RTL8152B-VB

Datasheet

Integrated 10/100M Ethernet Controller for USB Applications

8

Track ID: JATR-8275-15

Rev. 1.0

6.2. Customizable LED Configuration

The RTL8152B-VB supports customizable LED operation modes via OCP register offset 0xDD90h.

Table 10 describes the different LED actions.

Table 10.

LED Select

Bit

Symbol

RW

Description

7:4

LEDSEL1

RW

LED Select for PINLED1

3:0

LEDSEL0

RW

LED Select for PINLED0

Configure OCP register offset 0xDD90h to support your own LED signals. For example, if the value in

the OCP offset 0xDD90 is 0xA1h (10100001b), the LED actions are:

• LED 0: On only in 10M mode, with no blinking during TX/RX

• LED 1: On only in 100M mode, with TX/RX blinking

Table 11.

Customized LEDs

LINK

ACT

Speed

Link 10M

Link 100M

-

LED 0

Bit 0

Bit 1

Bit 3

LED 1

Bit 4

Bit 5

Bit 7

Table 12.

LED Feature Control-1

Feature Control

Bit12

Bit13

Bit14

Bit15

0

LED0 Low Active

LED1 Low Active

RSVD

Indicates Option 1 of Table 14

is selected

1

LED0 High Active

LED1 High Active

RSVD

Indicates Option 2 of Table 14

is selected

Table 13.

LED Feature Control-2

LED Pin

ACT=0

ACT=1

LINK=0

Floating

All Speed ACT

LINK>0

Selected Speed LINK

Option 1 (see Table 14): Selected Speed LINK+ Selected Speed ACT

Option 2 (see Table 14): Selected Speed LINK+ All Speed ACT

Note 1: ACT means blinking TX and RX. LINK indicates Link 10M and Link 100M.

Note 2: There is a special mode: LED OFF Mode

Set all bits to 0.