Datasheet

Electrical characteristics STM32F050xx
70/97 Doc ID 023683 Rev 1
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 22 and
Table 4 7 , respectively.
Unless otherwise specified, the parameters given are derived from tests performed under
ambient temperature and V
DD
supply voltage conditions summarized in Table 15: General
operating conditions.
Table 47. I/O AC characteristics
(1)
OSPEEDRy
[1:0] value
(1)
Symbol Parameter Conditions Min Max Unit
x0
f
max(IO)out
Maximum frequency
(2)
C
L
= 50 pF, V
DD
= 2 V to 3.6 V - 2 MHz
t
f(IO)out
Output high to low level
fall time
C
L
= 50 pF, V
DD
= 2 V to 3.6 V
-125
(3)
ns
t
r(IO)out
Output low to high level
rise time
-125
(3)
01
f
max(IO)out
Maximum frequency
(2)
C
L
= 50 pF, V
DD
= 2 V to 3.6 V - 10 MHz
t
f(IO)out
Output high to low level
fall time
C
L
= 50 pF, V
DD
= 2 V to 3.6 V
-25
(3)
ns
t
r(IO)out
Output low to high level
rise time
-25
(3)
11
f
max(IO)out
Maximum frequency
(2)
C
L
= 30 pF, V
DD
= 2.7 V to 3.6 V - 50
MHzC
L
= 50 pF, V
DD
= 2.7 V to 3.6 V - 30
C
L
= 50 pF, V
DD
= 2 V to 2.7 V - 20
t
f(IO)out
Output high to low level
fall time
C
L
= 30 pF, V
DD
= 2.7 V to 3.6 V - 5
(3)
ns
C
L
= 50 pF, V
DD
= 2.7 V to 3.6 V - 8
(3)
C
L
= 50 pF, V
DD
= 2 V to 2.7 V - 12
(3)
t
r(IO)out
Output low to high level
rise time
C
L
= 30 pF, V
DD
= 2.7 V to 3.6 V - 5
(3)
C
L
= 50 pF, V
DD
= 2.7 V to 3.6 V - 8
(3)
C
L
= 50 pF, V
DD
= 2 V to 2.7 V - 12
(3)
FM+
configuration
(4)
f
max(IO)out
Maximum frequency
(2)
C
L
= 50 pF, V
DD
= 2 V to 3.6 V - 2
(3)
MHz
t
f(IO)out
Output high to low level
fall time
C
L
= 50 pF, V
DD
= 2 V to 3.6 V - 12
(3)
ns
t
r(IO)out
Output low to high level
rise time
C
L
= 50 pF, V
DD
= 2 V to 3.6 V - 34
(3)
t
EXTIpw
Pulse width of external
signals detected by the
EXTI controller
10 - ns
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the RM0091 reference manual for a description of
GPIO Port configuration register.
2. The maximum frequency is defined in Figure 22.
3. Guaranteed by design, not tested in production.
4. When FM+ configuration is set, the I/O speed control is bypassed. Refer to the STM32F05xxx reference manual RM0091
for a detailed description of FM+ I/O configuration.