AWR2243: Timing between NRESET and WARM_RESET

William List

Part Number: AWR2243

What is the time delay from nRESET being released to WARM_RESET de-asserting? Is WARM_RESET driven by the internal FW or is it controlled by HW?

Bill

over 3 years ago

0 Ishita Kochar over 3 years ago

TI__Mastermind 31680 points

Hello Bill,

Do you want to understand the difference between the two resets?

nReset is the reset triggered by the device reset pin NREST. This resets the entire device, including all subsystems and interfaces.

Whereas, in case of WARM_Reset, this is an active low reset either generated internally by the device (soft reset), or triggered by the device pin WARM_RESET. A Warm_reset excludes certain modules and spaces from reset. Those can only be reset by power-on reset (NReset).

Regards,

Ishita

0 William List over 3 years ago in reply to Ishita Kochar

TI__Expert 6855 points

Hi Ishita, per my recent understanding the time delta between nRESET and WARM_RESET is 7ms. This value is not stated in Figure 8-2 of the DS.

0 Ishita Kochar over 3 years ago in reply to William List

TI__Mastermind 31680 points

Hello William,

Let me check with the DS owner and get back to you next week on this.

Regards,

Ishita

0 Vivek Dham over 3 years ago in reply to William List

TI__Guru 58035 points

Hello Bill,

In 2243 the time between nRST release to WARMRST de-assertion is ~7.5msec. This is drive by HW, there is no SW execution at this point. Only once the WARM RESET is de-asserted does the bootloader start the execution.

Regards,
Vivek

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AWR2243: Timing between NRESET and WARM_RESET