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ST72321J7-Auto датащи(PDF) 3 Page - STMicroelectronics

номер детали ST72321J7-Auto
подробное описание детали  PLL for 2x frequency multiplication
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производитель  STMICROELECTRONICS [STMicroelectronics]
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ST72321J7-Auto датащи(HTML) 3 Page - STMicroelectronics

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


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