AMIS-50050: Spread Spectrum Baseband Controller Data Sheet Wireless Products 1.0 Introduction AMI Semiconductor’s wireless product portfolio includes the AMIS-50050 spread spectrum baseband controller. AMI Semiconductor’s AMIS-5005x products simplify the design of direct sequence spread spectrum radios. They contain all the baseband circuitry needed to implement a radio, thus providing an economical solution to the extensive digital hardware requirements of high performance spread spectrum radios. The AMIS-50050 is a low power device optimal for portable battery powered applications. It utilizes a 3.3V power supply and interfaces to a 3V microprocessor and logic. 2.0 Key Features • • • • • • • • • • • • • • • • • Low power with user controlled ‘shutdown’ modes 3.3V (+/-10 percent) Narrow band and spread spectrum operation, independently selectable for transmit and receive Performs all baseband functions required for implementation of direct sequence spread spectrum and can be used in any radio frequency band User programmable transmission protocol with pass through or packetization formatting Generic microprocessor interface Full or half duplex operation High process gain (up to 2047chips/bit) with data rates from 100bps to 4Mbps Independent transmit and receive PN code generators Gold code and 11 -chip Barker code options Programmable preamble lengths for faster acquisition when there has been recent transmission or reception Byte-wide transmit and receive FIFOs 16 or 32 bit CRC error checking 8 or 16 bit receiver addressing Optional data scrambling Support for: binary phase shift keying (BPSK); differential binary phase shift keying (DBPSK); quadrature phase shift keying (QPSK); differential quadrature phase shift keying (DQPSK) Continuous tracking feature for transferring multiple packets of data at high data rates without reacquiring synchronized packet The AMIS-50050 is a low power device optimal for portable battery powered applications. It utilizes a 3.3V power supply and interfaces to a 3V microprocessor and logic. The AMIS-50050 IC consists of a microprocessor interface and a full duplex transmit/receive message processor circuit. Included in the AMIS-50050 message transmit processor circuits are the data scrambler, packet generator, CRC generator, pseudonoise (PN) code generator, and modulation mode formatter. The AMIS-50050 message processor receive circuits include the receive PN code generator, receive synchronization and tau-dither tracking loop, integrate and dump control, data descrambler, packet decoder, CRC checker, demodulator, and signal strength indicator. Each transmit and receive PN code generator consists of two 11-bit PN generators, allowing selection of an ‘A’ code, a “B” code, or a “Gold code” combination of the “A” and “B” codes. AMI Semiconductor’s AMIS-50050 uses separate transmit and receive 64MHz VCOs, which allow fully independent transmit and receive operations. AMI Semiconductor’s wireless ICs interface to a generic microprocessor bus for programming and data transfer and to an IF modulator/demodulator and RF radio for the transmission medium. 8530 SCC operation and HDLC protocol are emulated for the message packetization and error checking. No packetization can be selected for data to be transmitted as received from the host. The AMIS-50050 is a high performance part, capable of chipping rates up to 64Mchips/second in transmit and receive modes. This results in a maximum data rate of 2Mbps using QPSK or DQPSK modulation and a PN code length of 63. A maximum data rate of 1Mbps is achieved using BPSK or DBPSK modulation and a PN code length of 63. At lower chipping rates the ICs are capable of generating code lengths up to 2047 chips. The lowest possible chipping rate is 300Hz. The flexibility of the design allows an optimal combination of transmitted power, system process gain, system bandwidth and bit rate in order to achieve a reliable communication channel with minimum interference to other adjacent channels or co-channel users. AMI Semiconductor – Sept. 06 www.amis.com 1 AMIS-50050: Spread Spectrum Baseband Controller Wireless Products 3.0 Block Diagram Figure 1: AMIS-50050 Block Diagram AMI Semiconductor – Sept. 06 www.amis.com 2 Data Sheet AMIS-50050: Spread Spectrum Baseband Controller Wireless Products 4.0 Package Availability 68-pin PLCC Figure 2: 68-pin PLCC Package Pin Assignments Table 1: 68-pin PLCC Package 