ST72321J9-Auto STMicroelectronics, ST72321J9-Auto Datasheet - Page 4
ST72321J9-Auto
Manufacturer Part Number
ST72321J9-Auto
Description
8-bit MCU for automotive with 60 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
Manufacturer
STMicroelectronics
Datasheet
1.ST72321R9-AUTO.pdf
(243 pages)
Specifications of ST72321J9-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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Contents
10
11
12
4/243
9.2
9.3
9.4
9.5
Watchdog timer (WDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
Main clock controller with real-time clock and beeper (MCC/RTC) . . 82
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
PWM auto-reload timer (ART) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.1
12.2
Beeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
9.2.1
9.2.2
9.2.3
I/O port implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
How to program the watchdog timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Hardware watchdog option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Using Halt mode with the WDG (WDGHALT option) . . . . . . . . . . . . . . . . 80
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
10.9.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Programmable CPU clock prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Clock-out capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Real-time clock timer (RTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Main clock controller registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
11.8.1
11.8.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Input modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Output modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Control register (WDGCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
MCC control/status register (MCCSR) . . . . . . . . . . . . . . . . . . . . . . . . . . 84
MCC beep control register (MCCBCR) . . . . . . . . . . . . . . . . . . . . . . . . . 85
Doc ID 13829 Rev 1
ST72321xx-Auto
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