DocID027496 Rev 1

9/24

AN4658

Peripheral migration guide

23

The Cube Hardware Abstraction Layer (HAL) is compatible between the STM32F429/F439

and STM32F446 lines.

2.2

Memory mapping

Address mapping has been slightly changed in the STM32F446xx vs. STM32F429xx/439xx,

the differences are shown in Table 4, where a gray cell indicates that the feature is not

available (NA).

ADC (12 bits)

Count

3

3

-

-

Number of

channels

16 / 24

16 / 24

-

-

DAC (12 bits)

Count

1

1

-

-

Number of

channels

22

-

-

RCC

Yes

Yes

-

More flexibility,

with additional

clock sources to

AHB, USB and

audio peripherals.

Dedicated input

clock divider input

for PLL.

New LSE mode.

Table 3. Peripheral compatibility analysis (continued)

Peripherals

STM32F429xx/439xx STM32F446xx

Compatibility

SW

Comments

Table 4. Peripheral bus mapping comparison

Peripheral

Bus

STM32F429xx/439xx

Base address

STM32F446xx

Base address

QuadSPI Register

AHB3

NA

0xA000 1000

RNG

AHB2

0x5006 0800

NA

HASH

0x5006 0400

NA

CRYP

0x5006 0000

NA

DMA2D

AHB1

0x4002 B000

NA

ETHERNET MAC

0x40029000

NA

CPIOK

0x4002 2800

NA

GPIOJ

0x4002 2400

NA

GPIOI

0x4002 2000

NA