W25Q128JVSIQ page program issue.

[Joe31093]

Hello. I am using W25Q128JVSIQ for flash storage. I am curious if anyone has run into this or a similar issue with using the flash chip with standard SPI.

1: I can program page 0 up to 256 bytes without issues.
2: I can then program page 1 up to 255 bytes without issues.

3: If I program page 1 with 256 bytes, all of the remaining pages (2, 3, 4...) have the same data as page 1 (without any additional programming).
4: if I program page 2 with any data, the page 2 data overwrites page 1 data. And remaining pages have the same data as page 1.

Anyone seen this type of behavior before?

ASCII written to page 0, 1, 2

00_000000000000
01_010101010101
02_020202020202
03_030303030303
04_040404040404
05_050505050505
06_060606060606
07_070707070707
08_080808080808
09_090909090909
10_101010101010
11_111111111111
12_121212121212
13_131313131313
14_141414141414
15_151515151515
16_161616161616
17_171717171717
18_181818181818
19_191919191919
20_202020202020
21_212121212121
22_222222222222
23_232323232323
24_242424242424
25_252525252525
26_262626262626
27_272727272727
28_282828282828
29_292929292929
30_303030303030
31_313131313131
32_323232323232
33_333333333333
34_343434343434
35_353535353535
36_363636363636
37_373737373737
38_383838383838
39_393939393939
40_404040404040
41_414141414141
42_424242424242
43_434343434343
44_444444444444
45_454545454545
46_464646464646
47_474747474747

Flash read

Flash read address 000
00_000000000000
01_010101010101
02_020202020202
03_030303030303
04_040404040404
05_050505050505
06_060606060606
07_070707070707
08_080808080808
09_090909090909
10_101010101010
11_111111111111
12_121212121212
13_131313131313
14_141414141414
15_151515151515
Flash read address 256
12_121212121212
13_131313131313
10_101010101010
11_111111111111
20_202020202020
21_212121212121
20_202020202020
21_212121212121
00_000000000000
01_010101010101
02_020202020202
03_030303030303
00_000000000000
01_010101010101
00_000000000000
01_010101010101
Flash read address 512
12_121212121212
13_131313131313
10_101010101010
11_111111111111
20_202020202020
21_212121212121
20_202020202020
21_212121212121
00_000000000000
01_010101010101
02_020202020202
03_030303030303
00_000000000000
01_010101010101
00_000000000000
01_010101010101
Flash read address 768
12_121212121212
13_131313131313
10_101010101010
11_111111111111
20_202020202020
21_212121212121
20_202020202020
21_212121212121
00_000000000000
01_010101010101
02_020202020202
03_030303030303
00_000000000000
01_010101010101
00_000000000000
01_010101010101

and so on...

 

[MarkT]

Looks like some problem with addressing, maybe SPI timing is out?

 

[PaulStoffregen]

Which Teensy are you using? Which pins is the chip connected to? And which library or code are you using to run this test?

 

[Joe31093]

Hi Paul. I have the flash chip connected to a STM32G474. I use the STM32CubeIDE to configure the SPI to run at mode 0, 2.6 MBits/sec. I use the HAL calls to transmit / receive data over SPI with the flash chip. I tried different speeds and observed no change to the data written to flash. I also have swapped out flash chips and no change to the results.

Since others here use the W25Q series flash chips, I was just curious if anyone has run into this issue.

 

[mjs513]

Since others here use the W25Q series flash chips, I was just curious if anyone has run into this issue.

Sounds like its more of an issue with the drivers for the STM32G474. During LittleFS testing never ran into an issue.

 

[PaulStoffregen]

I was just curious if anyone has run into this issue.

Haven't seen an issue like that with any Teensy boards.