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Zakładka z wyszukiwarką danych komponentów |
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MAX2121B Arkusz danych(PDF) 10 Page - Maxim Integrated Products |
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MAX2121B Arkusz danych(HTML) 10 Page - Maxim Integrated Products |
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10 / 20 page  Detailed Description Register Description The MAX2121B includes 12 user-programmable registers and two read-only registers. See Table 1 for register con- figurations. The register configuration of Table 1 shows each bit name and the bit usage information for all regis- ters. Note that all registers must be written after and no earlier than 100μs after the device is powered up. The VCO autoselection circuit is triggered by writing to register 5. Thus register 5 should be the last register to be written in order to ensure proper PLL lock. X = Don’t care. 0 = Set to 0 for factory-tested operation. 1 = Set to 1 for factory-tested operation. Table 1. Register Configuration REG NUMBER REGISTER NAME READ/ WRITE REG ADDRESS MSB LSB DATA BYTE D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] 1 N-Divider MSB Write 0x00 FRAC 1 N[14] N[13] N[12] N[11] N[10] N[9] N[8] 2 N-Divider LSB Write 0x01 N[7] N[6] N[5] N[4] N[3] N[2] N[1] N[0] 3 Charge Pump Write 0x02 CPMP[1] 0 CPMP[0] 0 CPLIN[1] 0 CPLIN[0] 1 F[19] F[18] F[17] F[16] 4 F-Divider MSB Write 0x03 F[15] F[14] F[13] F[12] F[11] F[10] F[9] F[8] 5 F-Divider LSB Write 0x04 F[7] F[6] F[5] F[4] F[3] F[2] F[1] F[0] 6 XTAL Buffer and Reference Divider Write 0x05 XD[2] XD[1] XD[0] R[4] R[3] R[2] R[1] R[0] 7 PLL Write 0x06 D24 CPS ICP X X X X X 8 VCO Write 0x07 VCO[4] VCO[3] VCO[2] VCO[1] VCO[0] VAS ADL ADE 9 Lowpass Filter Write 0x08 LPF[7] LPF[6] LPF[5] LPF[4] LPF[3] LPF[2] LPF[1] LPF[0] 10 Control Write 0x09 STBY X PWDN 0 X BBG[3] BBG[2] BBG[1] BBG[0] 11 Shutdown Write 0x0A X PLL 0 DIV 0 VCO 0 BB 0 RFMIX 0 RFVGA 0 FE 0 12 Test Write 0x0B CPTST[2] 0 CPTST[1] 0 CPTST[0] 0 X TURBO 1 LD MUX[2] 0 LD MUX[1] 0 LD MUX[0] 0 13 Status Byte-1 Read 0x0C POR VASA VASE LD X X X X 14 Status Byte-2 Read 0x0D VCOSBR[4] VCOSBR[3] VCOSBR[2] VCOSBR[1] VCOSBR[0] ADC[2] ADC[1] ADC[0] MAX2121B L-Band Tuner with Programmable Baseband Filter www.maximintegrated.com Maxim Integrated │ 10 |
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