ST72321R6-Auto STMicroelectronics, ST72321R6-Auto Datasheet - Page 3
ST72321R6-Auto
Manufacturer Part Number
ST72321R6-Auto
Description
8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
Manufacturer
STMicroelectronics
Datasheet
1.ST72321R9-AUTO.pdf
(243 pages)
Specifications of ST72321R6-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
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ST72321xx-Auto
7
8
9
6.4
6.5
6.6
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.1
7.2
7.3
7.4
7.5
7.6
Power saving modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.1
8.2
8.3
8.4
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
9.1
Multi-oscillator (MO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Reset sequence manager (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
System integrity management (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.6.1
6.6.2
6.6.3
6.6.4
6.6.5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Masking and processing flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Interrupts and low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Concurrent and nested management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Interrupt register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.5.1
7.5.2
External interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.6.1
7.6.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Slow mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Active Halt and Halt modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.4.1
8.4.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Asynchronous external RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
External power-on RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Internal low voltage detector (LVD) RESET . . . . . . . . . . . . . . . . . . . . . . 41
Internal watchdog RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Low voltage detector (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Auxiliary voltage detector (AVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
System Integrity (SI) Control/Status register (SICSR) . . . . . . . . . . . . . . 47
CPU CC register interrupt bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Interrupt software priority registers (ISPRx) . . . . . . . . . . . . . . . . . . . . . . 54
I/O port interrupt sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
External interrupt control register (EICR) . . . . . . . . . . . . . . . . . . . . . . . . 59
Active Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Doc ID 13829 Rev 1
Contents
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