28HL512 Sector Architecture Selection

[Maria1]

Hello,

I'm using S28HL512TFPBHI010 memory and I want to change sector architecture from hybrid to uniform. I tried to write new data to Configuration Register 3 (CFR3N[3] - UNHYSA - value 1) but when I read this register again it still has written old value: 0x00 (default). 

I checked my functions for register writing and for example I can change the interface by writting 0x41 to CFR5N and then read it by OCTOSPI inteface.

I read that writing to UNHYSA can be blocked by setting ASPO[1] - ASPPER bit to 0, but I read this register and it has got default value 0xFF - 1 = Persistent Protection Mode is disabled.

Is there anything else I should do to change sector oragnization?

Best Regards

[Ronak]

Hi,

Can you please confirm if the SPI connection is working?

Can you try reading the device id and confirm if you read a valid ID or not?

Also can you please share the waveform of the connection when you send the write command to the Flash?

Thanks,
Ronak

[Maria1]

Both interfaces are working. I can change interface to OSPI, read device ID and change Configuration Register 4 from default value - 0xA8 to 0xC8. I attach waveforms from the oscilloscope. Sequence which I send after applying power:

1.  Write Enable (SPI) - CMD - 0x06,
2.  Set Octospi in SDR mode (SPI) - CMD - 0x71, ADDRESS - 0x800006, VALUE - 0x41
3.  Read Memory ID (OSPI) - CMD 0x9F9F, ADDRESS - 0x00000000, VALUE - 0x34, 0x5A, 0x1A, 0x0F, 0x03, 0x90 - correctly read by my microcontroller (send by serial port to PC)
4. Read Configuration Register 4 (OSPI) - CMD - 0x65, ADDRES - 0x00800005, default VALUE - 0xA8
5. Write Enable (OSPI) - CMD - 0x0606
6. Polling for write enable (OSPI) - CMD - 0x05, ADDRESS - 0x00000000, read VALUE - 0x02 (which means - Program, erase or register write is enabled)
7. Set Configuration Register 4 to 0xC8 - CMD - 0x71, ADDRESS - 0x00800005, VALUE - 0xC8
8. Read Configuration Register 4 (OSPI) - CMD - 0x65, ADDRES - 0x00800005, VALUE - 0xC8

Using this sequence I can change Configuration Register 3 from default 0x00 to 0x10 but I can't write 1 to UNHYSA bit (0x00 -> 0x08).

Thanks

[Ronak]

Hi,

You have shared the code sequence for the Register 4. Can you please share the command sequence that is used for writing the UNHYSA bit of Configuration Register 3 with the waveforms

Thanks,
Ronak

[Maria1 · Accepted solution]

HI,

I found a bug - the problem was too few dummy cycles in read procedure.

Thanks