參數(shù)資料
型號(hào): AM79C940KCW
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: Media Access Controller for Ethernet (MACE)
中文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP10
封裝: PLASTIC, QFP-100
文件頁數(shù): 73/122頁
文件大?。?/td> 914K
代理商: AM79C940KCW
AMD
73
Am79C940
Loopback Functions
Loop [1–0]
00
01
10
Function
No Loopback
External Loopback
Internal Loopback, excludes
MENDEC
Internal Loopback, includes
MENDEC
11
External loopback allow the
MACE device to transmit to the
physical medium, using either
the AUI, 10BASE-T, DAI or GPSI
port,
dependent
PORTSEL [1–0] bits in the PLS
on
the
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.
Reserved. Read as zero. Always
write as zero.
Bit 0
RES
Reserved Test Register 1 (RTR1)
Reserved for AMD internal use only.
(REG ADDR 30)
Reserved Test Register 2 (RTR2)
Reserved for AMD internal use only.
(REG ADDR 31)
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