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AM79C976 Datasheet(PDF) 281 Page - Advanced Micro Devices

Part # AM79C976
Description  PCnet-PRO??10/100 Mbps PCI Ethernet Controller
PDF  309 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C976 Datasheet(HTML) 281 Page - Advanced Micro Devices

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8/01/00
Am79C976
281
P R E L I M INARY
SWITCHING CHARACTERISTICS: EXTERNAL ADDRESS DETECTION
INTERFACE
Note:
1. May need to delay RX_CLK to capture Start Frame Byte Delimiter (SFBD) at 100 Mbps operation.
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Parameter
Symbol
Parameter Name
Test Condition
Min
Max
Unit
External Address Detection Interface: External PHY - MII @ 25 MHz
tEAD7
SFBD change from
” RX_CLK
0
20 (Note 1) ns
tEAD8
EAR deassertion to
’ RX_DV (first
rising edge)
40
ns
tEAD9
EAR assertion after SFD event
(frame rejection)
0
5,080
ns
tEAD10
EAR assertion width
50
ns
External Address Detection Interface: External PHY - MII @ 2.5 MHz
tEAD11
EAR deassertion to
’ RX_DV (first
rising edge)
400
ns
tEAD12
EAR assertion after SFD event
(frame rejection)
0
50,800
ns
tEAD13
EAR assertion width
500
ns
Receive Frame Tag Timing with Media Independent Interface
tEAD14
RXFRTGE assertion from
’SFBD
(first rising edge)
0
ns
tEAD15
RXFRTGE, RXFRTGD setup to
’
RX_CLK
10
ns
tEAD16
RXFRTGE, RXFRTGD hold from
’
RX_CLK
10
ns
tEAD17
RXFRTGE deassertion to
” RX_DV
RX_CLK @25 MHz
RX_CLK @2.5 MHz
40
400
ns
ns
RX_CLK
RXD[3:0]
RX_DV
EAR
Preamble
SF/BD
SFD
DA
DA
DA
tEAD8
tEAD7
tEAD9
tEAD10
22929B65
SFBD



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