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AM79C940VCW Folha de dados(PDF) 73 Page - Advanced Micro Devices

Nome de Peças AM79C940VCW
Descrição Electrónicos  Media Access Controller for Ethernet (MACE)
PDF  122 Pages
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Fabricante Electrônico  AMD [Advanced Micro Devices]
Página de início  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C940VCW Folha de dados(HTML) 73 Page - Advanced Micro Devices

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AMD
73
Am79C940
Loopback Functions
Loop [1–0]
Function
00
No Loopback
01
External Loopback
10
Internal Loopback, excludes
MENDEC
11
Internal Loopback, includes
MENDEC
External
loopback
allow
the
MACE device to transmit to the
physical medium, using either
the AUI, 10BASE-T, DAI or GPSI
port,
dependent
on
the
PORTSEL [1–0] bits in the PLS
Configuration Control register.
Using the internal loopback test
will ensure that transmission
does not disturb the physical me-
dium and will prohibit frame re-
ception from the network. One
Internal loopback function in-
cludes the MENDEC in the loop.
Bit 0
RES
Reserved. Read as zero. Always
write as zero.
Reserved Test Register 1 (RTR1)
(REG ADDR 30)
Reserved for AMD internal use only.
Reserved Test Register 2 (RTR2)
(REG ADDR 31)
Reserved for AMD internal use only.



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