AN2491 datasheet(12/32 Pages) STMICROELECTRONICS

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Structures

AN2491

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Structures

4.1

Both modes

t_stw8110x_Registers

Defines the structure of STW8110x registers.

typedef struct

{

#ifdef __INTERFACE_I2C

t_uint8 REG0; // Functional modes

t_uint8 REG1; // B counter

t_uint8 REG2; // A counter

t_uint8 REG3; // Reference divider

t_uint8 REG4; // Control

t_uint8 REG5; // Calibration

t_uint8 REGRO; // Read only register: internal calibration of

VCO, PLL state (locked,unlocked), Device ID

#endif

//__INTERFACE_I2C

#ifdef __INTERFACE_SPI

ST1: reference divider, VCO amplitude, VCO Calibration,

Charge Pump current, Prescaler Modulus

t_uint32 ST1;

ST2: Functional modes, VCO dividers

// __INTERFACE_SPI

#endif

t_uint32 ST2;

} t_stw8110x_Registers ;

t_stw8110x_Config

Defines the structure that holds essential transfer parameters for device configuration.

typedef struct

{

t_bool

DEFAULT_CONFIG;

t_SERCAL

VCO_CALIBRATION_EN;

t_PD

DEVICE_FUNCTIONAL_MODE;

t_uint32

MAIN_COUNTER;

t_uint32

SWALLOW_COUNTER;

t_uint32

REF_CLOCK_DIV_RATIO;

t_PLL_A

VCO_AMPLITUDE_VOLTAGE;

t_CP_SEL

CHARGE_PUMP_CURRENT;

t_PSC_SEL

PRESCALER_MODULUS;

} t_stw8110x_Config ;

Note:

If the field DEFAULT_CONFIG is marked as BOOL_TRUE then the remaining fields

following it may not be used and may not be filled up. Instead the default configuration for

the device (as programmed in STW8110x_Init) will be used. The default configuration is

described in the STW81101, STW81102 and STW81103 datasheets.

AN2491 Datasheet(PDF) 12 Page - STMicroelectronics

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