68-pin PLCC Height Body Size Lead Spacing 5.08mm 25 x 25mm 1.27mm AMI Semiconductor – Sept. 06 www.amis.com 3 Data Sheet AMIS-50050: Spread Spectrum Baseband Controller Wireless Products 64-pin PQFP/TQFP Figure 3: 64-pin PQFP/TQFP Package Pin Assignments Table 2: 64-pin PQFP/TQFP Package 64 Lead PQFP Height Body Size Lead Spacing 3.0mm 14 x 14mm 0.80mm Height Body Size Lead Spacing 1.2mm 10 x 10mm 0.50mm 68 Lead TQFP AMI Semiconductor – Sept. 06 www.amis.com 4 Data Sheet AMIS-50050: Spread Spectrum Baseband Controller Data Sheet Wireless Products Table 3: Pin Descriptions Pin Name Type AGND1 Analog GND GND1 Ground VDD1 Vdd Functional Description Crystal oscillator or external reference input, this input is divided by OSCDIV to generate the reference clock for the transmit PLL OSC1 Input OSC2 PLL[3:0] TXD0 TXD1 EPOCH1 PN1 GND2 EXT[3:0] VDD2 EXT[7:4] EXT[9:8] INT RESET CS RD WR GND3 DATA[7:0] ADDR[6:0] VDD3 GND4 DUMP EPOCH2 PN2 Padosc Output Output Output Output Output Ground Output Vdd Output Output Output Input Input Input Input Ground BIDirection Input Vdd Ground Output Output Output RCVRY BIDirection TEST RXD1 RXD0 VREFD AGND2 VCO2 AVDD2 Input Analog I/O Analog In Analog In Analog GND Analog Input Analog VDD DACOUT1 Analog Output DACOUT0 RBIAS VREF AGND3 Analog Output Analog Input Analog Input Analog GND RSSI1 Analog Input Analog input to the ADC – received signal strength indicator from the RF receiver, range is zero to VREF (full scale on the internal ADC) RSSI2 Analog Input Analog input to the ADC – received signal strength indicator from the RF receiver, range is zero to VREF (full scale on the internal ADC) This input is not usable in “SLIP” mode. AVDD3 AVDD1 VCO1 Analog VDD Analog VDD Analog I/O AMI Semiconductor – Sept. 06 www.amis.com Xtal osc output Off-chip PLL programming; Bit0, Enable1, Bit1; Sclk, Bit2, Enable0, Bit3, Sdata Transmit data “I” output Transmit data “Q” output, or QAM output clock Transmit PN generator Epoch signal, (68 pin PLCC package only) Transmit PN generator output, can be internally disabled (PMR Bit 4) External control port (lower bits), user defined functions for radio control External control port (upper bits), user defined functions for radio control External control port (upper bits), user defined functions for radio control (68 pin PLCC package only) Active high – initiates an interrupt to the microprocessor Active low – sets all registers to standby states Active low – selects the chip for reading and writing via the µP interface Active low – initiates a read operation via the µP interface Active low – initiates a write operation via the µP interface µP interface data bus µP interface address bus Integrate and dump control logic output Receive PN Generator Epoch signal (68 pin PLCC package only) Receive PN generator output Clock recovery input for narrow band mode, track-on (active high) output for spread spectrum mode – indicates to external circuitry that the PN code is locked and tracking the received PN code Pin for manufacturing test only – should be tied to ground for normal operation Receive data input “Q” or QAM mode output clock to external shift register Receive data input “I” Reference voltage for integrate and dump comparators and switches Receive VCO control voltage output Receive DAC output during TRACK operation – Note: DACOUT0 and DACOUT1 are provided in the event that separate gain control is necessary for SLIP and TRACK operation Receive PLL DAC output during SLIP operation Current reference for DACs and analog buffers – nominal resistor value of 20kΩ to AGND3 Reference voltage for ADC and DACs – value is mid-scale between VDD and GND Transmit VCO voltage control output 5 AMIS-50050: Spread Spectrum Baseband Controller Data Sheet Wireless Products 5.0 Electrical Specifications 5.1 Absolute Maximum Ratings Table 4: Absolute Maximum Ratings Parameter Min. Max. 6.0 -0.3 VDD/AVDD Input pin voltage, all pins Input pin current, all pins Storage temperature -0.3 -10 Units V VDD+0.3 V 10 mA -55 125 o C o Lead temperature 300 C for 10 seconds Note: Stresses beyond those listed under “Absolute Maximum Ratings” may cause damage to the device. This is a stress rating only and functional operation of the device at these, or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 5.2 Operational Range Table 5: Operational Range Symbol Parameter VDD/AVDD Ta Supply voltage Operating temperature Min. Typ. Max. 3 -40 