STM32F756XX Datasheet, PDF (141/228 Pages) STMicroelectronics – ARM-based Cortex-M7 32b MCU+FPU, 462DMIPS, up to 1MB Flash/320+16+ 4KB RAM, crypto, USB OTG HS/FS, ethernet, 18 TIMs, 3 ADCs, 25 com itf, cam & LCD

STM32F756xx
Electrical characteristics
7. Pull-down resistors are designed with a true resistance in series with a switchable NMOS. This NMOS contribution to the
series resistance is minimum (~10% order).
8. Hysteresis voltage between Schmitt trigger switching levels. Guaranteed by characterization results.
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 38.
Figure 38. FT I/O input characteristics
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Output driving current
The GPIOs (general purpose input/outputs) can sink or source up to ±8 mA, and sink or
source up to ±20 mA (with a relaxed V_OL/V_OH) except PC13, PC14, PC15 and PI8 which
can sink or source up to ±3mA. When using the PC13 to PC15 and PI8 GPIOs in output
mode, the speed should not exceed 2 MHz with a maximum load of 30 pF.
In the user application, the number of I/O pins which can drive current must be limited to
respect the absolute maximum rating specified in Section 5.2. In particular:
• The sum of the currents sourced by all the I/Os on V_DD, plus the maximum Run
consumption of the MCU sourced on V_DD, cannot exceed the absolute maximum rating
ΣI_VDD (see Table 15).
• The sum of the currents sunk by all the I/Os on V_SS plus the maximum Run
consumption of the MCU sunk on V_SS cannot exceed the absolute maximum rating
ΣI_VSS (see Table 15).
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