2

Embedded memory

This section describes the embedded memory peripherals (FLASH, MEM) bits and registers migration from revision 13 to revision

14 of the STM32W108xx datasheet.

2.1

Flash memory

The Flash memory interface is the same IP on STM32F microcontrollers families, so almost all of the bits and registers are already

aligned with the standard naming except for the FLASH control registers (FPEC_CLK_REQ and FPEC_CLK_STAT registers).

2.1.1

STM32W108xx FLASH bit and register overview

Table 3 gives the list of the changes (renaming) made in the FLASH bits and registers.

Table 3.

FLASH memory bits and registers overview

STM32W108xx FLASH bits/registers naming overview

FLASH_

ACR

Reserved

PRFTBS

PRFTBE

HLFCYA

LATENCY

FLASH_

ACR

Reserved

PRFTBS

PRFTBE

HLFCYA

LATENCY

FLASH_

KEYR

FKEYR[31:16]

FKEYR[15:0]

FLASH_

KEYR

FKEYR[31:16]

FKEYR[15:0]

FLASH_

OPTKEYR

OPTKEYR[31:16]

OPTKEYR[15:0]

FLASH_

OPTKEYR

OPTKEYR[31:16]

OPTKEYR[15:0]

FLASH_SR

Reserved

EOP

WRPRTERR

Res.

PGERR

Res.

BSY

FLASH_SR

Reserved

EOP

WRPRTERR

Res.

PGERR

Res.

BSY