SMSC EVB-EMC14 Series Bedienungsanleitung

SMSC EMC140X/2X 1 Revision 1.0 (12-14-06)

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EVB-EMC14XX User Manual

Revision 1.0 (12-14-06) SMSC EMC140X/2X

1 Overview

The EMC140X series of devices are SMBus temperature sensors with THERM and ALERT outputs.

The EMC142X series of devices have Hardware Thermal Shutdown outputs in place of THERM. The

EMC1402 and EMC1422 each monitor one internal diode and one externally connected temperature

diode.The EMC1403 and EMC1423 each monitor one internal diode and two externally connected

temperature diodes. And finally, the EMC1404 and EMC1424 each monitor one internal diode and up

to three externally connected temperature diodes.

All of the modes and functions of the EMC140X/2X can be tested and observed with the EVB-

EMC14XX. The EVB-EMC14XX is a USB-based platform for evaluating all variations of the

EMC140X/2X. A block diagram of this EVB is shown in Figure 1.1.

1.1 Related Documents

The CD included with the evaluation board contains the following documents:

nEvaluation Board Checklist

nBill Of Materials

nSchematic

nJumper Settings and Connector List

nDatasheets

nChip Manager Application

nChip Manager Register Definition Files (EMC1402.xml, EMC1403.xml, EMC1404.xml,

EMC1422.xml, EMC1423.xml, and EMC1424.xml)

Figure 1.1 EVB-EMC14XX Block Diagram

EVB-EMC14XX User Manual

SMSC EMC140X/2X Revision 1.0 (12-14-06)

2 Getting Started

2.1 System Requirements

To use the EVB you will need:

nA PC running Windows 2000 or XP

nDisplay resolution 800x600 (or larger to view several windows simultaneously)

nAn available USB port

2.2 Feature Summary

nThe SMSC Chip Manager (ChipMan) application allows viewing and changing register values

nGraphing of any register

nHeaders for connecting a remote diode or CPU/GPU

nResistance Error Correction verification

nSaving of settings of all registers allowing for quick loading at a later time

nUSB communication to evaluation board

nAn external SMBus master may also be used via jumper settings

2.3 Installing the EVB

1. Install the Chip Manager application and device driver on a PC by running Setup.exe from the Chip

Manager distribution CD. A revision history and install/un-install notes may be found in the

readme.txt file on the disk.

2. Connect the supplied USB cable to an available USB port on the PC. Plug the “mini-B” end of the

USB cable into EVB connector P6. The +3.3V and Bridge ACT LEDs should illuminate. After the

EVB is connected to the PC the “Find New Hardware” wizard will pop up for USB driver installation.

Follow the instructions in the readme.txt file to complete the installation process.

3. Start the EVB Software by selecting the Chip Manager application from the SMSC folder from the

Programs Windows Start menu. The EVB will initialize and the Chip Manager Quick Help screen

will appear as in Figure 2.1. The USBAct LED should be blinking when the Chip Manager is

running. For more help with Chip Manager, select Help -> Contents for an html based help

document as shown in Figure 2.2.

Note: The SMSC Chip Manager application allows viewing and changing register values for a variety

of EVBs including the EMC1001, EMC1002, EMC1023, EMC1033 and EMC2101. The Chip

Manager software only needs to be installed once to support all of these EVBs. The list of

supported EVBs may be found in the pulldown menu under Options -> Select Device.

EVB-EMC14XX User Manual

Revision 1.0 (12-14-06) SMSC EMC140X/2X

Figure 2.1 Chip Manager Quick Help Startup Screen

EVB-EMC14XX User Manual

SMSC EMC140X/2X Revision 1.0 (12-14-06)

Figure 2.2 Chip Manager Help Screen

EVB-EMC14XX User Manual

Revision 1.0 (12-14-06) SMSC EMC140X/2X

2.4 Board Layout

The EVB was designed for ease of use and user experimentation with easily accessible jumpers and

access to the SMBus data lines. Figure 2.3 below shows the silk-screen for the EVB-EMC14XX.

Figure 2.3 EVB-EMC14XX Board Outline and Silk-screen

EVB-EMC14XX User Manual

SMSC EMC140X/2X Revision 1.0 (12-14-06)

3 Hardware Description

3.1 Introduction

The EVB-EMC14XX provides the means to demonstrate all of the EMC140X/2X features and to view

and modify registers. LEDs indicate status information and test points are included to monitor system

voltages with a user provided voltmeter or oscilloscope.

3.2 EMC140X/2X Devices

A total of four of six SMSC devices are on-board the EVB-EMC14XX. Jumpers enable which version

is active on the EVB. Please contact SMSC for boards with the EMC1423 or EMC1424 devices.

3.3 USB to SMBus Bridge

The USB to SMBus bridge is based on an 8051 micro controller with integrated USB and SMBus

interfaces as well as internal flash and RAM. During EVB manufacture, firmware is loaded into the

bridge that provides the interface between the USB and the SMBus. Power is sourced to the micro

controller from the USB interface for device power and communication.

