AN3427 Datasheet, PDF (6/52 Pages) STMicroelectronics – Migrating a microcontroller application from STM32F1 to STM32F2 series

Hardware migration
2
Hardware migration
AN3427
All peripherals shares the same pins in the two families, but there are some minor
differences between packages.
In fact, the STM32 F2 series maintains a close compatibility with the whole STM32 F1
series. All functional pins are pin-to-pin compatible. The STM32 F2 series, however, are not
drop-in replacements for the STM32 F1 series: the two families do not have the same power
scheme, and so their power pins are different. Nonetheless, transition from the STM32 F1
series to the STM32 F2 series remains simple as only a few pins are impacted (impacted
pins are in bold in the table below).
Table 1.
STM32 F1 series and STM32 F2 series pinout differences
STM32 F1 series
STM32 F2 series
QFP64
5
6
12
31
47
63
QFP100
12
13
19
20
49
73
74
99
QFP144
Pinout
23 PD0 - OSC_IN
24 PD1 - OSC_OUT
30 VSSA
31 VREF-
71 VSS_1
106 NC
107 VSS_2
143 VSS_3
QFP64
5
6
12
31
47
63
QFP100
12
13
19
20
49
73
74
QFP144
Pinout
23 PH0 - OSC_IN
24 PH1 - OSC_OUT
30 VDD
31 VSSA
71 VCAP1
106 VCAP2
107 VSS2
VSS_3
The figures below show examples of board designs that are compatible with both the F1 and
the F2 series.
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Doc ID 019001 Rev 1