LMX3160 Single Chip Radio Transceiver

Programmable ModesSeveral modes of operation can be programmed with the function register bits F1–F18 including the phase detector polaritycharge pump TRI-STATE and CMOS outputs In addition software or hardwire power down modes may be selected with bitsF14 and F15 The programmable modes are latched in when the control bits are C1 e 1 C2 e X Truth tables for theprogrammable modes are shown in Tables I–IIITABLE I Programmable ModesF1F2F3F4F5F6F7F8F9F10F11F12F13F14F15F16F17F18Prescaler Mod Select (3264)Phase Detector PolarityCharge Pump CurrentCharge Pump TRI-STATEDon’t CareReceive Section Power DownTransmit Section Power DownOut 0 CMOS OutputFastLock OutputOut 1 CMOS OutputReceive Section Power Down InputOut 2 CMOS OutputTransmit Section Power Down InputDon’t CareFastLock Automan selectOut 0 Normal CMOSFastLock SwitchMode Select See Mode Select TableMode Select See Mode Select TableAuto FastLock Counter Bit 16Auto FastLock Counter Bit 32Auto FastLock Counter Bit 64Functional DescriptionF1F2F3F4F5F6–F7F8–F10F11F12F13F14–F15F16–F18Pre-scaler modules select LOW selects 3233 and HIGH selects 6465Phase Detector Polarity F2 is used to reverse the polarity of the phase detector Depending upon V CO characteristicsF2 should be set accordinglyWhen VCO characteristics are positive F2 should be set HIGHWhen VCO characteristics are negative F2 should be set LOWCharge pump current LOW selects low charge pump current (1X I cpo ) High selects HIGH charge pump current(4X I cpo )Charge Pump TRI-STATEDon’t CarePower down When F14 e 0 and F15 e 0 F6 controls the state of the receive section and F7 controls the state of thetransmit section A LOW powers up the section while a HIGH powers down the sectionCMOS Outputs When F13 is LOW F8 controls sets state of Out 0 (pin 21) When in normal power down mode (F14 e0 F15 e 0) F9 and F10 sets the state of Out 1 (pin 22) and Out 2 (pin 23) respectivelyDon’t CareFastLock AutoManual Mode Select When F13 HIGH selects auto or manual FastLock modeOut 0 (pin 21) NormalFastLock select When LOW the state of Out 0 (pin 21) is controlled by F8 When HIGH Out 0 isused for FastLockPower Down Mode Control See Table IIIFastLock Timeout Counter See Table IV for counter values11