參數(shù)資料
型號: EWIXP455ABT
廠商: INTEL CORP
元件分類: 微控制器/微處理器
英文描述: 266 MHz, RISC PROCESSOR, PBGA544
封裝: LEAD FREE, PLASTIC, BGA-544
文件頁數(shù): 149/163頁
文件大?。?/td> 1123K
代理商: EWIXP455ABT
Package Information
May 2005
Intel IXP45X and Intel IXP46X Product Line of Network Processors Datasheet
86
Document Number: 306261-002
Table 24.
JTAG Interface
Name
Power
on
Reset
Normal
After
Reset
Until
Software
Enables
Normal
After
Software
Enables
Type
Description
JTG_TMS
H
VI / H
VI/H
I
Test mode select for the IEEE 1149.1 JTAG interface.
JTG_TDI
H
VI /H
VI/H
I
Input data for the IEEE 1149.1 JTAG interface.
JTG_TDO
Z
VO/Z
VO / Z
TRI
Output data for the IEEE 1149.1 JTAG interface.
JTG_TRST_N
H
VI/H
VI
I
Used to reset the IEEE 1149.1 JTAG interface.
Important:
The JTG_TRST_N signal must be asserted (driven low) during power-up, otherwise the TAP controller
will not be initialized properly and the processor may be locked.
When the JTAG interface is not being used, the signal must be pulled low using a 10-K
resistor.
JTG_TCK
Z
VI
I
Used as the clock for the IEEE 1149.1 JTAG interface.
NOTE:
This table discusses all features supported on the Intel IXP45X and Intel IXP46X Product Line of Network Processors. For details on feature support listed by processor,
For a legend of the Type codes, see Table 10 on page 46.
Table 25.
System Interface (Sheet 1 of 2)
Name
Power
on
Reset
Normal
After
Reset
Until
Software
Enables
Normal
After
Software
Enables
Type
Description
BYPASS_CLK
Z
VI
I
Used for test purposes only.
Must be pulled high using a 10-K
resistor for normal operation.
SCANTESTMODE_N
VI/H
VI / H
I
Used for test purposes only.
Must be pulled high using a 10-K
resistor for normal operation.
NOTE:
This table discusses all features supported on the Intel IXP45X and Intel IXP46X Product Line of Network Processors. For details on feature support listed by processor,
For a legend of the Type codes, see Table 10 on page 46.
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