Datasheet

Electrical characteristics STM32H743xI
128/226 DocID030538 Rev 3
6.3.15 I/O port characteristics
General input/output characteristics
Unless otherwise specified, the parameters given in Table 58: I/O static characteristics are
derived from tests performed under the conditions summarized in Table 23: General
operating conditions. All I/Os are CMOS and TTL compliant (except for BOOT0).
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 for FT I/Os is shown in Figure 20.
Table 58. I/O static characteristics
Symbol Parameter Condition Min Typ Max Unit
V
IL
(1)
I/O input low level voltage except
BOOT0
1.62 V<V
DD
<3.6 V
- - 0.3xV
DD
V
I/O input low level voltage except
BOOT0
--
0.4xV
DD

0.1
BOOT0 I/O input low level voltage - -
0.19xV
DD
+0.1
V
IH
(1)
I/O input high level voltage except
BOOT0
1.62 V<V
DD
<3.6 V
0.7xV
DD
--
V
I/O input low level voltage except
BOOT0
0.47xV
DD
+
0.25
--
BOOT0 I/O input high level
voltage
0.17xV
DD
+
0.6
--
V
HYS
(1)
TT_xx, FT_xxx and NRST I/O
input hysteresis
1.62 V< V
DD
<3.6 V
- 250 -
mV
BOOT0 I/O input hysteresis - 200 -
R
PU
Weak pull-up equivalent
resistor
(2)
V
IN
=V
SS
30 40 50
k
R
PD
Weak pull-down equivalent
resistor
(2)
V
IN
=V
DD
(3)
30 40 50
C
IO
I/O pin capacitance - - 5 - pF
1. Guaranteed by design.
2. The 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).
3. Max(VDDXXX) is the maximum value of all the I/O supplies.
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