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10006024-04 Katana
®
752i User’s Manual
4-1
Section 4
Processor
The Katana
®
752i processor complex consists of a processor and a system controller/PCI
bridge device (see Chapter ) with associated memory and input/output interfaces. The pro-
cessor complex supports soldered and socketed user Flash memory, DDR SDRAM, an EIA-
232 serial console port, and three 10/100/1000BaseT Ethernet ports.
PROCESSOR OVERVIEW
This chapter provides an overview of the processor logic on the Katana
®
752i. It includes
information on the CPU, exception handling, and cache memory. The Katana
®
752i utilizes
the IBM PowerPC
™
750GL microprocessor. For more detailed information, please refer to
the following IBM document: PowerPC
™
Microprocessor Family: The Bus Interface for 32-Bit
Microprocessors.
Features
The following table outlines some of the key features for the 750GL CPU.
Table 4-1: Katana
®
752i CPU Features
The following block diagram provides an overview of the IBM 750GL architecture.
Category: 750GL Key Features:
Instruction Set 32-bit
CPU Speed (internal) Up to 1GHz
Data Bus 64-bit
Address Bus 32-bit
Four stage pipeline control Fetch, dispatch/decode, execute,
complete/write back
Cache (L1) 32KB Instruction, 32KB Data, 8-way set
associative
Cache (L2) 1MB, 4-way set associative, ECC checking
Execution Units Branch Processing, Dispatch, Decode,
Load/Store, Fixed-point, Floating-point,
System
Dual issue superscalar
control
Maximum of two instructions completed plus
one branch folded per cycle
Voltages Internal, 1.5V; input/output, 2.5V