Texas Instruments TCM4300 manual Introduction, Features

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1 Introduction

Texas Instruments (TI) TCM4300 IS-54B advanced RF cellular telephone interface circuit (ARCTIC) provides a baseband interface between the digital signal processor (DSP), the microcontroller, and the RF modulator/demodulator in a dual-mode IS-54B cellular telephone. See the TCM4300 functional block diagram.

In the analog mode, the TCM4300 provides all required baseband filtering as well as transmit D/A conversion and receive A/D conversion using dual 10-bit sigma-delta converters. In addition, a WBD wide-band data (WBD) ±10 kb/s Manchester frequency shift key (FSK) demodulator is provided to allow reduced DSP processing load during subscriber standby mode.

In the digital mode, the TCM4300 accepts I and Q baseband data and performs A/D and D/A conversion and square-root raised-cosine filtering using dual 10-bit sigma-delta converters. The TCM4300 also has a π/4-DQPSK modulation encoder for dibit-to-symbol conversion in the digital transmit mode.

The microcontroller interface is compatible with a wide range of microcontrollers. A microcontroller can be used to communicate with the user interface (keyboard, display, etc.) and to program up to three frequency synthesizers by using the on-chip synthesizer interface circuit.

The TCM4300 provides advanced power control to minimize the power consumption of many dual-mode telephone functional blocks such as the speech codec, FM receiver, I and Q demodulator, transmitter signal processor, and RF power amplifier. In addition, the TCM4300 is designed to reduce system power consumption through low-voltage operation and standby mode.

The TCM4300 is offered in the 100-pin PZ package and is characterized for free-air operation from ±40°C to 85°C.

1.1Features

•Compliance With TIA IS-54B Dual-Mode Cellular Standard

•Baseband Transmit Digital-to-Analog (D/A) Conversion and Receive Analog-to-Digital (A/D) Conversion in Analog Transmit Mode Using Dual 10-Bit Sigma-Delta Converters

•Square Root Raised Cosine (SQRC) Filtering in the Digital Mode Using Dual 10-Bit Sigma-Delta Converters

•π/4-Differential Quadrature Phase-Shift Key (DQPSK) Modulation Encoder in Digital Transmit Mode

•Power Control Supervision for Radio Frequency (RF) Power Amplifier, Automatic Frequency Control (AFC), Automatic Gain Control (AGC), and Synthesizer

•Received Signal Strength Indicator (RSSI) and Battery-Level A/D Conversion Circuitry

•Internal Clock Generation

•Wide-Band Data Clock Recovery and Manchester Decoding

•General-Purpose Digital Signal Processor (DSP) and Microcontroller Interface

•3.3-V and 5-V Operation

•Low Power Consumption

TI and ARCTIC are trademarks of Texas Instruments Incorporated.

