Texas Instruments TRF3722 EVM, Manual

Page: 45 / 69

45
TRF3722
www.ti.com SLWS245B – MAY 2014 – REVISED FEBRUARY 2017
Product Folder Links: TRF3722
Submit Documentation Feedback
Copyright © 2014–2017, Texas Instruments Incorporated
Table 8. Register 2
Register 2 Bit Name Reset Value Description
Bit0 ADDR<0> 0
Register Address Bits
Bit1 ADDR<1> 1
Bit2 ADDR<2> 0
Bit3 ADDR<3> 1
Bit4 ADDR<4> 0
Bit5 NINT<0> 0
PLL N-Divider Value
Bit6 NINT<1> 0
Bit7 NINT<2> 0
Bit8 NINT<3> 0
Bit9 NINT<4> 0
Bit10 NINT<5> 0
Bit11 NINT<6> 0
Bit12 NINT<7> 1
Bit13 NINT<8> 0
Bit14 NINT<9> 0
Bit15 NINT<10> 0
Bit16 NINT<11> 0
Bit17 NINT<12> 0
Bit18 NINT<13> 0
Bit19 NINT<14> 0
Bit20 NINT<15> 0
Bit21 PLL_DIV_SEL<0> 1
Select division ratio of divider in front of prescaler
[00] = 1X, [01] = div2, [10] = div4
Bit22 PLL_DIV_SEL<1> 0
Bit23 PRSC_SEL 1 Select precaler modulus: [0] = 4/5, [1] =8/9
Bit24 RSV 0
Reserved
Bit25 RSV 0
Bit26 VCO_SEL<0> 0
Selects between the four integrated VCOs
[00] = lowest frequency, [11] = highest frequency
Bit27 VCO_SEL<1> 1
Bit28 VCO_SEL_MODE 0 Single VCO auto-calibration mode: [1] = active
Bit29 CAL_ACC<0> 0
Error count during the cap array calibration
[00] = 0, [01] = 1/32, [10] = 1/64, [11] =1/128)
Bit30 CAL_ACC<1> 0
Bit31 EN_CAL 0 Initiate VCO auto-calibration, resets automatically