Datasheet

Electrical characteristics STM32F20xxx
108/184 DS6329 Rev 16
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 39 and
Table 48, respectively.
Unless otherwise specified, the parameters given in Table 48 are derived from tests
performed under the ambient temperature and V
DD
supply voltage conditions summarized
in
Table 14.
Table 47. Output voltage characteristics
(1)
1. PC13, PC14, PC15 and PI8 are supplied through the power switch. Since the switch only sinks a limited
amount of current (3 mA), the use of GPIOs PC13 to PC15 and PI8 in output mode is limited: the speed
must not exceed 2 MHz with a maximum load of 30 pF and these I/Os must not be used as a current
source (e.g. to drive an LED).
Symbol Parameter Conditions Min Max Unit
V
OL
(2)
2. The I
IO
current sunk by the device must always respect the absolute maximum rating specified in Table 12
and the sum of I
IO
(I/O ports and control pins) must not exceed I
VSS
.
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
CMOS ports
I
IO
= +8 mA
2.7 V < V
DD
< 3.6 V
-0.4
V
V
OH
(3)
3. The I
IO
current sourced by the device must always respect the absolute maximum rating specified in
Table 12 and the sum of I
IO
(I/O ports and control pins) must not exceed I
VDD
.
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
V
DD
–0.4 -
V
OL
(2)
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
TTL ports
I
IO
=+ 8mA
2.7 V < V
DD
< 3.6 V
-0.4
V
V
OH
(3)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
2.4 -
V
OL
(2)(4)
4. Guaranteed by characterization results, not tested in production.
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
I
IO
= +20 mA
2.7 V < V
DD
< 3.6 V
-1.3
V
V
OH
(3)(4)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
V
DD
–1.3 -
V
OL
(2)(4)
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
I
IO
= +6 mA
2 V < V
DD
< 2.7 V
-0.4
V
V
OH
(3)(4)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
V
DD
–0.4 -
Table 48. I/O AC characteristics
(1)
OSPEEDRy
[1:0] bit
value
(1)
Symbol Parameter Conditions Min Typ Max Unit
00
f
max(IO)out
Maximum frequency
(2)
C
L
= 50 pF, V
DD >
2.70 V - - 4
MHz
C
L
= 50 pF, V
DD >
1.8 V - - 2
C
L
= 10 pF, V
DD >
2.70 V - - 8
C
L
= 10 pF, V
DD >
1.8 V - - 4
t
f(IO)out
/
t
r(IO)out
Output high to low level fall
time and output low to high
level rise time
C
L
= 50 pF, V
DD
= 1.8 V to
3.6 V
- - 100 ns
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.