AM79C971VCW Advanced Micro Devices, AM79C971VCW Datasheet - Page 221
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AM79C971VCW
Manufacturer Part Number
AM79C971VCW
Description
PCnet-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C971VCW.pdf
(265 pages)
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SWITCHING WAVEFORMS: ATTACHMENT UNIT INTERFACE
ISTDCLK
ITXDAT+
ISTDCLK
ITXDAT+
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
XTAL1
ITXEN
XTAL1
ITXEN
DO–
DO+
DO
DO+
DO–
DO
Note 1:
Internal signal and is shown for clarification only.
Note 1:
Internal signal and is shown for clarification only.
1
Figure 79. Transmit Timing - End of Frame (Last Bit = 0)
t x1
1
Bit (n–2)
Figure 78. Transmit Timing - Start of Frame
1
1
0
1
0
Bit (n–1)
Am79C971
1
0
0
t DOTR
0
Bit (n)
0
1
Typical > 200 ns
t
tx1H tx1HL
DOETD
t DOTF
tx1HF
tx1HR
1
20550D-82
20550D-81
221
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