IP101G-DS-R01 datasheet(52/65 Pages) ETC

52 / 65 page

IP101G

Data Sheet

52/65

January 14, 2014

IP101G-DS-R01

5.4 LED Mode Configuration

IP101G provides 2 LED operation modes,

LED Mode 1

(default):

Table 6 LED Mode 1 Function

LED

Function

LED0

Link status: Active indicates the link has established

LED1

Duplex operation: Active indicates full duplex

LED2

10BT/ACT: Active indicates 10Mbps connection has established, and blinking while

TX/RX events occur.

LED3

100BT/ACT: Active indicates 100Mbps connection has established, and blinking while

TX/RX events occur.

LED Mode 2

(could be set by pulling up pin CRS/LEDMOD with a 4.7K resistor):

Table 7 LED Mode 2 Function

LED

Function

LED0

Link/ACT: Active indicates the link has established, and blinking while TX/RX events

occur.

LED1

Duplex/COL: Active indicates full duplex, and blinking while collision events occur.

LED2

10BT: Active indicates 10Mbps connection has established

LED3

100BT: Active indicates 100Mbps connection has established

5.5 LED Blink Timing

Table 8 LED Blink Timing

LED mode

Blinking speed

Active LED blink

On 26ms -> Off 78ms -> On 26ms -> Off 78ms …

Collision LED blink

On 26ms -> Off 78ms -> On 26ms -> Off 78ms …

5.6 Repeater Mode

To enter Repeater mode, one can set 1 to bit 2 of Register 16 will allow IP101G to enter Repeater mode.

If IP101G is used in repeater, CRS will be high if IP101G is in a process of receiving packets. While

IP101G is used in a network interface card, CRS will be generated in both transmitting and receiving

packets.

5.7 Interrupt

IP101G provides 4 kinds of interrupt function: speed change, duplex change, link change and arbiter

state change. Interrupt masks could be selected by Reg 17, and an active low interrupt will be sent from

INTR or INTR_32 pin when event occurs.

5.8 Miscellaneous

ISET pin should be connected to GND via a 6.19K ohm resistor with 1% accuracy to ensure a correct

driving current for transmit DAC.

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