AX88850 Datasheet, PDF (24/39 Pages) ASIX Electronics Corporation – 100BASE-TX/FX Repeater Controller

AX88850
PRELIMINARY
3.11 LED Interface
AX88850 provides per-port LED status indication for partition, jabber, link/activity and support rate-based LED for
global utilization (%) and global collision frequency (%). Detail function is described on previous pin description
(LED interface). LED[7:0] are all active low.
3.11.1 LED Status Driver wave-form for AX88851
LED_SYN
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 ~ D15
LED[0] P0 J0 A0 C4 C0 P10 J10 A10 RID0 CC0
no useful phase
D0 D1 D2 D3
P0 J0 A0 C4
LED[1] P1 J1 A1 U4 C1 P11 J11 A11 RID1 CC1
no useful phase
P1 J1 A1 U4
LED[2] P2 J2 A2 A8 C2 P12 J12 A12 RID2 CC2
no useful phase
P2 J2 A2 A8
LED[3] P3 J3 A3 A9 C3 P13 J13 A13 RID3 CC3
no useful phase
P3 J3 A3 A9
LED[4] P4 J4 A4 J8 U0 P14 J14 A14 RID4 UU0
no useful phase
P4 J4 A4 J8
LED[5] P5 J5 A5 J9 U1 P15 J15 A15 "0" UU1
no useful phase
P5 J5 A5 J9
LED[6] P6 J6 A6 P8 U2 P16 J16 A16 CC4 UU2
no useful phase
P6 J6 A6 P8
LED[7] P7 J7 A7 P9 U3 P17 J17 A17 UU4 UU3
no useful phase
P7 J7 A7 P9
Note 1 :
a. P17~0 indicates partition status for each port
b. J17~0 indicates jabber status for each port
c. L17~0 indicates link status for each port
d. A17~0 indicates activity status for each port
e. RID4~0 is the ID number of repeater chip
f. The LED display support two estimations:C4~0 and CC4~0 which indicate global collision rate for
each 104.8ms sampling period. Users can choose any one presentation.
g. The LED display support two estimations:U4~0 and UU4~0 which indicate global utilization rate for
each 104.8ms sampling period. Users can choose any one presentation.
Note 2 : Reference port map as following table (Using per port Carrier Sense / Receive Signal Detect to identify port
number).
AX88851 Port[7:0] == M0_CRS[7:0] Port[9:8] == CRS[1:0]
Port[17:10] == M1_CRS[7:0]
AX88852 Port[3:0] == M0_CRS[3:0] Port[9:8] == CRS[1:0]
Port[7:4] == M1_CRS[3:0]
AX88853 Port[7:0] == RSD[7:0]
Port[9:8] == CRS[1:0]
AX88854 Reference to AX88851/AX88853 depended on MEDIA setting.
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ASIX ELECTRONICS CORPORATION