TNETX4090
ThunderSWITCH II 9-PORT 100-/1000-MBIT/S ETHERNET SWITCH
SPWS044E ± DECEMBER 1997 ± REVISED AUGUST 1999
LED interface
LED (see Figure 29)
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| MIN | MAX | UNIT |
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1 | tc(LED_CLK) | Cycle time, LED_CLK |
| 8 | tc | ||||||||
2 | tw(LED_CLK) | Pulse duration, LED_CLK high |
| 4 | tc | ||||||||
3 | tn(LED_CLK) | Number of LED_CLK pulses in burst |
| 24² |
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4 | tc(BURST) | Cycle time, LED_CLK burst |
| 4687488³ | tc | ||||||||
5 |
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tsu(LED_DATA) |
| Setup time, LED_DATA before LED_CLK↑ |
| 4 | tc | ||||||||
6 |
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| Hold time, |
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| after LED_CLK↑ |
| 4 | tc | |
th(LED_DATA) |
| LED_DATA |
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²During hard reset, LED_CLK runs continuously. ³ Does not apply during hard reset
4
3
1
6
2
5
LED_CLK
LED_DATA
First LED
Second LED | Last LED | First LED |
Figure 29. LED
72 | POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
