AT32F421 GPIO user guide
2020.07.30
9
Rev.1.0.0
Table 3. FTa pin example
Pin name
Pin name
IO structure
Alternate function
Additional function
PA0
I/O
FTa
TMR1_ETR /
USART2_CTS
/I2C2_SCL /
COMP_OUT
ADC_IN0COMP_INP2
/ COMP_INM6 /
WKUP1
5V-tolerant pin (FT)
Other GPIOs are all 5V tolerant.
Table 4. FT pin example
Pin name
Pin name
IO structure
Alternate function
Additional function
PA8
I/O
FT
TMR1_CH1 /
USART1_CK /
UART2_TX /
I2C2_SCL /
CLKOUT /
EVENTOUT
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