STM32F105xx, STM32F107xx
Pinouts and pin description
Table 5.
Pins
Pin definitions (continued)
Alternate functions(4)
Main
function(3)
(after reset)
Pin name
Default
Remap
97
98
-
-
PE0
PE1
I/O FT
PE0
PE1
TIM4_ETR
I/O FT
99 63
100 64
VSS_3
VDD_3
S
S
VSS_3
VDD_3
1. I = input, O = output, S = supply.
2. FT = 5 V tolerant. All I/Os are VDD capable.
3. Function availability depends on the chosen device.
4. If several peripherals share the same I/O pin, to avoid conflict between these alternate functions only one peripheral should
be enabled at a time through the peripheral clock enable bit (in the corresponding RCC peripheral clock enable register).
5. PC13, PC14 and PC15 are supplied through the power switch. Since the switch only sinks a limited amount of current
(3 mA), the use of GPIOs PC13 to PC15 in output mode is limited: the speed should not exceed 2 MHz with a maximum
load of 30 pF and these IOs must not be used as a current source (e.g. to drive an LED).
6. Main function after the first backup domain power-up. Later on, it depends on the contents of the Backup registers even
after reset (because these registers are not reset by the main reset). For details on how to manage these IOs, refer to the
Battery backup domain and BKP register description sections in the STM32F10xxx reference manual, available from the
STMicroelectronics website: www.st.com.
7. This alternate function can be remapped by software to some other port pins (if available on the used package). For more
details, refer to the Alternate function I/O and debug configuration section in the STM32F10xxx reference manual,
available from the STMicroelectronics website: www.st.com.
8. For the LQFP64 package, the pins number 5 and 6 are configured as OSC_IN/OSC_OUT after reset, however the
functionality of PD0 and PD1 can be remapped by software on these pins. For the LQFP100 package, PD0 and PD1 are
available by default, so there is no need for remapping. For more details, refer to Alternate function I/O and debug
configuration section in the STM32F10xxx reference manual.
Doc ID 15274 Rev 4
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