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TNETX3150 数据表(PDF) 101 Page - Texas Instruments

部件名 TNETX3150
功能描述  ThunderSWITCHE 15-PORT 10-/100-MBIT/S ETHERNETE SWITCH
PDF  113 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TNETX3150 数据表(HTML) 101 Page - Texas Instruments

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TNETX3150/TNETX3150A
ThunderSWITCH™ 15-PORT 10-/100-MBIT/S ETHERNET™ SWITCH
SPWS027F – FEBRUARY 1997 – REVISED SEPTEMBER 1997
101
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
LED timing (see Figure 42)
300 ns
600 ns
300 ns
LEDCLK
(output)
LEDSTR0
(output)
LEDDATA
(output)
600 ns
Port
00
Port
01
Port
02
Port
03
Port
04
Port
12
Port
13
Port
14
Reserved
a) LED-STATUS INTERFACE
300 ns
600 ns
300 ns
LEDCLK
(output)
LEDSTR1
(output)
LEDDATA
(output)
600 ns
Port
00
Port
01
Port
02
Port
03
Port
04
Port
12
Port
13
Port
14
Reserved
b) TRANSMIT-QUEUE-STATUS INTERFACE
Port
05
Port
06
Port
07
Port
08
Port
09
Port
10
Port
11
Port
05
Port
06
Port
07
Port
08
Port
09
Port
10
Port
11
Figure 42. LED- and Transmit-Queue-Status Interface Timing
The LEDSTR1 signal is pulsed only when there has been a change in status for any of the transmit queues.
An external system monitoring this signal can use it as a trigger to investigate which transmit queue is congested
or has recovered from congestion.
During hardware reset, the TNETX3150/TNETX3150A turns on the LEDs attached to it to indicate that the
TNETX3150/TNETX3150A is in reset. The LEDCLK is free running, LEDSTR0 and LEDSTR1 are held high,
and LEDDATA is taken low.
With LEDSTR0 and LEDSTR1 high, the LED latch is transparent and the LEDs are illuminated.
When RESET is released, a normal LED cycle is initiated with LEDDATA held low and LEDSTR0 pulsed. The
LEDs remain on until the start bit is set (an LED cycle updating LEDSTR1 is not performed).
When the START option bit is set, the TNETX3150/TNETX3150A initiates another LED cycle with LEDDATA
held high, extinguishing the LEDs.



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