參數(shù)資料
型號: 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): 103/122頁
文件大小: 914K
代理商: AM79C940KCW
AMD
103
Am79C940
AC WAVEFORMS
16235C-30
SCLK
(EDSEL = 1)
EOF
TDTREQ
43
42
Note 1
47
Note 3
Note 2
S3
S2
S1
S0
S2
S1
S3
S2
S1
S3
S0
S0
S2
S1
S3
S0
46
S3
S2
S1
S0
S2
S1
S3
S2
S1
S3
S0
S0
S2
S1
S3
S0
SCLK
(EDSEL = 0)
Notes:
1.
TDTREQ
will be asserted for two write cycles (4 SCLK cycles) minimum.
2.
TDTREQ
will deassert 1 SCLK cycle after
EOF
is detected (S2/S3 edge).
3. When
EOF
is written,
TDTREQ
will go inactive for 1 SCLK cycle minimum.
Host System Interface—
TDTREQ
Write Timing
16235C-31
XTAL1
STDCLK
TXDAT+
(Note 1)
DO+
DO–
DO±
53
0
1
1
0
1
1
1
TXEN
9
54
55
Note:
TXDAT+ is the internal version of the signal, and is shown for clarification only.
AUI Transmit Timing—Start of Packet
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