1±1

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Contents Data Manual SLWS010F TCM4300 Data Manual Important Notice Contents Mechanical Data ±1 List of Illustrations List of Tables Introduction FeaturesTCM4300 Functional Block Diagram PZ Package TOP View Pin AssignmentsVSS FmrxenTerminal Description Name Terminal FunctionsDspstrbl DsprwDvdd DvssMTS1 McdsMclkin McrwSint ScenSynclk SyndtaDissipation Rating Table Power Rating Above TA = 25CPackage Derating FactorPower Consumption Reference CharacteristicsRecommended Operating Conditions RXIP, RXIN, RXQP, and Rxqn Inputs Avdd = 3 V, 4.5 V, 5 Terminal ImpedanceFunction MIN TYP² MAX Unit Parameter Test Conditions MIN TYP MAX UnitTransmit I and Q Channel Outputs Auxiliary D/A ConvertersParameter MIN TYP MAX Unit Auxiliary D/A Converters Slope AGC, AFC, Pwrcont RSSI/Battery A/D ConverterAuxiliary D/A Converters Slope Lcdcontr Nominal LSB Nominal Output VoltageTransmit TX Channel Frequency Response Digital Mode Transmit TX Channel Frequency Response Analog Mode Page Mclkout Timing Requirements see ±1 and Note MclkoutVOH VOL Mcds Parameter Alternate MIN MAX UnitMcrw MCA4±MCA0 MCD7±MCD0 Mccsh MccslMCA4±MCA0 Parameter Alternate MIN MAX Unit SymbolMCA4±MCA0 MCD7±MCD0 Twdho MCA0±MCA4 MCD0±MCD7 Mccsh Mccsl Motorola 16-Bit Read Cycle, MTS 10 =MCA0±MCA4 MCD0±MCD7 Mccsh Mccsl Mcrw MCA0±MCA410% ThR / W ThWA Dspstrbl DspcslDsprw Dspa Dspd±11. TCM4300 to DSP Interface Write Cycle ±12 Control Signal Analog Mode Digital Mode ±1. TCM4300 Receive Channel Control SignalsMode Fmvox Iqrxen Fmrxen Data Transfer±2. RXIP, RXIN, RXQP, and Rxqn Inputs Avdd = 3 V, 4.5 V, 5 Transmit Section ±5. Transmit TX I and Q Channel Outputs Modulation error percentage +100 s %Transmit Burst Operation Digital Mode ±6. Transmit TX Channel Frequency Response Digital Mode±7. Transmit TX Channel Frequency Response Analog Mode ±1. Power Ramp-Up/Ramp-Down TIming Diagram Wide-Band Data Demodulator Transmit I And Q Output LevelWide-band Data Interrupts ±8. Typical Bit-Error-Rate Performance Wbdbw =±9. Bits in Control Register WBDCtrl Parameter Test Conditions MIN MAX Unit Mean CNRWBD Wide-band Data Demodulator General InformationAuxiliary DACs, LCD Contrast Converter ±10. Auxiliary D/A Converters±11. Auxiliary D /A Converters Slope AGC, AFC, Pwrcont ±13. RSSI/Battery A/D Converter RSSI, Battery MonitorTiming And Clock Generation ±12. Auxiliary D /A Converters Slope LcdcontrSpeech-Codec Clock Generation Clock GenerationMicrocontroller Clock Sample Interrupt SintPhase-Adjustment Strategy RCO MclkinMclken Frequency Synthesizer Interface Highval Clkpol Numclks LowvalMSB/LSB First SyndtaName Description ±14. Synthesizer Control Fields15. External Power Control Signals Power Control PortName Suggested External Application Reset Synclk Syndta SYNLE1 SYNLE0 SynrdyWBD Wbdon Iqrxen Txen ModeOUT1 Fmrxen ScenDint Microcontroller-DSP CommunicationsFifo a Fifo B Cint DSP±16. Microcontroller Register Map Microcontroller Register MapWide-Band Data/Control Register ±17. Microcontroller Register DefinitionsAddr Name Category BIT Name Function Reset Value Microcontroller Status and Control Registers±18. WBDCtrl Register ±19. MStatCtrl Register Bits LCD ContrastLDC D/A LcdenDSP Register Map ±20. DSP Register Map±21. DSP Register Definitions Base Station Offset Register Wide-Band Data RegistersDspcsl TCM4300 Dsprw Dspstrbl Sint Cint Bdint DSP Strb INT±22. DStatCtrl Register Bits DSP Status and Control RegistersPower-On Reset ResetInternal Reset State ±23. Power-On Reset Register Initialization±24. Microcontroller Interface Configuration Intel Microcontroller Mode Of Operation±25. Microcontroller Interface Connections for Intel Mode Microcontroller InterfaceMotorola Microcontroller Mode of Operation Mitsubishi Microcontroller Mode of OperationMcrw Mcds IRQ NMI DintCS3 ±32 PZ S-PQFP-G100 Mechanical DataImportant Notice
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