UM1561 datasheet(24/39 Pages) STMICROELECTRONICS

24 / 39 page

Implementation of digital phase locked loop

UM1561

24/39

Doc ID 023556 Rev 1

0x9593, 0x9674, 0x975A, 0x9843, 0x9931, 0x9A23, 0x9B18, 0x9C11, 0x9D0E,

0x9E0F, 0x9F14, 0xA01D, 0xA129, 0xA239, 0xA34C, 0xA463,

0xA57E, 0xA69C, 0xA7BE, 0xA8E3, 0xAA0B, 0xAB36, 0xAC65, 0xAD97, 0xAECD,

0xB005, 0xB141, 0xB27F, 0xB3C1, 0xB505, 0xB64C, 0xB797,

0xB8E4, 0xBA33, 0xBB86, 0xBCDB, 0xBE32, 0xBF8D, 0xC0E9, 0xC248, 0xC3AA,

0xC50E, 0xC674, 0xC7DC, 0xC946, 0xCAB3, 0xCC22, 0xCD92,

0xCF05, 0xD079, 0xD1EF, 0xD368, 0xD4E1, 0xD65D, 0xD7DA, 0xD958, 0xDAD8,

0xDC5A, 0xDDDD, 0xDF61, 0xE0E7, 0xE26D, 0xE3F5, 0xE57E,

0xE708, 0xE893, 0xEA1E, 0xEBAB, 0xED38, 0xEEC7, 0xF055, 0xF1E5, 0xF375,

0xF505, 0xF696, 0xF827, 0xF9B9, 0xFB4A, 0xFCDC, 0xFE6E,

0x0000, 0x0192, 0x0324, 0x04B6, 0x0647, 0x07D9, 0x096A, 0x0AFB, 0x0C8B,

0x0E1B, 0x0FAB, 0x1139, 0x12C8, 0x1455, 0x15E2, 0x176D,

0x18F8, 0x1A82, 0x1C0B, 0x1D93, 0x1F19, 0x209F, 0x2223, 0x23A6, 0x2528,

0x26A8, 0x2826, 0x29A3, 0x2B1F, 0x2C98, 0x2E11, 0x2F87,

0x30FB, 0x326E, 0x33DE, 0x354D, 0x36BA, 0x3824, 0x398C, 0x3AF2, 0x3C56,

0x3DB8, 0x3F17, 0x4073, 0x41CE, 0x4325, 0x447A, 0x45CD,

0x471C, 0x4869, 0x49B4, 0x4AFB, 0x4C3F, 0x4D81, 0x4EBF, 0x4FFB, 0x5133,

0x5269, 0x539B, 0x54CA, 0x55F5, 0x571D, 0x5842, 0x5964,

0x5A82, 0x5B9D, 0x5CB4, 0x5DC7, 0x5ED7, 0x5FE3, 0x60EC, 0x61F1, 0x62F2,

0x63EF, 0x64E8, 0x65DD, 0x66CF, 0x67BD, 0x68A6, 0x698C,

0x6A6D, 0x6B4A, 0x6C24, 0x6CF9, 0x6DCA, 0x6E96, 0x6F5F, 0x7023, 0x70E2,

0x719E, 0x7255, 0x7307, 0x73B5, 0x745F, 0x7504, 0x75A5,

0x7641, 0x76D9, 0x776C, 0x77FA, 0x7884, 0x7909, 0x798A, 0x7A05, 0x7A7D,

0x7AEF, 0x7B5D, 0x7BC5, 0x7C29, 0x7C89, 0x7CE3, 0x7D39,

0x7D8A, 0x7DD6, 0x7E1D, 0x7E5F, 0x7E9D, 0x7ED5, 0x7F09, 0x7F38, 0x7F62,

0x7F87, 0x7FA7, 0x7FC2, 0x7FD8, 0x7FE9, 0x7FF6, 0x7FFD,

0x7FFF, 0x7FFD, 0x7FF6, 0x7FE9, 0x7FD8, 0x7FC2, 0x7FA7, 0x7F87, 0x7F62,

0x7F38, 0x7F09, 0x7ED5, 0x7E9D, 0x7E5F, 0x7E1D, 0x7DD6,

0x7D8A, 0x7D39, 0x7CE3, 0x7C89, 0x7C29, 0x7BC5, 0x7B5D, 0x7AEF, 0x7A7D,

0x7A05, 0x798A, 0x7909, 0x7884, 0x77FA, 0x776C, 0x76D9,

0x7641, 0x75A5, 0x7504, 0x745F, 0x73B5, 0x7307, 0x7255, 0x719E, 0x70E2,

0x7023, 0x6F5F, 0x6E96, 0x6DCA, 0x6CF9, 0x6C24, 0x6B4A,

0x6A6D, 0x698C, 0x68A6, 0x67BD, 0x66CF, 0x65DD, 0x64E8, 0x63EF, 0x62F2,

0x61F1, 0x60EC, 0x5FE3, 0x5ED7, 0x5DC7, 0x5CB4, 0x5B9D,

0x5A82, 0x5964, 0x5842, 0x571D, 0x55F5, 0x54CA, 0x539B, 0x5269, 0x5133,

0x4FFB, 0x4EBF, 0x4D81, 0x4C3F, 0x4AFB, 0x49B4, 0x4869,

0x471C, 0x45CD, 0x447A, 0x4325, 0x41CE, 0x4073, 0x3F17, 0x3DB8, 0x3C56,

0x3AF2, 0x398C, 0x3824, 0x36BA, 0x354D, 0x33DE, 0x326E,

0x30FB, 0x2F87, 0x2E11, 0x2C98, 0x2B1F, 0x29A3, 0x2826, 0x26A8, 0x2528,

0x23A6, 0x2223, 0x209F, 0x1F19, 0x1D93, 0x1C0B, 0x1A82,

0x18F8, 0x176D, 0x15E2, 0x1455, 0x12C8, 0x1139, 0x0FAB, 0x0E1B, 0x0C8B,

0x0AFB, 0x096A, 0x07D9, 0x0647, 0x04B6, 0x0324, 0x0192,

};

Calc_Theta_Grid (….):

The main function “Calc_Theta_Grid()” includes the code for the grid angle estimation and

anti-islanding protection:

void Calc_Theta_Grid(s16 Input_Integration)

{

static s32 Delta_Theta_tmp=0;

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