Table 12. Legend/Abbreviations Used In The Pinout Table; Figure 9. Tssop20 Package - STMicroelectronics STM32F042F4 Manual

STM32F042x4 STM32F042x6
1. Pin pair PA11/12 can be remapped in place of pin pair PA9/10 using the SYSCFG_CFGR1 register.
Name
Pin name
Pin type
I/O structure
Notes
Alternate
functions
Pin
functions
Additional
functions

Table 12. Legend/abbreviations used in the pinout table

Abbreviation
Unless otherwise specified in brackets below the pin name, the pin function during and
after reset is the same as the actual pin name
S Supply pin
I/O Input / output pin
FT 5 V-tolerant I/O
FTf 5 V-tolerant I/O, FM+ capable
TTa 3.3 V-tolerant I/O directly connected to ADC
TC Standard 3.3 V I/O
RST Bidirectional reset pin with embedded weak pull-up resistor
Unless otherwise specified by a note, all I/Os are set as floating inputs during and after
reset.
Functions selected through GPIOx_AFR registers
Functions directly selected/enabled through peripheral registers
DocID025832 Rev 5

Figure 9. TSSOP20 package

Pinouts and pin descriptions
Definition
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