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HARDWARE
CPCI-824 User’s Manual 2-1
Revision 1.0, January 2006
CHAPTER 2
HARDWARE
2.1 AMCC POWERPC 440GX PROCESSOR
The AMCC PowerPC 440GX Embedded Processor is a member of AMCC’s PowerPC 400 family of
microprocessors. The 440GX on the CPCI-824 combines a powerful 667 MHz PowerPC core with
intelligent peripherals and is designed to optimize I/O processing tasks. The 440GX processor consoli-
dates into a single system:
• AMCC PowerPC core.
• 256 Kbyte L2 Cache.
•32 Kbyte Data and Instruction Caches.
•PCI-X interface.
•High-Performance Memory Controller
•Interrupt Controller with 18 external interrupt inputs.
•Four Direct Memory Access (DMA) Controllers.
•Two 10/100/1Gb Ethernet ports with TCP/IP acceleration hardware (TAH)
•Two 10/100Mb Ethernet ports.
•Messaging Unit
•External Bus Control (EBC) interface.
•Two I
2
C Bus Interface Units.
• Two 16750 compatible UARTS.
• Thirty two General Purpose Input Output (GXIO) ports.
For detailed descriptions of the 440GX, including programming information, consult the AMCC
PowerPC 440GX User’s Manual.
2.2 BYTE ORDERING
The CPCI-824 is configured to access external devices in big endian mode. The byte ordering determines
which memory location stores the least significant byte of the operand. Big endian stores the most sig-
nificant byte in the lowest address.