Is this an Error in the STMH7B3xi Datasheet?

Forum|Forum|4 years ago
August 17, 2022
4 replies
1187 views

Section Memories

...

The Flash memory is organized as follows:

• Two independent 1 Mbyte banks of user Flash memory, each one containing 128 user sectors of 8 Kbytes

each.

• 128 Kbytes of System Flash memory from which the device can boot.

• 1 Kbyte of OTP (one-time programmable) memory containing option bytes for user configuration

Shouldn't this read:

The Flash memory is organized as follows:

• Two independent 1 Mbyte banks of user Flash memory, each one containing 8 user sectors of 128 Kbytes

each.

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C

ClaydonkeyAuthor

Associate III

I spose I should RTFM!!!

I was looking at openblt and for H7xx devices there is a struct 'tFlashSector'

which reads:

#elif (BOOT_NVM_SIZE_KB == 2048)
 /* { 0x08000000, 0x20000, 0, 1 }, flash sector idx 0 - reserved for bootloader */
 { 0x08020000, 0x20000, 1, 1}, /* flash sector idx 1 - 128kb */
 { 0x08040000, 0x20000, 2, 1}, /* flash sector idx 2 - 128kb */
...
 { 0x081C0000, 0x20000, 6, 2}, /* flash sector idx 14 - 128kb */
 { 0x081E0000, 0x20000, 7, 2}, /* flash sector idx 15 - 128kb */

Never ASSUME... it makes an *** out of U and ME

So the fact is:

H74x devices have 8 sectors of 128K

H7A(B) device do indeed have 128 sectors of 8K

Go figure

Equipped with this knowledge openblt struct should be:

static const tFlashSector flashLayout[] =
{
/* (BOOT_NVM_SIZE_KB == 2048) */
 {0x8020000,0x2000,16,1}, /* flash sector idx 16 - 8kb */
 {0x8022000,0x2000,17,1}, /* flash sector idx 17 - 8kb */
…
{0x81FA000,0x2000,125,2}, /* flash sector idx 125 bank2 - 8kb */
 {0x81FC000,0x2000,126,2}, /* flash sector idx 126 bank2 - 8kb */
 {0x81FE000,0x2000,127,2}, /* flash sector idx 127 bank2 - 8kb */
}