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Evaluates: DS2401, DS2406, DS2411,

DS2413, DS2431, DS24B33, DS28E07

DS9090EVKIT

Evaluation System

DS9090EVKIT Operation

In order to start communicating with the part, it is neces-

sary to have the DS9490R# adapter connected and have

a part placed into the DS9120P+ socket.

● Select the 1-Wire device to evaluate and insert it into

the appropriate socket, ensuring it is properly orient-

ed. Jumper the appropriate enable pins for the TSOC

socket. See the DS9090EVKIT Setup section for help.

● Run the

OneWireViewer. If any difficulty is en-

countered, see the Troubleshooting Guide section.

Another helpful resource is

Application Note 3358:

OneWireViewer User’s Guide.

The

OneWireViewer presents a Device List window

located on the left-hand side of the main screen. It dis-

plays a list of the different 1-Wire devices found con-

nected to the DS9490R#. The 1-Wire device type inserted

into the socket or header of the evaluation board should

be shown in the

Device List window, along with the 64-bit

ROM ID lasered into the device. Figure 8 shows the

DS1972 in the Device List window, along with its 64-bit

ROM ID value of

DC000002A0BC322D.

● From the

Device List window, select the part by

clicking on it.

● Once the 1-Wire device has been selected, the right-

hand side of the main

OneWireViewer screen is

populated with different tabs. There are at least three

tabs for each device contained in the DS9090EVKIT:

Description, Memory, and File. A fourth tab labeled

Switch is also available on those parts containing

switches.

● Clicking on the

Memory tab brings up the Memory

Viewer. The user has the choice of reading/writing any

of the memory banks listed in the Banks section of the

Memory Viewer. When done editing the raw page (en-

tering in a hexadecimal number for each byte), press

Commit Changes to write to the memory.

● Click the

Commit Changes button to write the

changes to the device memory.

● Clicking

Refresh rereads the contents of the 1-Wire

memory.

● The

File tab allows writing files to the device’s

memory. To do this, the user needs to first

Format

the Device, then Create/Read/Write/Delete files

and directories.

● The

Switch tab allows reading and toggling of the

PIO pin states and clearing of activity latches. Refer

to

Application Note 3358 for further instructions on

how to use the many features of the OneWireViewer.

Detailed Description of Hardware

RJ11 Pin Assignment

Table 1 shows the pin assignment at RJ11 on the

DS9120P+ socket board and the DS9490R# USB-to-

1-Wire/iButton adapter.

Table 1. 1-Wire RJ11 Pinout

PIN

NUMBER

SIGNAL

NAME

DESCRIPTION

1

3.3V

Used only for DS2411

2

GND

Not used for this EV kit

3

1W

1-Wire Data

4

GND

1-Wire Ground Reference

5

PULSE

Not used for this EV kit

6

(Reserved)

Not used for this EV kit

SYMPTOM

POSSIBLE CAUSE

CORRECTIVE ACTION

Operating system prompt

giving installation error.

The 1-Wire adapter’s

device driver did not get

installed properly.

Refer to Application Note 1740: White Paper 6: 1-Wire Drivers

Installation Guide for Windows, specifically the “Appendix A: 1-Wire

USB Adapter (DS9490) Installation Help” section.

Cannot communicate

through 1-Wire adapter.

The PC port hardware is

not functioning properly.

Does the port work with other applications, such as a keyboard or

mouse? If not, contact the motherboard vendor for BIOS updates or

new drivers.

The 1-Wire adapter is not

functioning.

Try the 1-Wire adapter on another PC. If the problem persists, use a

different 1-Wire adapter or order a new adapter of this type.

The adapter type selected

is not what is connected.

Run the

Default 1-Wire Net application and select the correct adapter

type and/or port number.

Software finds 1-Wire

adapter, but does not read

a 1-Wire device.

Possible broken wire in

the RJ11 cable or the USB

connector of the DS9490R.

Check the cable for broken wires.

Troubleshooting Guide