NetduinoPlus2 Netduino, NetduinoPlus2 Datasheet - Page 109

• Manufacturer Part Number: NetduinoPlus2
• Description: Development Boards & Kits - ARM NETDUINO PLUS 2
• Manufacturer: Netduino

Specifications of NetduinoPlus2

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: STM32F405RG
• Core: ARM Cortex M4
• Interface Type: I2C, SPI, UART, USB
• Operating Supply Voltage: 7.5 v to 9 V
• Data Bus Width: 32 bit
• Description/function: Arduino form factor
• Dimensions: 2.8 in x 2.1 in
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C

STM32F405xx, STM32F407xx
5.3.17
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, R
Unless otherwise specified, the parameters given in
performed under the ambient temperature and V
in
Table 49.
1. Guaranteed by design, not tested in production.
2. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution
Figure 36. 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 V
V
V
V
T
V
V
Table
NF(NRST)
IH(NRST)
IL(NRST)
NRST_OUT
Symbol
F(NRST)
hys(NRST)
to the series resistance must be minimum
Table
R
PU
49. Otherwise the reset is not taken into account by the device.
13.
(1)
(1)
(1)
(1)
PU
NRST pin characteristics
(see
NRST Input low level voltage
NRST Input high level voltage
NRST Schmitt trigger voltage
hysteresis
Weak pull-up equivalent resistor
NRST Input filtered pulse
NRST Input not filtered pulse
Generated reset pulse duration
Table
46).
Parameter
Doc ID 022152 Rev 3
(~10% order)
(2)
.
Reset source
V
Conditions
DD
V
DD
Internal
IN
> 2.7 V
supply voltage conditions summarized
=
Table 49
V
SS
are derived from tests
IL(NRST)
–0.5
Min
300
30
20
2
-
-
Electrical characteristics
max level specified in
Typ
200
40
-
-
-
-
-
V
DD
Max
100
0.8
50
-
-
-
+0.5
109/180
Unit
mV
kΩ
ns
ns
µs
V