UM0097 datasheet(35/229 Pages) STMICROELECTRONICS

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UM0097

Peripheral firmware overview

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Table 19 describes the RCCU flags.

Reset sources

The following enumeration defines the RCCU reset sources. RCCU_ResetSources

enumeration is defined in the file 71x_rccu.h:

typedef enum {

RCCU_ExternalReset = 0x00000000,

RCCU_SoftwareReset = 0x00000020,

RCCU_WDGReset = 0x00000040,

RCCU_RTCAlarmReset = 0x00000080,

RCCU_LVDReset = 0x00000200,

RCCU_WKPReset = 0x00000400

}RCCU_ResetSources;

Table 20 describes the RCCU reset sources.

PLL1 free running modes

The following enumeration defines the PLL1 free dunning modes.

RCCU_PLL1FreeRunningModes enumeration is declared in the file 71x_rccu.h:

typedef enum {

RCCU_PLL1FreeRunning125,

RCCU_PLL1FreeRunning250,

RCCU_PLL1FreeRunning500

}RCCU_PLL1FreeRunningModes;

Table 19.

RCCU flags

RCCU flag

Description

RCCU_PLL1_LOCK

PLL1 lock interrupt pending flag

RCCU_CKAF_ST

CK_AF Status

RCCU_PLL1_LOCK_I

PLL1 Lock Interrupt pending bit

RCCU_CKAF_I

Clock alternate function switching interrupt pending flag

RCCU_CK2_16_I

Clock2/16 switching interrupt pending flag

RCCU_STOP_I

Stop Interrupt pending bit

Table 20.

RCCU reset sources

Description

RCCU_ExternalReset

Reset caused by external pin

RCCU_SoftwareReset

Reset caused by software

RCCU_WDGReset

Reset caused by Watchdog

RCCU_RTCAlarmReset

Reset caused by RTC to wake-up the system from StandBy mode

RCCU_LVDReset

Reset caused by LVD

RCCU_WKPReset

Reset caused by wake-up pin to wake-up the system from StandBy

mode

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