參數(shù)資料
型號(hào)： 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)： 135/163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
73
Document Number: 306261-002
ETHC_TXCLK
Z
VI
I
Externally supplied transmit clock.
25 MHz for 100 Mbps operation
2.5 MHz for 10 Mbps
This MAC contains hardware hashing capabilities local to the interface.
This signal should be pulled high through a 10-K
resistor when being utilized in SMII mode of
operation.
When this interface/signal is enabled and is not being used in a system design, the interface/
signal should be pulled high with a 10-K
resistor.
ETHC_TXDATA[3:1]
Z
0
VO
O
MII Mode of Operation:
Transmit data bus to PHY, asserted synchronously with respect to ETHC_TXCLK. This MAC
contains hardware hashing capabilities local to the interface.
SMII Mode of Operation:
Not used in SMII mode of operation.
ETHC_TXDATA[0] /
SMII_TXDATA[5]
Z
0
VO
O
MII Mode of Operation:
Transmit data bus to PHY, asserted synchronously with respect to ETHC_TXCLK. This MAC
contains hardware hashing capabilities local to the interface.
SMII Mode of Operation:
The data on this signal is transmitted synchronously with respect to the rising edge of SMII_CLK
when operating as an SMII interface and synchronously with respect to the rising edge of
SMII_TXCLK when operating as a Source Synchronous SMII interface
ETHC_TXEN
Z
0
VO
O
Indicates that the PHY is being presented with nibbles on the MII interface. Asserted
synchronously, with respect to ETHC_TXCLK, at the first nibble of the preamble, and remains
asserted until all the nibbles of a frame are presented. This MAC contains hardware hashing
capabilities local to the interface.
Table 16.
MII/SMII Interfaces (Sheet 6 of 8)
Name
Power
on
Reset
Normal
After
Reset
Until
Software
Enables
Normal
After
Software
Enables
Type
Description
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,
see Table 1 on page 14.
For a legend of the Type codes, see Table 10 on page 46.
Please refer to Intel
IXP45X and Intel IXP46X Product Line of Network Processors Developer’s Manual for information on how to select the interface desired
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