STMicroelectronics STM32F05 series User Manual

General-purpose I/Os (GPIO) RM0091
120/742 Doc ID 018940 Rev 1
8.3.1 General-purpose I/O (GPIO)
During and just after reset, the alternate functions are not active and the I/O ports are
configured in input floating mode.
The debug pins are in AF pull-up/pull-down after reset:
● PA14: SWCLK in pull-down
● PA13: SWDAT in pull-up
When the pin is configured as output, the value written to the output data register
(GPIOx_ODR) is output on the I/O pin. It is possible to use the output driver in push-pull
mode or open-drain mode (only the low level is driven, high level is HI-Z).
Table 20. Port bit configuration table
(1)
1. GP = general-purpose, PP = push-pull, PU = pull-up, PD = pull-down, OD = open-drain, AF = alternate
function.
MODER(i)
[1:0]
OTYPER(i)
OSPEEDR(i)
[B:A]
PUPDR(i)
[1:0]
I/O configuration
01
0
SPEED
[B:A]
0 0 GP output PP
0 0 1 GP output PP + PU
0 1 0 GP output PP + PD
0 1 1 Reserved
1 0 0 GP output OD
1 0 1 GP output OD + PU
1 1 0 GP output OD + PD
1 1 1 Reserved (GP output OD)
10
0
SPEED
[B:A]
0 0 AF PP
0 0 1 AF PP + PU
0 1 0 AF PP + PD
011Reserved
100AFOD
101AFOD + PU
110AFOD + PD
111Reserved
00
x x x 0 0 Input Floating
x x x 0 1 Input PU
x x x 1 0 Input PD
x x x 1 1 Reserved (input floating)
11
x x x 0 0 Input/output Analog
xxx01
Reservedxxx10
xxx11

STMicroelectronics STM32F05 series Specifications

General

Brand	STMicroelectronics
Model	STM32F05 series
Category	Microcontrollers
Language	English