gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 27

• Manufacturer Part Number: gwixp425bdt
• Description: Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
• Manufacturer: Intel Corporation

Figure 6.
2.2.1
Datasheet
Intel XScale
Super Pipeline
The super pipeline is composed of integer, multiply-accumulate (MAC), and memory pipes.
The integer pipe has seven stages:
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Intel
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
Integer Writeback
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Coprocessor Interface
®
Accumulate
Multiply
Core Block Diagram
IRQ
FIQ
Document Number: 252479, Revision: 005
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
U
M
M
U
March 2005
South
AHB
Bus
A9568-02
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