参数资料
型号: EWIXP455ABT
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 266 MHz, RISC PROCESSOR, PBGA544
封装: LEAD FREE, PLASTIC, BGA-544
文件页数: 86/163页
文件大小: 1123K
代理商: EWIXP455ABT
Functional Overview
Intel IXP45X and Intel IXP46X Product Line of Network Processors Datasheet
May 2005
Document Number: 306261-002
29
GPIO Pin 15 can be configured the same as GPIO Pin 13 or as a clock output. The output-clock
configuration can be set at various speeds, up to 33 MHz, with various duty cycles. GPIO Pin 15 is
configured as an output, upon reset. GPIO Pin 15 can be used to clock the expansion interface, after
reset.
Several other GPIO pins can serve as an alternate function, as outlined in Table 5.
3.1.13
Internal Bus Performance Monitoring Unit (IBPMU)
The IXP45X/IXP46X network processors contain a performance monitoring unit that may be used
to capture predefined events within the system outside of the Intel XScale core. These features aid
in measuring and monitoring various system parameters that contribute to the overall performance
of the processor.
The Performance Monitoring (PMON) facility provided comprises:
Eight Programmable Event Counters (PECx)
Previous Master/Slave Register
Event Selection Multiplexor
The programmable event counters are 27 bits wide. Each counter may be programmed to observe
one event from a defined set of events. An event consists of a set of parameters which define a start
condition and a stop condition.
The monitored events are selected by programming the Event Select Registers (ESR).
3.1.14
Interrupt Controller
The IXP45X/IXP46X network processors implement up to 64 interrupt sources to allow an
extension of the Intel XScale core’s FIQ and IRQ interrupt sources. These sources can originate
from some external GPIO pins, internal peripheral interfaces, or internal logic.
Table 5.
GPIO Alternate Function Table
GPIO Pin Number
Alternate Function
0
External USB 1.1 Device Clock
1
External USB 2.0 Host Clock
2
NPE A External Condition 0
3
NPE A External Condition 1
4
NPE B External Condition 4
5
NPE B External Condition 5
6
NPE C External Condition 2
7
Auxiliary IEEE1588 Master Snapshot
8
Auxiliary IEEE1588 Slave Snapshot
9:13
(Reserved)
14
Output Clock 14
15
Output Clock 15
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