am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 106
am79c974
Manufacturer Part Number
am79c974
Description
Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C974.pdf
(153 pages)
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AC SWITCHING WAVEFORMS
Attachment Unit Interface
Note:
1. Internal signal and is shown for clarification only.
Note:
1. Internal signal and is shown for clarification only.
106
ISTDCLK
ISTDCLK
ITXDAT+
ITXDAT+
AMD
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
XTAL1
XTAL1
ITXEN
ITXEN
DO+
DO–
DO
DO+
DO–
DO
1
1
t
XI
Bit (n–2)
1
Transmit Timing – End of Frame (Last Bit = 0)
1
0
Transmit Timing – Start of Frame
1
0
P R E L I M I N A R Y
Bit (n–1)
0
Am79C974
0
1
t
DOTR
Bit (n)
0
1
Typical > 200 ns
t
DOETD
t
X1H
t
DOTF
t
X1L
0
t
X1F
18681A-49
18681A-50
t
1
X1R
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