ST72321AR9-Auto STMicroelectronics, ST72321AR9-Auto Datasheet - Page 37

• Manufacturer Part Number: ST72321AR9-Auto
• Description: 8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

ST72321xx-Auto
6
6.1
6.2
Figure 9.
RESET
OSC2
OSC1
EVD
V
V
DD
SS
Supply, reset and clock management
Introduction
The device includes a range of utility features for securing the application in critical
situations (for example in case of a power brown-out), and reducing the number of external
components. An overview is shown in
For more details, refer to the dedicated parametric section.
Main features
●
●
●
●
Clock, reset and supply block diagram
Optional PLL for multiplying the frequency by 2 (not to be used with internal RC
oscillator)
Reset Sequence Manager (RSM)
Multi-oscillator Clock Management (MO)
–
–
System Integrity Management (SI)
–
–
OSCILLATOR
RESET SEQUENCE
5 crystal/ceramic resonator oscillators
1 internal RC oscillator
Main supply low voltage detection (LVD)
Auxiliary voltage detector (AVD) with interrupt capability for monitoring the main
supply or the EVD pin
MULTI-
(MO)
MANAGER
(RSM)
f
OSC
(option)
PLL
Doc ID 13829 Rev 1
SICSR
AVD AVD AVD LVD
SYSTEM INTEGRITY MANAGEMENT
S
0
1
Figure
IE
AVD Interrupt Request
AUXILIARY VOLTAGE
F
9.
LOW VOLTAGE
RF
DETECTOR
DETECTOR
(AVD)
(LVD)
Supply, reset and clock management
0
0
0
WDG
f
RF
OSC2
CLOCK (MCC/RTC)
WITH REAL-TIME
TIMER (WDG)
CONTROLLER
MAIN CLOCK
WATCHDOG
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f
CPU