ST STM32F2 User Manual

UM1940
HAL WWDG Generic Driver
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49 HAL WWDG Generic Driver
49.1 WWDG Firmware driver registers structures
49.1.1 WWDG_InitTypeDef
Data Fields
uint32_t Prescaler
uint32_t Window
uint32_t Counter
uint32_t EWIMode
Field Documentation
uint32_t WWDG_InitTypeDef::Prescaler
Specifies the prescaler value of the WWDG. This parameter can be a value of
WWDG_Prescaler
uint32_t WWDG_InitTypeDef::Window
Specifies the WWDG window value to be compared to the downcounter. This
parameter must be a number Min_Data = 0x40 and Max_Data = 0x7F
uint32_t WWDG_InitTypeDef::Counter
Specifies the WWDG free-running downcounter value. This parameter must be a
number between Min_Data = 0x40 and Max_Data = 0x7F
uint32_t WWDG_InitTypeDef::EWIMode
Specifies if WWDG Early Wakeup Interupt is enable or not. This parameter can be a
value of WWDG_EWI_Mode
49.1.2 WWDG_HandleTypeDef
Data Fields
WWDG_TypeDef * Instance
WWDG_InitTypeDef Init
Field Documentation
WWDG_TypeDef* WWDG_HandleTypeDef::Instance
Register base address
WWDG_InitTypeDef WWDG_HandleTypeDef::Init
WWDG required parameters
49.2 WWDG Firmware driver API description
49.2.1 WWDG specific features
Once enabled the WWDG generates a system reset on expiry of a programmed time
period, unless the program refreshes the counter (downcounter) before reaching 0x3F
value (i.e. a reset is generated when the counter value rolls over from 0x40 to 0x3F).
An MCU reset is also generated if the counter value is refreshed before the counter
has reached the refresh window value. This implies that the counter must be refreshed
in a limited window.
Once enabled the WWDG cannot be disabled except by a system reset.
WWDGRST flag in RCC_CSR register can be used to inform when a WWDG reset
occurs.

ST STM32F2 Specifications

General

Brand	ST
Model	STM32F2
Category	Microcontrollers
Language	English