What is required to perform the ERASE ALL command (nRF24LE1)?

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Claas — Fri, 13 Sep 2013 13:18:01 GMT

lol, that explains a lot :D Thanks again, Håkon

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Håkon Alseth — Fri, 13 Sep 2013 13:13:20 GMT

Hi Claas,

The device you are communicating with is a OTP device (one time programmable). The 24LEH indicates that it is a 48 pin OTP part. The equivalent flash part is named "24LE1F" for the 48 pin package.

This means that you cannot change it's content from '0' to '1'. This is why your erase command is not working.

Best regards Håkon

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Claas — Fri, 13 Sep 2013 13:01:29 GMT

Hi Håkon.

Thanks for the tips. Let me simply answer each of your points.

[list=1] Yes, i tried higher frequencies (i.e. 250 KHz and 1MHz). [/list] [list=2] No, unfortunately i do not. [/list] [list=3] Here we go: NRF A 24LE1H 1020BK [/list]

Best regards, Claas

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Håkon Alseth — Fri, 13 Sep 2013 09:34:34 GMT

Hi Claas,

It seems that you read out the infopage, and then doing an ERASE_ALL after some other commands (WEN, read flash status register etc). I do not see any issues or reasons why it should not work to erase the flash.

You are running on a very slow frequency. Have you tried higher frequencies? 2, Do you have other devices to test this on?
Can you post the chip-markings? Should be something like: NRF C 24LE1F 1112AA

Best regarsd Håkon

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Claas — Thu, 12 Sep 2013 15:28:07 GMT

Hi Håkon.

I am using "saleae logic16" for debugging. Thus the SPI lines were recorded with the corresponding tool (link attached). If this option does not suite you there is also a CSV file export. However, i suggest to use the mentioned tool.

Cheers, Claas

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Håkon Alseth — Thu, 12 Sep 2013 06:45:26 GMT

Hi Claas,

Can you upload a scope of the SPI lines?
Can you also upload a picture of your test setup?

Best regards Håkon

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Claas — Wed, 11 Sep 2013 16:18:59 GMT

Thanks for your reply, Håkon. You are right, that the device will power-up in write disable state and it will restore the write disable state after each write/erase command. However, the write disable state is not restored after CSN goes inactive. Nonetheless, i tried your suggestion:

CSN=low; send: 0x06; send: 0x62; CS=high;

It does have the same effect as my previously described example (i.e. main memory is not erased and the write enable state remains).

Best regards, Claas

RE: What is required to perform the ERASE ALL command (nRF24LE1)?

Håkon Alseth — Mon, 09 Sep 2013 10:09:16 GMT

Hi,

The WREN will be reset after CSN goes inactive: [i]The device will power-up in write disable state, and automatically go back to write disable state after each write/erase SPI command (FCSN set high). Each erase and write command over the SPI interface must therefore be preceded by a WREN command.[/i]

Try setting CSN_LOW, then send WREN and ERASE_ALL, then set CSN high again.

Best regards Håkon