AN3364

How to migrate across STM32 series

Doc ID 018608 Rev 3

9/17

1.1.2

STM32 product cross-compatibility

The STM32 series embeds a set of peripherals which can be classed in three categories:

●

The first category is for the peripherals which are by definition common to all products.

Those peripherals are identical, so they have the same structure, registers and control

bits. There is no need to perform any firmware change to keep the same functionality at

the application level after migration. All the features and behavior remain the same.

●

The second category is for the peripherals which are shared by all products but have

only minor differences (in general to support new features), so migration from one

product to another is very easy and does not need any significant new development

effort.

●

The third category is for peripherals which have been considerably changed from one

product to another (new architecture, new features...). For this category of peripherals,

migration will require new development at application level.

Table 2 through toTable 5 gives a general overview of this classification:

Table 2.

STM32 peripheral compatibility analysis F1 versus F0 series

Peripheral

Series

Compatibility

F1

F0

Comments

Pinout

SW compatibility

SPI

Yes

Yes+

Two FIFO available, 4 bit to 16

bit data size selection

Identical

Partial compatibility

WWDG

Yes

Yes

Same features

NA

Full compatibility

IWDG /

IWWDG

Yes

Yes++

Added a Window mode

NA

Partial compatibility

DBGMCU

Yes

Yes

No JTAG, No Trace

Identical for the

SWD

Partial compatibility

CRC

Yes

Yes+

Added reverse capability and

initial CRC value

NA

Partial compatibility

EXTI

Yes

Yes+

Some peripherals are able to

generate event in stop mode

Identical

Full compatibility

CEC

Yes

Yes++

Kernel clock, arbitration lost

flag and automatic transmission

retry, multi-address config,

wake up from stop mode

Identical

Partial compatibility

DMA

Yes

Yes

1 DMA controller with 5

channels

NA

Full compatibility

TIM

Yes

Yes+

Enhancement

Identical

Full compatibility

PWR

Yes

Yes+

No Vref, Vdda can be greater

than Vdd, 1.8 mode for core.

Identical for the

same feature

Partial compatibility

RCC

Yes

Yes+

New HSI14 dedicated to ADC

PD0 & PD1 =>

PF0 & PF1 for the

osc

Partial compatibility