CPU2 cannot initialize when jumping from Boot to App

[AFink]

Hi,

Background

Working on STM32WB55.

Flash size is 1MByte.

Attached .ld file describes: Boot, Bank 0 (App1), Bank 1 (App2) and DB sections.

Boot and App linker files (.ld) are quite similar from memory management aspect.

App .ld file 

/* Specify the memory areas */
MEMORY
{
FLASH_BOOT (rx)			: ORIGIN = _BOOT_START,		LENGTH = _BOOT_SIZE    	/* 32KB for BOOT						End address: 0x08007FFF */
FLASH_BANK_0 (rx)		: ORIGIN = _BANK_0_START, 	LENGTH = _BANK_0_SIZE   /* 250KB for Bank 0 (Factory version)	End address: 0x0805F7FF */
FLASH_BANK_1 (rx)		: ORIGIN = _BANK_1_START, 	LENGTH = _BANK_1_SIZE   /* 250KB for Bank 1 (New version)		End address: 0x080B6FFF */
FLASH_DB_CFG (rx)		: ORIGIN = _DB_CFG_START,	LENGTH = _DB_CFG_SIZE	/* 16KB for DB (Configuration) 			End address: 0x080BAFFF*/
RAM (xrw)				: ORIGIN = 0x20000004, 		LENGTH = 0x2FFFC
RAM_SHARED (xrw)		: ORIGIN = 0x20030000, 		LENGTH = 10K
}

Scenario

Jump from Boot to App (Bank 0)

Problem

1. When App size of Bank 0 and Bank 1 is lower than 250KByte --> Working well (Jump from Boot to App (Bank 0))
2. When App size of Bank 0 and Bank 1 is bigger than 250KByte --> Not Working well --> CPU2 cannot initialize when jumping from Boot to App. [I have WDG in this case, so after MCU is reset by WDG CPU2 succeeds to initialize. The problem occurs in Power-up]

** Can somebody help to understand why is that (CPU2 cannot initialize when jumping from Boot to App)?

Thanks,

Aviv

[AFink]

Hi,

Further to above post, I noticed that al long as FLASH_BANK_1 (in .ld file) is ended in address lower than ~512KByte --> then CPU2 is initialized successfully.

BUT, once FLASH_BANK_1 is ended in address bigger than ~512KByte --> then CPU2 is has problems to initialize.

Question:

Is there any issue with application that is defined in .ld file to run on the second half of the flash (i.e.: in address bigger than 512KByte out of 1MByte)?

Thanks,

Aviv