PRIXP421BB 869740 Intel, PRIXP421BB 869740 Datasheet - Page 27
PRIXP421BB 869740
Manufacturer Part Number
PRIXP421BB 869740
Description
Manufacturer
Intel
Datasheet
1.PRIXP421BB_869740.pdf
(130 pages)
Specifications of PRIXP421BB 869740
Core Operating Frequency
533MHz
Package Type
BGA
Pin Count
492
Mounting
Surface Mount
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Operating Temperature Classification
Industrial
Lead Free Status / Rohs Status
Compliant
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Intel
Figure 6.
2.2.1
August 2006
Document Number: 252479-006US
®
IXP42X product line and IXC1100 control plane processors
Intel XScale
Super Pipeline
The super pipeline is composed of integer, multiply-accumulate (MAC), and memory
pipes.
The integer pipe has seven stages:
• 32-Kbyte instruction cache can hold entire programs, preventing processor stalls
• 32-Kbyte data cache reduces processor stalls caused by multi-cycle memory
• 2-Kbyte mini-data cache for frequently changing data streams avoids “thrashing”
• Four-entry fill-and-pend buffers to promote processor efficiency by allowing “hit-
• Eight-entry write buffer allows the processor to continue execution while data is
• Multiple-accumulate coprocessor that can do two simultaneous, 16-bit, SIMD
• Performance monitoring unit (PMU) furnishing two 32-bit event counters and one
• JTAG debug unit that uses hardware break points and 256-entry trace history
caused by multi-cycle memory accesses
accesses
of the D-cache
under-miss” operation with data caches
written to memory
multiplies with 40-bit accumulation for efficient, high-quality media and signal
processing
32-bit cycle counter for analysis of hit rates, etc.
This PMU is for the Intel XScale
monitoring of internal bus performance.
buffer (for flow-change messages) to debug programs
Coprocessor Interface
Accumulate
®
Multiply
IRQ
FIQ
Technology Block Diagram
Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Interrupt
Request
Execution
Management
Core
Instruction
System
Address
®
Data
Data
processor only. An additional PMU is supplied for
Branch Target Cache
Instruction Cache
Mini-Data Cache
Data Cache
Debug/
JTAG
32 KB
PMU
32 KB
2 KB
M
M
M
M
U
U
South
AHB
Bus
A9568-02
Datasheet
27
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