3.3.1 Direct SMBus Connect Option

It is also possible to connect an external SMBus master to the EVB-EMC14XX. A few jumper settings

are all that is required to drive the any one of the devices on-board the EVB:

nSimply remove the jumpers on JP6 and connect the SMBus master to the SCL, SDA and ALERT

pins, as well as an external supply for +3.3V.

nThe +3.3V can be supplied by the SMBus bridge by leaving the +3.3V jumper in place and retaining

the USB connection.

3.4 Connecting to Remote Diodes

This EVB is populated with jumpers to connect to an external diode or CPU/GPU. If connecting to a

CPU’s thermal diode, it is necessary to provide a common ground. Also, it is usually necessary to bias

the appropriate CPU Vcc plane above this common ground to avoid forward-biasing the ESD diodes

with the temperature sensor signals. These connections have been provided on JP11 which is read by

EMC1422. Consult the CPU manufacturer’s datasheet for guidance on interfacing to the thermal diode.

Refer to the schematic EMC14XX_EVB_SCH-7092-A.pdf for details on the EVB header connections.

3.5 Resistance Error Correction (REC)

The remote diode DN signal path has a 100 ohm series resistor to demonstrate the EMC140X/2X’s

REC feature. See Table 3.3 for details on the REC jumper settings.

3.6 Power Source

This EVB requires only one USB connection to power the entire board. The USB-SMBus bridge

regulates the +5V USB power to +3.3V used by the EMC140X/2X and other EVB circuitry.

3.7 Test Points

Test points are provided for:

nGround

n+3.3V power

n+5V_USB power

nALERT, THERM, and SYS_SHDN outputs

EVB-EMC14XX User Manual

Revision 1.0 (12-14-06) SMSC EMC140X/2X

3.8 LED Indicators

LEDs indicate the status of the following signals (Ta ble 3.1 ).

3.9 Jumper Settings

This EVB has many jumper configurations to evaluate all of the features of the EMC140X/2X family of

devices.

The first jumper the user should connect is the device enable jumper. This jumper will determine which

of the 6 devices will be powered up and evaluated.

The remote diode on board the EVB-EMC14XX has an in-line series resistance adjustment. Checking

the REC (Resistance Error Correction) feature of the EMC1402 is accomplished by setting the jumper

on JP16 as shown in Table 3.3. An open jumper adds 100 ohms of series resistance to the DN line of

the diode connection. To return to 0 ohm series resistance, replace the jumper on JP16. This feature

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

LED4 USB Activity NO Activity on USB port Activity on USB port NA

LED5 SYS_SHDN +3.3V power OFF No SYS_SHDN SYS_SHDN

LED6 THERM +3.3V power OFF No THERM THERM

LED7 ALERT/THERM +3.3V power OFF No ALERT/THERM ALERT/THERM

LED02 EMC1402 power device OFF device ON NA

LED03 EMC1403 power device OFF device ON NA

LED04 EMC1404 power device OFF device ON NA

LED22 EMC1422 power device OFF device ON NA

LED23 EMC1423 power device OFF device ON NA

LED24 EMC1424 power device OFF device ON NA

Table 3.2 Device Selection Jumpers

DEVICE ENABLE DISABLE

EMC1402 JP1: short 1-2 JP1: short 2-3

EMC1403 JP2: short 1-2 JP2: short 2-3

EMC1404 JP3: short 1-2 JP3: short 2-3

EMC1422 JP4: short 1-2 JP4: short 2-3

EMC1423 JP5: short 1-2 JP5: short 2-3

EMC1424 JP6: short 1-2 JP6: short 2-3

EVB-EMC14XX User Manual

SMSC EMC140X/2X Revision 1.0 (12-14-06)

is demonstrated on the EMC1402 only. However, each device of the EMC140X/2X family has this

feature.

This EVB also allows for an off-board diode to be tested (see Ta b l e 3 . 4 ). This is done by removing

both jumpers of the device of interest. Then connect Pin 1 to the ‘remote+’ terminal of the remote diode

and Pin 3 to the ‘remote-‘ terminal of the remote diode. Make sure a common ground exists between

the remote diode (GPU, etc.) and the EMC140X/2X EVB. Also ensure that the remote diode is properly

biased according to the diode manufacture. One remote connection is provided per EMC140X/2X

device.

Table 3.5 EMC1422 Off-board Diode Connections

Table 3.3 Resistance Error Correction

JUMPER NAME OPEN SHORT

JP16 REC 100 ohms in

DN line (diode remote -)

0 ohms in

DN line (diode remote -)

Table 3.4 Remote Diode Configurations

JUMPER CONFIGURATION PIN 1 PIN 2 PIN 3 PIN 4

JP7

On-board diode EMC1402 (Q1) short / DP short / DN