3.3 3.6 85 Units V C o 5.3 DC Electrical Operating Characteristics Table 6: DC Characteristics Symbol Parameter Conditions Min. Vil Vih Vol Input low voltage Input high voltage Output low voltage Iol = 2mA Voh Output high voltage Ioh = -1mA Iil Input leakage Vi = 0V to VDD/AVDD Ioz Output leakage I/O = Hi impedance Vo = 0V to VDD/AVDD OSCI Vil* Input low voltage OSCI Vih* Input high voltage www.amis.com Units 0.4 V V V +/-10 µA +/-10 µA 0.7VDD 2.4 300 V 0.1LVDD 0.9VDD Note: * These levels are needed on the OSCI input if it is being driven by an external clock. AMI Semiconductor – Sept. 06 Max. 0.25VDD 6 V V AMIS-50050: Spread Spectrum Baseband Controller Data Sheet Wireless Products 5.4 AC Characteristics Table 7: AC Characteristics Symbol Parameter Min. Typ. DAC LSB DAC Zero (1) DAC FS DAC current source, least significant bit DAC current with 0 input DAC current source, with HEX F input DAC DIFF LIN DAC differential non-linearity +/-0.1 ADC STEP (2) Max. Units 100 +/-200 µA nA µA 10.3 +/-100 +/-155 LSB ADC first step 130 mV ADC least significant bit 103 mV ADC FS ADC full scale 1.56 V ADC DIFF LIN ACD differential non-linearity +/-0.3 LSB ADC LSB VCO GAIN VCO gain 45 MHz/V RXDRES RXD0/1 resistance 74 Ω VCO GAIN Comparator input low voltage RXDRES Comparator input high voltage 1.5 1.8 V V Note: Specified typical values are from characterization at 25oC, 3.3V AVDD, VDD. FS means full scale. (1) Source and sink (2) ADC STEP1 includes offset. Successive steps defined by ADC/LSB value. 5.5 IDD Characteristics Table 8: IDD Characteristics Symbol Conditions Max. Units ISLEEP ITXS IRXS Sleep mode TX standby RX standby 50 21 38 µA mA mA IALL Full duplex 70 mA IPIN Full duplex with PN1 disabled 68 mA ITXON1 TX on, RX VCO off 41 mA ITXON2 TX on, RX VCO on 58 mA IRXON RX on 58 mA Notes: All IDD tests are done at AVDD = VDD = 3.6V, 1Mbps BPSK, 64MHz chipping, internal transmit PN code mixing A and B Gold codes, 50pF load using indicated condition. AMI Semiconductor – Sept. 06 www.amis.com 7 AMIS-50050: Spread Spectrum Baseband Controller Data Wireless Products 6.0 Microcontroller Interface Read/Write Timing 6.1 Read Timing Characteristics Table 9: Read Timing Characteristics Symbol Parameter Min. Max. Units 60 60 25 nS nS nS Tcsd Trd Tcsdz Read chip select low to valid data out Read low to valid data out Chip select high to data bus disable Trdz Read high to data bus disable Tcsur Read chip select setup 0 nS Tchr Read chip select hold 10 nS Tadrsur Read address setup 10 nS 25 nS Note: See Figure 4: Read Timing Diagram 6.2 Write Timing Characteristics Table 10: Write Timing Characteristics Symbol Parameter Max. Units Tcsuw Write chip select setup 0 nS Tchw Tadrsuw Write chip select hold Write address setup 10 10 nS nS Tadrh Write address hold 10 nS Tdsu Write data setup time 15 nS Tdh Write data hold 10 nS Note: See Figure 5: Write Timing Diagram Figure 4: Microcontroller Read Timing AMI Semiconductor – Sept. 06 www.amis.com 8 Sheet AMIS-50050: Spread Spectrum Baseband Controller Wireless Products Figure 5: Microcontroller Write Timing Figure 6: Input Test Waveforms and Measurement Levels Figure 7: Output Test Load AMI Semiconductor – Sept. 06 www.amis.com 9 Data Sheet AMIS-50050: Spread Spectrum Baseband Controller Data Sheet Wireless Products 7.0 AMIS-50050 Ordering Codes Table 11: Ordering Codes Device Number Package 08906-002-XTP (or –XTD) 68 Lead PLCC 08906-003-XTP (or –XTD) 64 Lead PQFP 08906-004-XTP (or –XTD) 64 Lead TQFP 64 Lead TQFP (green/RoHS) 08906-808-XTP (or –XTD) XTP – Tape & Reel XTD – Tube/Tray 8.0 Company or Product Inquiries For more information about AMI Semiconductor, our technology and our product, visit our Web site at: http://www.amis.com North America Tel: +1.208.233.4690 Fax: +1.208.234.6795 Europe Tel: +32 (0) 55.33.22.11 Fax: +32 (0) 55.31.81.12 Devices sold by AMIS are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMIS makes no warranty, express, statutory, implied or by description, regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. AMIS makes no warranty of merchantability or fitness for any purposes. AMIS reserves the right to discontinue production and change specifications and prices at any time and without notice. AMI Semiconductor's products are intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing by AMIS for such applications. Copyright ©2006 AMI Semiconductor, Inc. AMI Semiconductor – Sept. 06 www.amis.com 10