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STM32469VG Datasheet(PDF) 140 Page - STMicroelectronics

Part # STM32469VG
Description  Arm® Cortex®-M4 32b MCUFPU, 225DMIPS, up to 2MB Flash/3844KB RAM, USB OTG HS/FS, Ethernet, FMC, dual Quad-SPI, Graphical accelerator, Camera IF, LCD-TFT & MIPI DSI
PDF  220 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32469VG Datasheet(HTML) 140 Page - STMicroelectronics

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Electrical characteristics
STM32F469xx
140/220
DS11189 Rev 7
5.3.21
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 58).
Unless otherwise specified, the parameters given in Table 61 are derived from tests
performed under the ambient temperature and VDD supply voltage conditions summarized
in Table 17.
Figure 41. Recommended NRST pin protection
1. The reset network protects the device against parasitic resets.
2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in
Table 58. Otherwise the reset is not taken into account by the device.
Table 61. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
RPU
Weak pull-up equivalent resistor(1)
VIN VSS
30
40
50
k
VF(NRST)(2) NRST Input filtered pulse
-
-
-
100
ns
VNF(NRST)(2) NRST Input not filtered pulse
VDD > 2.7 V
300
-
-
TNRST_OUT Generated reset pulse duration
Internal Reset source
20
-
-
µs
1. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to the series
resistance must be minimum (~10%).
2. Guaranteed by design.
ai14132c
STM32F
RPU
NRST(2)
VDD
Filter
Internal Reset
0.1 μF
External
reset circuit (1)



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