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STA002 数据表(PDF) 41 Page - STMicroelectronics |
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STA002 数据表(HTML) 41 Page - STMicroelectronics |
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41 / 43 page ![]() NRXI Electrical Characteristics Symbol Parameter Min. Typ. Max. Unit Note Cm Common Mode Voltage VDD -0.5 V 1 Cmr Common Mode Voltage Range VDD -2 VDD -0.3 V 2 DiV Differential Input Voltage 1V Peak to Peak V Note 1: VA = VB Open circuit voltage Note 2; VA = VB INPUT PIN CAPACITANCE A/AI 4pF 8.7 APPLICATION NOTE (Registers preset) According to the choosen M_CLK frequency some registers values must be changed. Table 7 shows two different presets for M_CLK = 39.0268MHz and M_CLK = 14.72MHz Table 7: HEX_COD DEC_COD REGISTER NAME M_CLK = 39.0268MHz PRESET M_CLK = 14.72MHz PRESET 80H 128 QPSK_CONTROL1 38H 38H 81H 129 QPSK_CONTROL2 50H 50H 82H 130 AGC1_REF1 C8H C8H 83H 131 AGC1_REF2 00H 00H 84H 132 AGC1_BETA 05H 05H 8AH 138 SYM_FREQ1 D3H 00H 8BH 139 SYM_FREQ2 11H 00H 8CH 140 SYM_FREQ_ 0CH 10H 8DH 141 TIM_FLT_PAR 44H 44H 8FH 143 CAR_FLT_PAR 22H 22H 90H 144 IF_FREQ1 37H 00H 91H 145 IF_FREQ2 1DH 00H 92H 146 IF_FREQ3 C1H 00H 93H 147 IF_FREQ4 00H 01H 95H 149 RAMP_CTRL 20H 20H 200H 512 TDM_TRSH1 3CH 3CH 201H 513 TDM_TRSH2 3CH 3CH 202H 514 PRC_TRSH1 20H 20H 203H 515 PRC_TRSH2 20H 20H 21EH 542 PLL_INT_REG 00H 01H 220H 544 RESERVED1 06H 06H 223H 547 RESERVED4 02H 02H STA002 41/43 |
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