Datasheet
Pinouts and pin description STM32F20xxx
46/184 DS6329 Rev 16
Figure 15. STM32F20x UFBGA176 ballout
1. RFU means “reserved for future use”. This pin can be tied to V
DD
,V
SS
or left unconnected.
2. The above figure shows the package top view.
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Table 7. Legend/abbreviations used in the pinout table
Name Abbreviation Definition
Pin name
Unless otherwise specified in brackets below the pin name, the pin function during and after
reset is the same as the actual pin name
Pin type
S Supply pin
I Input only pin
I/O Input/ output pin
I/O structure
FT 5 V tolerant I/O
TTa 3.3 V tolerant I/O
B Dedicated BOOT0 pin
RST Bidirectional reset pin with embedded weak pull-up resistor
Notes Unless otherwise specified by a note, all I/Os are set as floating inputs during and after reset
Alternate
functions
Functions selected through GPIOx_AFR registers
Additional
functions
Functions directly selected/enabled through peripheral registers
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