EVB-EMC2101 User Manual

3.8LED Indicators

LEDs indicate the status of the following signals (Table 3.1).

Table 3.1 LED Status Indicators

LED

SIGNAL

OFF

GREEN

 

RED

 

 

 

 

 

 

 

 

 

 

 

LED1

 

 

 

+3.3V power OFF

No

 

 

 

 

 

 

ALERT

ALERT

ALERT

 

 

 

 

 

 

 

LED2

 

+3.3V

+3.3V power OFF

+3.3V power ON

 

NA

 

 

 

 

 

 

LED3

Bridge Activity

NO Activity on

Activity on

 

NA

 

 

 

 

USB/SMBus Bridge

USB/SMBus Bridge

 

 

 

 

 

 

 

 

 

LED4

USB Activity

NO Activity on USB port

Activity on USB port

 

NA

 

 

 

 

 

 

LED5

EMC2101

U10 power OFF

U10 power ON

 

NA

 

 

Power

 

 

 

 

 

 

 

 

 

 

 

 

 

LED6

EMC2101-R

U11 power OFF

U11 power ON

 

NA

 

 

Power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.9Jumper Settings

This EVB has many jumper configurations to evaluate all of the features of the EMC2101.

3.9.1Device Power

To enable one of the 2 devices on the EVB, use jumpers J2 and J3. When a device is selected, the appropriate LED will light as shown in Table 3.1. Table 3.2 below summarizes the options. Note: only one device may be active at a time as both devices have the same SMBus address.

Table 3.2 Device Power

JUMPER

NAME

POSITION 1-2

POSITION 2-3

 

 

 

 

J2

EMC2101 POWER

U10 power ON

U10 power OFF

 

 

 

 

J3

EMC2101-R POWER

U11 power ON

U11 power OFF

 

 

 

 

3.9.2Fan Control

To adjust the fan control circuit one 3-way jumper is used. The two settings are DAC mode and PWM mode. The default setting is PWM which requires the fan to be connected to FAN CONN. 1 and the JP8 shorted from pin 1-2.

If the linear DAC mode is desired, several things need configured. First, JP8 must be shorted from pin 2-3 and the fan must be connected to FAN CONN. 2. Then, the device must be configured for linear operation via the ChipMan software. Consult the datasheet for these settings.Table 3.3.

Table 3.3 Fan Driver Configuration

FAN DRIVER

 

 

 

CONFIGURATION

JP8

 

FAN CONNECTOR

 

 

 

PWM

Position 1-2

P9

 

 

 

 

DAC

Position

2-3

P5

 

 

 

 

SMSC EMC2101

Revision 1.5 (12-13-06)

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