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STM32F042x4 STM32F042x6
Electrical characteristics
89
All I/Os are CMOS- and TTL-compliant (no software configuration required). Their
characteristics cover more than the strict CMOS-technology or TTL parameters. The
coverage of these requirements is shown in
for standard I/Os, and in
for
5 V-tolerant I/Os. The following curves are design simulation results, not tested in
production.
R
PD
Weak pull-down
equivalent
resistor
V
IN
= - V
DDIOx
25
40
55
k
Ω
C
IO
I/O pin capacitance
-
-
5
-
pF
1. Data based on design simulation only. Not tested in production.
2. The leakage could be higher than the maximum value, if negative current is injected on adjacent pins. Refer to
I/O current injection susceptibility
.
3. Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. This
PMOS/NMOS contribution to the series resistance is minimal (~10% order).
Table 50. I/O static characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit