STM32F207ZF STMicroelectronics, STM32F207ZF Datasheet - Page 99
STM32F207ZF
Manufacturer Part Number
STM32F207ZF
Description
High-performance ARM Cortex-M3 MCU with 768 Kbytes Flash, 120 MHz CPU, ART Accelerator, Ethernet
Manufacturer
STMicroelectronics
Datasheet
1.STM32F205VE.pdf
(170 pages)
Specifications of STM32F207ZF
10/100 Ethernet Mac With Dedicated Dma
supports IEEE 1588v2 hardware, MII/RMII
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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 46.
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 38. 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
46. Otherwise the reset is not taken into account by the device.
11.
(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
43).
Parameter
Doc ID 15818 Rev 8
(~10% order)
(2)
.
Reset source
V
Conditions
DD
V
DD
Internal
IN
> 2.7 V
supply voltage conditions summarized
=
Table 46
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
99/170
Unit
mV
kΩ
ns
ns
µs
V
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