STM32F051X4 STMICROELECTRONICS [STMicroelectronics], STM32F051X4 Datasheet - Page 73

• Manufacturer Part Number: STM32F051X4
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Electrical characteristics
Table 52.
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0091 reference manual for a description of
2. The maximum frequency is defined in
3. Guaranteed by design, not tested in production.
4. The I/O speed configuration is bypassed in FM+ I/O mode. Refer to the STM32F05xxx reference manual RM0091 for a
74/105
[1:0] value
configuration
OSPEEDRy
GPIO Port configuration register.
description of FM+ I/O mode configuration.
FM+
x0
01
11
(4)
(1)
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in
Table
Unless otherwise specified, the parameters given are derived from tests performed under
ambient temperature and V
I/O AC characteristics
f
f
f
f
max(IO)out
max(IO)out
max(IO)out
max(IO)out
Symbol
t
t
t
t
t
t
t
t
t
EXTIpw
f(IO)out
r(IO)out
f(IO)out
r(IO)out
f(IO)out
r(IO)out
f(IO)out
r(IO)out
52, respectively.
Maximum frequency
Output high to low level
fall time
Output low to high level
rise time
Maximum frequency
Output high to low level
fall time
Output low to high level
rise time
Maximum frequency
Output high to low level
fall time
Output low to high level
rise time
Maximum frequency
Output high to low level
fall time
Output low to high level
rise time
Pulse width of external
signals detected by the
EXTI controller
Parameter
Figure
(1)
20.
DD
Doc ID 022265 Rev 3
supply voltage conditions summarized in
(2)
(2)
(2)
(2)
C
C
C
C
C
C
C
C
C
C
C
C
C
TBD
TBD
TBD
L
L
L
L
L
L
L
L
L
L
L
L
L
= 50 pF, V
= 50 pF, V
= 50 pF, V
= 50 pF, V
= 30 pF, V
= 50 pF, V
= 50 pF, V
= 30 pF, V
= 50 pF, V
= 50 pF, V
= 30 pF, V
= 50 pF, V
= 50 pF, V
Conditions
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= 2.7 V to 3.6 V
= 2 V to 2.7 V
= 2 V to 3.6 V
= 2 V to 3.6 V
= 2 V to 3.6 V
= 2 V to 3.6 V
= 2.7 V to 3.6 V
= 2.7 V to 3.6 V
= 2 V to 2.7 V
= 2.7 V to 3.6 V
= 2.7 V to 3.6 V
= 2 V to 2.7 V
= 2.7 V to 3.6 V
Figure 20
Table
Min
10
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
STM32F051x
20.
125
125
25
25
12
12
Max
TBD
TBD
TBD
5
8
5
8
10
50
30
20
2
(3)
(3)
(3)
(3)
-
(3)
(3)
(3)
(3)
(3)
(3)
and
MHz
MHz
MHz
MHz
MHz
MHz
Unit
ns
ns
ns
ns
ns