am79c940 Advanced Micro Devices, am79c940 Datasheet - Page 105

• Manufacturer Part Number: am79c940
• Description: Media Access Controller For Ethernet Mace
• Manufacturer: Advanced Micro Devices

AMD
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