TDA1004X_CONFC1
tda1004x_write_mask(state, TDA1004X_CONFC1, 0x40, 0); // set polarity of VAGC signal
tda1004x_write_mask(state, TDA1004X_CONFC1, 0x80, 0x80); // enable pulse killer
tda1004x_write_mask(state, TDA1004X_CONFC1, 0x10, 0); // VAGC polarity
tda1004x_write_byteI(state, TDA1004X_CONFC1, 0x88); // enable pulse killer
tda1004x_write_mask(state, TDA1004X_CONFC1, 0x20, 0);
tda1004x_write_mask(state, TDA1004X_CONFC1, 0x20, 0x20);
if (tda1004x_read_byte(state, TDA1004X_CONFC1) & 0x20)