TNETX4080 Datasheet, PDF (58/64 Pages) Texas Instruments – ThunderSWITCH IIE 8-PORT 10-/100-MBIT/S ETHERNETE SWITCH

TNETX4080
ThunderSWITCH II^™ 8-PORT 10-/100-MBIT/S ETHERNET^™ SWITCH
SPWS050A – AUGUST 1998 – REVISED NOVEMBER 1998
LED interface
LED (see Figure 19)
NO.
1 tc(LED_CLK) Cycle time, LED_CLK
2 tw(LED_CLK) Pulse duration, LED_CLK high
3 tn(LED_CLK) Number of LED_CLK pulses in burst
4 tc(BURST)
Cycle time, LED_CLK burst
5 tsu(LED_DATA) Setup time, LED_DATA before LED_CLK↑
6 th(LED_DATA) Hold time, LED_DATA after LED_CLK↑
† _{During hard reset, LED_CLK runs continuously.}
‡ _{Does not apply during hard reset}
LED_CLK
1
6
2
5
4
3
MIN
MAX
8
4
24†
4687488‡
4
4
UNIT
tc
tc
tc
tc
tc
LED_DATA
First LED
Second LED
Figure 19. LED
Last LED
First LED
58
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265