Data Sheet

Ethernet Controller I210 — Programming Interface
572
8.27.3.28 jt_led_s[3:0] Function Control Register - Page 3, Register 16
Bits Field Mode HW Rst SW Rst Description
15:12 jt_led_s[3] Control R/W 0x1 Retain
If 16_3.11:10 is set to 11b then 16_3.15:12 has no effect.
0000b = On - fiber link, off - else.
0001b = On - link, blink - activity, off - no link.
0010b = On - link, blink - receive, off - no link.
0011b = On - activity, off - no activity.
0100b = Blink - activity, off - no activity.
0101b = Sync-E recovered clock.
0110b = On - 10 Mb/s or 1000 Mb/s master, off - else.
0111b = On - full duplex, off - half duplex.
1000b = Force off.
1001b = Force on.
1010b = Force hi-Z.
1011b = Force blink.
11xxb = Reserved.