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标题: Problem while reading / writing AT45DB081D [打印本页]

作者: Vladimir    时间: 2020-9-18 15:00     标题: Problem while reading / writing AT45DB081D

Good day!

I tried to read / write SPI AT45DB081D SOP8 (Page 264).
Reading is not very stable, there are many errors, ChkSum is different all the time.
Sometimes it reads correctly, but an error occurs if you click Verify. Finding out which reading was correct is very difficult.

I have 5 new AT45DB081D that I wanted to write, Verify gives an error. I noticed a pattern in the error.
The error is 8 bytes, every 256 bytes. Those. the programmer cannot write 264 page bytes.
The program writes 256 bytes, and the remaining 8 makes an error.

I used the recommendations of the developers and connected VCC and MISO to GND through the recommendation of capacitors.

I have Windows 7x64, TL866ii Plus Ver: 04.02.120.

Thank you very much

作者: admin    时间: 2020-9-19 10:22

回复 1# Vladimir
if the chip was programmed as 256 bytes page.  and the chip can not be used 264 bytes pages forever.
(power of 2 bit )  is OTP bit
作者: Vladimir    时间: 2020-9-19 15:10

All ICs available for sale are 264 page sizes. AT45DB081 256 bytes are available on request.

Power 2 bit

Power 2 bit.jpg
2020-9-19 15:13

When trying to read a Page 256 byte flash, an error occurs.

Page 256 bit

Page 256 bit.jpg
2020-9-19 14:57

And this is what the Verify error looks like when checking a record page 264 bits


2020-9-19 15:03

I am programming and reading only 264 bit page and cannot seem to accomplish this.

图片附件: [Page 256 bit] Page 256 bit.jpg (2020-9-19 14:57, 283.48 KB) / 下载次数 100

图片附件: [Error] Error.jpg (2020-9-19 15:03, 509.53 KB) / 下载次数 99

图片附件: [Power 2 bit] Power 2 bit.jpg (2020-9-19 15:13, 77.86 KB) / 下载次数 104

作者: admin    时间: 2020-9-19 16:49

回复 3# Vladimir

I will check it.
作者: admin    时间: 2020-9-24 11:29

No problem after careful testing
Pay attention to the following points when operating this chip.

1 。When  changing hardware from T56->TL866II or TL866II->T56, be sure to select the chip again.
2.  add a C  100P  between PIN MISO and GND  (PIN8 and PIN7) .
3.  Some adapters(ON TL866II) may be affected.Can be tested with a simple adapter.

AT45DB021D  and 081D  only memorysize is diffrent
2020-9-24 11:31

图片附件: AT45DB021D.jpg (2020-9-24 11:31, 159.91 KB) / 下载次数 97

作者: wisesokol    时间: 6 天前 01:28

Hi. Can you tell me, where is status register config in progger? I need to known, what is bit0 on my chip (45db011d). I don’t understand 256 or 264 page size config of my chip. I need dump it.
Perhaps this is a stupid question, but please answer.

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