am79c940 Advanced Micro Devices, am79c940 Datasheet - Page 105
am79c940
Manufacturer Part Number
am79c940
Description
Media Access Controller For Ethernet Mace
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C940.pdf
(122 pages)
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57
40 mV
DO±
0 V
100 mV Max
80 Bit Times Max
16235C-34
AUI Transmit Timing—End Transmit Delimiter (ETD)
Bit Cell 1
Bit Cell 2
Bit Cell 3
Bit Cell 4
Bit Cell 5
1
0
1
0
1
0
(Note 1)
59
60
DI±
V ASQ
BCC
BCB
BCC
BCB
BCC
BCC
BCB
BCC
BCB
RXCRS
IVCO_ENABLE
IVCO
SRDCLK
5 Bit Times Max
SRD
(Note 2)
(Note 3)
16235C-35
Notes:
1. Minimum pulse width >45 ns with amplitude > –160 mV.
2. SRD first decoded bit might not be defined until bit time 5.
3. First valid data bit.
4. IVCO and VCO ENABLE are internal signals shown for clarification only.
AUI Receive Timing—Start of Packet
Am79C940
105