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TDA7326D 数据表(PDF) 10 Page - STMicroelectronics |
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TDA7326D 数据表(HTML) 10 Page - STMicroelectronics |
10 / 16 page 5.0 FREQUENCY PROGRAMMATION 5.1 AM/FM Computation Resume where: PC = Program Counter Value (PC7 to PC0) SC = Swallow Counter Value (SC5 to SC0) DIV_VAL = Divider Factor Loading registers for 11 or 12 bits of the programmable counters 1 0 PC5 PC4 PC3 PC2 PC1 PC0 1 1 SC5 (0)* SC4 SC3 SC2 SC1 SC0 Loading registers for 5 or 6 bits of the programmable counters 11 SC5 (0)* SC4 SC3 SC2 SC1 SC0 Setting control register for loop filter selection charge pump current bit 1, mode AM/FM selection 01 X X LPF2/ LPF1 CURR1 SWM/ DIR AM FM Test mode inizialization (Test0 = Test1 = Test2 = 0) 0 0 TST0 TST1 TST2 SOUT CURR2 fREF Setting control register for switch output pin 9, charge pump current bit 2, reference frequency select 000 0 0 SOUT CURR2 fREF (*) This bit has to be ”0” for fREF =”1” (fREF = 25kHz in FM mode or 2.5KHz AM swallow mode) Loading registers for all bytes of the programmable counters and all control registers 0 1 PC7 PC6 LPF1/ LPF2 CURR1 SWM DIR AM FM 1 0 PC5 PC4 PC3 PC2 PC1 PCO ⇒ ® 11 SC5 (0)* SC4 SC3 SC2 SC1 SC0 0 0 0 0 0 SOUT CURR2 fref 4.0 BIT ORGANIZATION OF THE BUS TRANSFER OPERATION Loading registers for all bytes of the programmable counters and all control registers 0 1 PC7 PC6 LPF2/ LPF1 CURR1 SWM DIR AM FM 1 0 PC5 PC4 PC3 PC2 PC1 PCO ⇒ ® 11 SC5 (0)* SC4 SC3 SC2 SC1 SC0 fREF = 12.5KHz FVCO = (64 ⋅ PC + SC + 64) ⋅ fREF FM SWALLOW MODE FVCO = (DIV_VAL+ 64) ⋅ fREF swallow 6bit fREF = 25KHz FVCO = (32 ⋅ PC + SC + 32) ⋅ fREF FVCO = (DIV_VAL+ 32) ⋅ fREF swallow 5bit (bit SC5 = 0) TDA7326 10/16 |
类似零件编号 - TDA7326D |
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类似说明 - TDA7326D |
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