ST72361AR9-Auto STMicroelectronics, ST72361AR9-Auto Datasheet - Page 42

• Manufacturer Part Number: ST72361AR9-Auto
• Description: 8-bit MCU for automotive with K Flash, 10-bit ADC, 5 Timers, SPI, 2x LINSCI
• Manufacturer: STMicroelectronics

Specifications of ST72361AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

Supply, reset and clock management
5.5.2
5.5.3
5.5.4
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The reset vector fetch phase duration is two clock cycles.
Figure 12. RESET sequence phases
Asynchronous external RESET pin
The RESET pin is both an input and an open-drain output with integrated R
resistor. This pull-up has no fixed value but varies in accordance with the input voltage. It
can be pulled low by external circuitry to reset the device. See
characteristics
A reset signal originating from an external source must have a duration of at least t
in order to be recognized (see
MCU can enter reset state even in HALT mode.
Figure 13. Reset block diagram
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 the electrical
characteristics section.
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
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:
●
●
Power-on reset
Voltage drop reset
RESET
for more details.
V
DD
Active Phase
R
ON
Doc ID 12468 Rev 3
Figure
256 or 4096 CLOCK CYCLES
Filter
14). This detection is asynchronous and therefore the
DD
INTERNAL RESET
RESET
supply can generally be provided by an external
OSC
GENERATOR
frequency.
PULSE
VECTOR
FETCH
Chapter 20: Electrical
WATCHDOG RESET
LVD RESET
ST72361xx-Auto
INTERNAL
RESET
ON
weak pull-up
DD
h(RSTL)in
is over