Table 42. Port Bit Configuration Table; Figure 17. Basic Structure Of An I/O Port Bit - ST STM32G0 1 Series Reference Manual

RM0444
Figure 17
port bit configurations.
To/from on-chip
peripherals,
power control
and EXTI
Read
Write
Read/write
From on-chip
peripheral
MODE(i)
[1:0]
01
10
shows the basic structures of a standard I/O port bit.

Figure 17. Basic structure of an I/O port bit

Analog input/output
Digital input
Input driver
Output driver
Alternate function
output

Table 42. Port bit configuration table

OSPEED(i)
OTYPE(i)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
On/off
TTL Schmitt trigger
V
DDIOx
Output
control
V
SS
PUPD(i)
[1:0] [1:0]
0
0
1
1
SPEED
[1:0]
0
0
1
1
0
0
1
1
SPEED
[1:0]
0
0
1
1
RM0444 Rev 5
General-purpose I/Os (GPIO)
Table 42 gives the possible
V
DDIOx
on/off
on/off
P-MOS
V
N-MOS
SS
Push-pull,
open-drain
or disabled
(1)
I/O configuration
0 GP output
1 GP output
0 GP output
1 Reserved
0 GP output
1 GP output
0 GP output
1 Reserved (GP output OD)
0 AF
1 AF
0 AF
1 Reserved
0 AF
1 AF
0 AF
1 Reserved
Pull
up
I/O pin
Pull
down
MSv33182V2
PP
PP + PU
PP + PD
OD
OD + PU
OD + PD
PP
PP + PU
PP + PD
OD
OD + PU
OD + PD
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