am79c989 Advanced Micro Devices, am79c989 Datasheet - Page 35

• Manufacturer Part Number: am79c989
• Description: Quad Ethernet Switching Transceiver
• Manufacturer: Advanced Micro Devices

Attachment Unit Interface (AUI)
No.
30
31
32
33
34
Symbol
t
t
t
t
t
DOETD
PWODI
PWKDI
PWOCI
PWKCI
(DO+) – (DO–)
(DI+) – (DI–)
(CI+) – (CI–)
VASQ
VASQ
DI Pulse Width Accept/Reject Threshold.
DI Pulse Width Maintain/Turn-Off Threshold.
CI Pulse Width Accept/Reject Threshold.
CI Pulse Width Maintain/Turn-Off Threshold.
DO End of Transmission Delimiter.
30
32
Figure 5. AUI Timing Diagram
Parameter Description
P R E L I M I N A R Y
33
31
Am79C989
100 mV
34
80 Bit Times
40 mV
Min
136
275
15
10
90
Max
200
160
375
45
26
21173B-9
Unit
ns
ns
ns
ns
ns
35