ST72325R6-AUTO STMicroelectronics, ST72325R6-AUTO Datasheet - Page 51

• Manufacturer Part Number: ST72325R6-AUTO
• Description: 8-bit Mcu For Automotive With 16 To 60 Kbyte Flash, Adc, Css, 5 Timers, Spi, Sci, I2c Interface
• Manufacturer: STMicroelectronics

ST72325xxx-Auto
6.5.3
6.5.4
6.5.5
The RESET pin is an asynchronous signal which plays a major role in EMS performance. In
a noisy environment, it is recommended to follow the guidelines mentioned in
Electrical
If the external RESET pulse is shorter than t
the signal on the RESET pin may be stretched. Otherwise the delay will not be applied (see
long ext. Reset in
device RESET pin acts as an output that is pulled low during at least t
External power-on RESET
If the LVD is disabled by option byte, to start up the microcontroller correctly, the user must
ensure by means of an external reset circuit that the reset signal is held low until V
the minimum level specified for the selected f
conditions on page
A proper reset signal for a slow rising V
RC network connected to the RESET pin.
Internal low voltage detector (LVD) RESET
Two different RESET sequences caused by the internal LVD circuitry can be distinguished:
●
●
The device RESET pin acts as an output that is pulled low when V
V
The LVD filters spikes on V
Internal watchdog RESET
The RESET sequence generated by an internal Watchdog counter overflow is shown in
Figure
Starting from the Watchdog counter underflow, the device RESET pin acts as an output that
is pulled low during at least t
DD
Power-on RESET
Voltage drop RESET
< V
14.
IT-
characteristics.
(falling edge) as shown in
Figure
197).
14). Starting from the external RESET pulse recognition, the
DD
w(RSTL)out
larger than t
Figure
.
DD
g(VDD)
supply can generally be provided by an external
14.
w(RSTL)out
OSC
to avoid parasitic resets.
frequency (see
Supply, reset and clock management
(see short ext. Reset in
Section 19.3: Operating
DD
< V
w(RSTL)out
IT+
(rising edge) or
Chapter 19:
Figure
.
DD
is over
51/250
14),