AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 226
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AM79C978
Manufacturer Part Number
AM79C978
Description
Single-Chip 1/10 Mbps PCI Home Networking Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C978.pdf
(261 pages)
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SWITCHING CHARACTERISTICS: BUS INTERFACE (CONCLUDED)
10BASE-T
Note: RX± pulses narrower than t
turn internal Carrier Sense off.
226
Symbol
t
PWKRD
t
TETD
Transmit End of Transmission
RX± Pulse Width Maintain/Turn Off Threshold
TX
RX
Parameter Description
V TSQ-
V TSQ+
Figure 54. 10 Mbps Transmit (TX±) Timing Diagram
Figure 55. 10 Mbps Receive (RX±) Timing Diagram
PWDRD
(min) will maintain internal Carrier Sense on. RX± pulses wider than t
t (PWKRD)
Am79C978
t PWKRD
|V
IN
Test Conditions
| > |V
THS
t (PWKRD)
| (Note 1)
t TETD
Min
250
136
Max
375
200
PWKRD
22206B-57
22206B-58
(max) will
Unit
ns
ns
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