參數(shù)資料
型號: AM79C940VCW
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, PQFP80
封裝: TQFP-80
文件頁數(shù): 102/122頁
文件大小: 914K
代理商: AM79C940VCW
AMD
102
Am79C940
AC WAVEFORMS
16235C-28
34
Word N
Word N+1
Last Byte
or Word
41
32
42
31
S3
S2
S1
S0
TH
TL
S0
S2
S1
S3
S1
S0
W1
W0
W1
W0
S2
S3
S0
W1
W0
SCLK
(EDSEL = 1)
R/
W
DTV
EOF
DBUS[15:0]
ADD[4:0]
BE0-1
TC
= 0
33
48
49
37
34
43
38
S3
S2
S1
S0
TH
TL
S0
S2
S1
S3
S1
S0
W1
W0
W1
W0
S2
S3
S0
W1
W0
SCLK
(EDSEL = 0)
CS
Host System Interface—3-Cycle Transmit FIFO/Register Write Timing
16235C-29
EOF
RDTREQ
39
44
SCLK
(EDSEL = 1)
S0
S2
S1
S3
S2
S1
S0
S2
S1
S3
S0
S0
S3
S2
45
Note 1
40
SCLK
(EDSEL = 0)
S0
S2
S1
S3
S2
S1
S0
S2
S1
S3
S0
S0
S3
S2
Note:
Once the host detects the
EOF
output active from the MACE device (S2/S3 edge), if no other receive packet exists in
the RCVFIFO which meets the assert conditions for
RDTREQ
, the MACE device will deassert
RDTREQ
within 4 SCLK cycles
(S0/S1 edge). This is consistent for both 2 or 3 cycle read operations.
Host System Interface—
RDTREQ
Read Timing
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AM79C940 Media Access Controller for Ethernet (MACE)
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