PRIXP425BB Intel, PRIXP425BB Datasheet - Page 24

• Manufacturer Part Number: PRIXP425BB
• Description: IC NETWRK PROCESSR 266MHZ 492BGA
• Manufacturer: Intel

Specifications of PRIXP425BB

• Processor Type: Network
• Features: XScale Core
• Speed: 266MHz
• Voltage: 1.3V
• Mounting Type: Surface Mount
• Package / Case: 492-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 869046

Intel
Functional Overview
Figure 5.
2.2.1
24
®
IXP42X Product Line and IXC1100 Control Plane Processor
Intel XScale
Super Pipeline
The super pipeline is composed of integer, multiply-accumulate (MAC), and memory pipes.
The integer pipe has seven stages:
•
•
•
•
•
•
•
•
•
•
Eight-entry write buffer allows the core to continue execution while data is written to memory
Multiple-accumulate coprocessor that can do two simultaneous, 16-bit, SIMD multiplies with
40-bit accumulation for efficient, high-quality media and signal processing
Performance monitoring unit (PMU) furnishing two 32-bit event counters and one 32-bit cycle
counter for analysis of hit rates, etc.
This PMU is for the Intel XScale core only. An additional PMU is supplied for monitoring of
internal bus performance.
JTAG debug unit that uses hardware break points and 256-entry trace history buffer (for
flow-change messages) to debug programs
Branch Target Buffer (BTB)/Fetch 1
Fetch 2
Decode
Register File/Shift
ALU Execute
State Execute
Coprocessor Interface
®
Accumulate
Multiply
Core Block Diagram
FIQ
IRQ
Interrupt
Request
Execution
Management
Core
Instruction
System
Address
Data
Data
Branch Target Cache
Instruction Cache
Mini-Data Cache
Data Cache
Debug/
32 KB
JTAG
PMU
32 KB
2 KB
M
M
M
M
U
U
South
AHB
Bus
Datasheet
A9568-02