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©2017 Integrated Device Technology, Inc.

June 5, 2017

DISCLAIMER Integrated Device Technology, Inc. (IDT) and its affiliated companies (herein referred to as “IDT”) reserve the right to modify the products and/or specifications described herein at any time,
without notice, at IDT’s sole discretion. Performance specifications and operating parameters of the described products are determined in an independent state and are not guaranteed to perform the same
way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability
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8T49N24x EEPROM Programming Guide Application Note

Recovery from Incorrect Write

In case something goes wrong and the EEPROM is written incorrectly, the device may not boot correctly, and Timing Commander may be 
unable to connect to the device. If this occurs, the following steps should be used (See the User's Guide for the board revision that is 
being used):
1. Power down the evaluation board.
2. Remove the EEPROM from the socket.
3. Power up the Evaluation Board (the device will load the -998 configuration from OTP).
4. Connect to the board and use “WriteAll” to ensure the I2C communication is working correctly (steps 1–5 of 

Method 1: Direct Write to 

EEPROM Using Timing Commander and the Evaluation Board

).

5. Without powering down, place the EEPROM back in the socket.
6. Write to the EEPROM (steps 7–11 of 

Method 1: Direct Write to EEPROM Using Timing Commander and the Evaluation Board

).

7. The EEPROM should now have the correct settings programmed. 

Revision History

Revision Date

Description of Change

June 5, 2017

Added support for the 8T49N240i device

Converted the document to the latest template

August 7, 2015

Initial release. 

Содержание 8T49N24 Series

Страница 1: ...8T49N242i Evaluation Board with AT24C04 EEPROM installed 1 regular USB cable Timing Commander v1 5 3 1 or later installed on a PC 8T49N24x Timing Commander Personality v0 8 or later If using a Dash Co...

Страница 2: ...lication Note After the settings file is ready the following methods are available to write the settings to the EEPROM Method 1 Direct Write to EEPROM Using Timing Commander and the Evaluation Board M...

Страница 3: ...tion Board Before beginning make sure Timing Commander is installed the 8T49N24x personality file is downloaded the 8T59N24i evaluation board is powered and the USB cable is plugged into the evaluatio...

Страница 4: ...lication Note 4 Press Write to Connected Chip 5 A successful registers write will return a successful message pop up 6 Verify the device is configured correctly by using single register reads and chec...

Страница 5: ...e 9 A successful EEPROM write will return a successful message pop up 10 Press the reset button on the evaluation board see the User s Guide for the board revision being used for the reset button loca...

Страница 6: ...d itself does not write to the attached EEPROM The following steps will perform this action 1 Press the EEPROM button on the main window within Timing Commander to show the EEPROM popup window 2 Press...

Страница 7: ...ton again 4 The register contents may also be arbitrarily edited and the CRC can then be calculated for the resulting settings Changing the values in this manner will lock the displayed value to whate...

Страница 8: ...rite to the attached EEPROM The following steps will perform this action 1 Press the EEPROM button on the main window to show the EEPROM popup window 2 Select the file format Hex Space Separated appea...

Страница 9: ...ks of IDT and its subsidiaries in the United States and other countries Other trademarks used herein are the property of IDT or their respective third party owners For datasheet type definitions and a...

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