AN2491 datasheet(27/32 Pages) STMICROELECTRONICS

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AN2491

STW8110x public header file

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#ifdef __INTERFACE_I2C

// Definition of the STW8110x I2C ReadOnly register

typedef struct

{

t_stw8110x_Device_TypeDEV_TYPE; // Device identifier bit

t_stw8110x_PLL_StatusLOCK_DET; // '1' when PLL is locked

t_uint8

INT_CAL; // internal value of VCO control word

} t_stw8110x_I2C_RO_reg ;

#endif //__INTERFACE_I2C

//*****************************************************************

// -------STW8110x Hardware Access Definitions-------

//*****************************************************************

#ifdef __INTERFACE_SPI

// Description:

// ST1 - reference divider, VCO amplitude, VCO Calibration,

// Charge Pump current,Prescaler Modulus

#define bwREF_CLK_DIV_RATIO

10 // Reference clock divider ratio

#define bwPLL_A

2 // VCO Amplitude control

#define bwCPSEL

3 // charge pump output current control

#define bwPSC_SEL

1 // Prescaler modulus select

#define bwINITCAL

1 // Test purpose only,must be set to 0

#define bwSERCAL

1 // VCO Calibration Enable

#define bwSELEXTCAL

1 // Test purpose only,must be set to 0

#define bwCAL

5 // Test purpose only,must be set to 0

#define bsREF_CLK_DIV_RATIO 14 // Reference clock divider ratio

#define bsPLL_A

12 // VCO Amplitude control

#define bsCPSEL

9 // charge pump output current control

#define bsPSC_SEL

8 // Prescaler modulus select

#define bsINITCAL

7 // Test purpose only,must be set to 0

#define bsSERCAL

6 // VCO Calibration Enable

#define bsSELEXTCAL

5 // Test purpose only,must be set to 0

#define bsCAL

0 // Test purpose only,must be set to 0

// Description:

// ST2 - Functional modes, VCO dividers

#define bwPD

7 // Functional mode

#define bwcount_B

12// swallow counter

#define bwcount_A

5 // main counter

#define bsPD

17// Functional mode

#define bscount_B

5 // swallow counter

#define bscount_A

0 // main counter

#endif //__INTERFACE_SPI

#ifdef __INTERFACE_I2C

// REG0

#define bwPD

7 // Reference clock divider ratio

#define bwcount_B11

1 // main counter

#define bsPD

1 // Test purpose only, must be set to 0

#define bscount_B11

0 // main counter

AN2491 Datasheet(PDF) 27 Page - STMicroelectronics

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