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10006024-04 Katana
®
752i User’s Manual
5-1
Section 5
System Controller
The Katana
®
752i processor complex consists of a processor (see Chapter ) and a system
controller/PCI bridge device with associated memory and input/output interfaces. This
chapter describes the Marvell MV64460 system controller/PCI bridge device implementa-
tion.
OVERVIEW
The Discovery
™
III PowerPC
®
System Controller (MV64460) from Marvell is an integrated
system controller with a PCI interface and communication ports for high performance con-
trol applications. The MV64460 has a five bus architecture:
• A 64-bit interface to the CPU bus
• A 64-bit interface to DDR SDRAM
• A 32-bit interface to devices
• Two PCI interfaces: The Katana
®
752i implementation uses a 32-bit interface for the
local PCI bus (PCI1) and a 32/64-bit interface for the CompactPCI bus (PCI0).
The five buses function independently which enables simultaneous operation of the CPU
bus, PCI device, and access to memory.
The MV64460 communications unit includes the following:
• Three Gigabit Ethernet ports
• Two multi-protocol serial controllers (MPSC)
• Ten serial DMAs (SDMA)
• Two baud rate generators (BRG)
•I
2
C interface
The crossbar fabric, or central routing unit, controls the data path routing. It contains pro-
grammable arbitration mechanisms to optimize device performance.