface
The Freeway’s PCI bus architecture is based on a 32-bit data path and 32-bit address-
ing. There are 3 PCIe slots that are 1X compatible to support ICP2432Be cards.
1.7.3 LAN Interface
The Freeway has two 10/100/1000 Ethernet ports on the CPU board. Optionally, addi-
tional Ethernet ports (copper or fiber) may be added to the system.
1.7.4 Serial I/O
The Freeway has a single (9-pin) serial I/O port that is compatible with standard COM1
PC ports. This port is used as the Freeway console
1.8 WAN Processors (ICP Boards)
The Freeway uses Protogate’s ICP2432B Intelligent Communications Processor. The
ICPs are programmable, front-end I/O boards for the PCI or PCIe bus that provide
high-speed data communications processing, off-loading low-level tasks that are tradi-
tionally performed on the host CPU.
The ICP2432B CPU is a Coldfire 5407 processor. It includes:
•
32-bit address and 32-bit data bus structures
•
Pipelined architecture with a high degree of internal parallelism
•
32 megabytes of main memory operating at zero wait state
The ICP2432B has a console port for debugging purposes that is provided by an
integrated USART within the 5407 processor. The port supports asynchronous transmit
and receive data at 9600 bits/second.
The ICP2432B (PCI bus) is available in three versions that support the following elec-
trical interfaces:
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