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Multiple pins with same function?

Question asked by mitchell.jeff on May 21, 2014
Latest reply on May 21, 2014 by Clive One
Browsing through the STM32 F405 datasheet, I'm noticing serial ports with functions listed multiple times even on the same chip. At first I assumed (for example, USART1 TX) would be listed multiple times, but on any given package (say 64pin, vs 100pin) it woiudl only show up on one pin.. but this is not the case.

Example:

USART1 TX is listed on both pin 42 and 58:

pin 42 PA9:
USART1_TX/ TIM1_CH2 /
I2C3_SMBA / DCMI_D0/
EVENTOUT

pin 58: PB6
I2C1_SCL/ TIM4_CH1 /
CAN2_TX /
DCMI_D5/USART1_TX/
EVENTOUT

I'd just like to confirm.. either pin can be configured for this function at your will; default function is probably just the GPIO.

Or is it very particular.. pin choice based on timer or some combination of peripherals?

Need to read deep into the DS and see, but I'm confused a bit; any simple pointer?

Thanks for your patience :)

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