RTL8208B-LF/RTL8208BF-LF
Datasheet
Bi-Color LED
For 3-bit Bi-color LED mode, Link/Act and Spd are used for one Bi-color LED package, which is a
single LED package with two LEDs connected in parallel and with opposite polarities.
Table 32. Bi-Color LED
Spd
0
0
Link/Act
Indication
No Link
100Mbps Link up
10Mbps Link up
Bi-Color State
Off
0
1
0
Green
Yellow
1
Yellow
Link/Act
Spd
Green
Figure 14. 3-Bit Bi-Color LED
7.9.2. Scan LED
The RTL8208B(F)-LF supports Scan LED display mode. The forms of LED status streams, as shown
below, are controlled by LEDMODE[1:0] pins, which are latched upon reset.
Table 33. Scan LED
LEDMODE[1:0]
Mode
Mode 0
Mode 1
SCAN_STATUS[2:0]
Col/Fulldup, Link/Act, Spd
Rx, Tx, Link
00
01
10
11
Mode 2 for Bi-color LED
Reserved
NC, Bi-color Link/Act/Spd, NC
Table 34. Scan LED Status
LED Status
Description
Link/Act
Link/Activity Indicator.
High for link established.
Blinks when the corresponding port is transmitting or receiving.
Link
Link Indicator.
High for link established.
Spd
Speed Indicator.
High for 100Mbps and low for 10Mbps.
Col/Fulldup
Collision/Full duplex Indicator.
High for full duplex, low for half duplex.
Blinks when collisions occur on the corresponding port.
Bi-Color LED Link, Activity, and Speed Indicator.
Its polarity depends on the Speed status.
Blinks when the corresponding port is transmitting or receiving.
High for receive activity.
Bi-Color
Link/Act/Spd
RX
TX
High for transmit activity.
Single-Chip Octal 10/100-TX/FX PHY Transceiver
41
Track ID: JATR-1076-21 Rev. 1.3
REALTEK [ Realtek Semiconductor Corp. ]
