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AM79C989JC Datasheet(PDF) 33 Page - Advanced Micro Devices

Part # AM79C989JC
Description  Quad Ethernet Switching Transceiver (QuEST??
PDF  37 Pages
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Manufacturer  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C989JC Datasheet(HTML) 33 Page - Advanced Micro Devices

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Am79C989
33
PRELIMINARY
Management Interface
Figure 3.
Management Interface Timing Diagram
MDIO
Write to Quest Device
Read from Quest Device
10
12
13
14
16
17
18
11
MDC
21173B-7
No.
Symbol
Parameter Description
Min
Max
Unit
10
tMII0
MDC Clock Period.
50
—
ns
11
tMII1
MDC high pulse.
20
—
ns
12
tMII2
MDC low pulse.
20
—
ns
13
tMII3
MDIO setup to rising edge of MDC.
10
—
ns
14
tMII4
MDIO hold from rising edge of MDC.
5
—
ns
16
tMII6
MDIO enable from rising edge of MDC.
0
20
ns
17
tMII7
MDIO valid from rising edge of MDC.
0
20
ns
18
tMII8
MDIO TRI-STATE® delay from rising edge of MDC.
0
20
ns



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