1. Introduction
14
Functional Blocks
The following topics provide overviews of the ZT 5504's main features, some of which are
shown in the functional block diagram below.
Functional Block Diagram
Serial
Port
Status
LEDs
Reset
Video
Ethernet B
10BASE-T/
100BASE-TX
PMC
SITE
PMC Slot
USB 0
Battery
Real-Time Clock
ECC
SDRAM
(512 Mbyte or
1 Gbyte)
Keyboard
Controller
Power
Controller
Baseboard
Management
Controller
Backplane I/O
440GX
AGPset
SVGA
Video
USB 1
Ethernet A
10BASE-T/
100BASE-TX
Pentium III
Processor
L1 and L2
Cache
(PCI-to-PCI Bridge)
Interface
IDE
HARD
DRIVE
Floppy Disk
Controller
Serial
Number
Temp.
Sensor
Watchdog
Timer
BGA2
Flash
Memory
(BIOS)
CompactPCI/PSB Architecture
The ZT 5504 is designed to operate in a CompactPCI Packet Switching Backplane
(CompactPCI/PSB) system. The CompactPCI/PSB specification is an extension to the PICMG
2.x family of specifications that overlays a packet-based switching architecture on top of
CompactPCI to create an Embedded System Area Network (ESAN). CompactPCI/PSB
supplements the robust, reliable and hot-swap capable CompactPCI architecture with the
easily integrated, low-cost, high-performance, and extensible Ethernet.
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