STM32L-DISCOVERY STMicroelectronics, STM32L-DISCOVERY Datasheet - Page 95

• Manufacturer Part Number: STM32L-DISCOVERY
• Description: BOARD, EVAL, STM32L-DISCOVERY
• Manufacturer: STMicroelectronics
• Series: STM32r
• Type: MCUr

Specifications of STM32L-DISCOVERY

• Kit Contents: Board, Debugger, Programmer And Compiler
• Features: 128KB Flash Plus Multiple Timers, Analogue Peripherals
• Silicon Manufacturer: ST Micro
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: STM32
• Silicon Family Name: STM32F1xx
• Rohs Compliant: Yes
• Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STM32L
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STM32F205xx, STM32F207xx
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 44.
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 37. Recommended NRST pin protection
2. The reset network protects the device against parasitic resets.
3. 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
44. Otherwise the reset is not taken into account by the device.
10.
(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
41).
Parameter
Doc ID 15818 Rev 6
(~10% order)
(2)
.
Reset source
V
Conditions
DD
V
DD
Internal
IN
> 2.7 V
supply voltage conditions summarized
=
Table 44
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
95/163
Unit
mV
kΩ
ns
ns
µs
V