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CC400-RTR2 数据表(PDF) 24 Page - Texas Instruments |
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CC400-RTR2 数据表(HTML) 24 Page - Texas Instruments |
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24 / 31 page ![]() CC400 SWRS050 Page 24 of 32 Register B REGISTER NAME Default value Active Description B[12:11] AB[1:0] 00 Antibacklash pulse width 00 = 0ns (nominal setting) 01 = 2.7ns 10 = 4.8ns 11 = 10.9ns Tolerance (+200% / - 70%) B[10:7] A[3:0] - A-counter B[6:0] M[6:0] - M-counter Register C REGISTER NAME Default value Active Description C[12] RESSYN 0 Synthesiser reset 0 = Normal operation 1 = Reset synthesiser C[11:9] V[3:1] - VCO gain programmering. LSB-bit VO = “0”. 000= maximum gain 111=minimum gain Reduce gain to reduce LO spurious emission C[8] PA[4] - PA gain programmering. Part of PA4:PA0 C[7] FSIG - Charge pump polarity 0 = Add charge when VREF leads FVCO (Normal) 1 = Sink charge when VREF leads FVCO C[6:5] CHP[1:0] 10 Charge pump current: 00 = 10 µA 01 = 20 µA 10 = 40 µA (nominal setting) 11 = 80 µA C[4] PDX - H Reference oscillator power down 0 = Power on even during main power down 1 = Power down (during main power down) C[3:0] R[3:0] - R-divider Register D REGISTER NAME Default value Active Description D[12:11] PA[1:0] - PA gain programming. Part PA4 D[10:0] K10:0] - K-counter K10 er sign bit (0=positive, 1 negative). Negative K must be 2’s complement Register E REGISTER NAME Default value Active Description E[12] LW 0 PLL Lock-Window tolerance 0 = 21ns (Normal setting) 1 = 44ns E[11] LM - Lock mode (Lock is reset when PLL is reprogrammed). 0 = Single shot 1 = Continuous E[10] LH - Lock detection enable 0 = Lock detection enabled 1 = Lock detection disabled (LOCK=1) |
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