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AM79C940VCW 데이터시트(PDF) 102 Page - Advanced Micro Devices

부품명 AM79C940VCW
상세설명  Media Access Controller for Ethernet (MACE)
PDF  122 Pages
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제조업체  AMD [Advanced Micro Devices]
홈페이지  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C940VCW 데이터시트(HTML) 102 Page - Advanced Micro Devices

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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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