ST STM32F301 6 Series Reference Manual page 127

RM0366
Analog
To on-chip
peripheral
Alternate function input
Read
Write
Read/write
From on-chip
Alternate function output
peripheral
To on-chip
peripheral
Read
Write
Read/write
From on-chip
peripheral
1. V is a potential specific to 5-Volt tolerant I/Os and different from V
DD_FT
Figure 14. Basic structure of an I/O port bit
Input driver
Output driver
Figure 15. Basic structure of a 5-Volt tolerant I/O port bit
Analog
Alternate function input
Input driver
Output driver
Alternate function output
on/off
trigger
V
DD
P-MOS
Output
control
N-MOS
V
SS
Push-pull,
open-drain or
disabled
on/off
TTL Schmitt
trigger
V
DD
P-MOS
Output
control
N-MOS
V
SS
Push-pull,
open-drain or
disabled
.
DD
RM0366 Rev 5
General-purpose I/Os (GPIO)
V
DD
V
DD
Protection
on/off
diode
Pull
up
on/off
Protection
Pull
down
diode
V
SS
V
SS
Analog
(1)
V
V
DD_FT
DD
Protection
on/off
diode
Pull
up
I/O pin
on/off
Protection
Pull
down
diode
V
SS
V
SS
Analog
ai15939b
I/O pin
ai15938
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