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8 led indicators, Table 3.1 led status indicators, 9 jumper settings – SMSC EVB-EMC2101 User Manual

Page 9: 1 device power, Table 3.2 device power, 2 fan control, Table 3.3 fan driver configuration

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EVB-EMC2101 User Manual

SMSC EMC2101

Revision 1.5 (12-13-06)

9

3.8

LED Indicators

LEDs indicate the status of the following signals (

Table 3.1

).

3.9

Jumper Settings

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

3.9.1

Device 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.

3.9.2

Fan 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 3.1 LED Status Indicators

LED

SIGNAL

OFF

GREEN

RED

LED1

ALERT

+3.3V power OFF

No ALERT

ALERT

LED2

+3.3V

+3.3V power OFF

+3.3V power ON

NA

LED3

Bridge Activity

NO Activity on

USB/SMBus Bridge

Activity on

USB/SMBus Bridge

NA

LED4

USB Activity

NO Activity on USB port

Activity on USB port

NA

LED5

EMC2101

Power

U10 power OFF

U10 power ON

NA

LED6

EMC2101-R

Power

U11 power OFF

U11 power ON

NA

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

Table 3.3 Fan Driver Configuration

FAN DRIVER

CONFIGURATION

JP8

FAN CONNECTOR

PWM

Position 1-2

P9

DAC

Position 2-3

P5