IMX93 DDR Tool

[Embedded-world]

Dear Experts,

       In the latest version of the iMX DDR Tool v24.12, I am going to configure the 1GB and 2GB LPDDR4x memory for a custom board based on the iMX93. How should I choose the frequency set points (FSP)? Also, where can I find the DQ, ODT, and DS values for this configuration, or should I use the default values? Does it always depend on the memory? What is the significance of the vTSA test case in the DDT Tool?

Frequency Set Points( FSP): 
Frequency set points (fsp)

DQ, ODT & DS configuration: DQ, ODT, DS Config

Please clarify the above doubts with respect to the LPDDR4x memory configuration.

Thanks & Regards,
Ravikumar

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

1. The Frequency Set-points are defined below and they aren't required to be updated.

Number of FSP. This setting allows the user to select the number of frequency setpoints to include for the Hardware Fast Frequency Change.

2. From your simulation (depending on the memory and the controller, as the transmission line characteristics, the optimum ODT will be determined.

These are the desired ODT impedance in Ohm. Valid values for DDR4=240,120,80,60,40. Valid values for DDR3L=high-impedance,120,60,40. Valid values for LPDDR4=240,120,80,60,40.

3. vTSA performs Virtual Timing Signal Analysis by running tests to determine margins of DDR subsystem.

Diag Write Margin/ Diag Read Margin tests creates virtual data eye diagram for each DQ lanes.

Regards