ST72325K4-Auto datasheet(3/243 Pages) STMICROELECTRONICS | SCI asynchronous serial interface

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ST72325K4-Auto Datasheet(PDF) 3 Page - STMicroelectronics

Part #	ST72325K4-Auto

Description	SCI asynchronous serial interface

Download	243 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Contents

Doc ID 13770 Rev 3

3/243

6.4

Multi-oscillator (MO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

6.5

Reset sequence manager (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.5.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.5.2

Asynchronous external RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.5.3

External power-on RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.5.4

Internal low voltage detector (LVD) RESET . . . . . . . . . . . . . . . . . . . . . . 46

6.5.5

Internal watchdog RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.6

System integrity management (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.6.1

Low voltage detector (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

6.6.2

Auxiliary voltage detector (AVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6.6.3

Clock security system (CSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

6.6.4

Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.6.5

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6.6.6

System Integrity (SI) Control/Status register (SICSR) . . . . . . . . . . . . . . 52

7

Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7.2

Masking and processing flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7.3

Interrupts and low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.4

Concurrent and nested management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.5

Interrupt register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.5.1

CPU CC register interrupt bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.5.2

Interrupt software priority registers (ISPRx) . . . . . . . . . . . . . . . . . . . . . . 59

7.6

External interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

7.6.1

I/O port interrupt sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

7.6.2

External interrupt control register (EICR) . . . . . . . . . . . . . . . . . . . . . . . . 63

8

Power saving modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.2

Slow mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.3

Wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

8.4

Active Halt and Halt modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8.4.1

Active Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.4.2

Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9

I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Similar Part No. - ST72325K4-Auto

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