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GP1020 Dataheets PDF



Part Number GP1020
Manufacturers Zarlink Semiconductor Inc
Logo Zarlink Semiconductor Inc
Description SIX-CHANNEL PARALLEL CORRELATOR CIRCUIT FOR GPS OR GLONASS RECEIVERS
Datasheet GP1020 DatasheetGP1020 Datasheet (PDF)

FEBRUARY 1994 DS3605-2.2 GP1020 SIX-CHANNEL PARALLEL CORRELATOR CIRCUIT FOR GPS OR GLONASS RECEIVERS The GP1020 is a six-channel CMOS digital correlator which has been designed to work with the GP1010 L1-channel downconverter or other integrated circuits, and may be used to acquire and track the GPS C/A code or the GLONASS signals. For each of the six channels the GP1020 includes independent digital down-conversion to baseband, C/A code generation, correlation, and accumulate-and-dump register.

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FEBRUARY 1994 DS3605-2.2 GP1020 SIX-CHANNEL PARALLEL CORRELATOR CIRCUIT FOR GPS OR GLONASS RECEIVERS The GP1020 is a six-channel CMOS digital correlator which has been designed to work with the GP1010 L1-channel downconverter or other integrated circuits, and may be used to acquire and track the GPS C/A code or the GLONASS signals. For each of the six channels the GP1020 includes independent digital down-conversion to baseband, C/A code generation, correlation, and accumulate-and-dump registers. The GP1020 interfaces with a microprocessor via a 16-bit data bus to control the acquisition and tracking processes using the various registers on the chip. 90 61 91 60 FEATURES GP1020 s Six Fully Independent Correlation Channels s Switchable to Receive GPS or GLONASS Codes s Input Multiplexer for Multiple GPS Front-Ends – Allows Antenna Diversity 120 31 s Input Multiplexer for GLONASS Multiple (Separate Channels) Front-Ends s Digital Interface Compatible with Most 16 or 32-Bit Microprocessors 1 30 GP120 Fig 1 Pin connections - top view s Fully Compatible with GP1010 GPS Receiver Front-End s Sideways Stackable to give Multiples of Six Channels s 120-pin Plastic Quad Flatpack s Power Dissipation Less Than 500mW APPLICATIONS ABSOLUTE MAXIMUM RATINGS These are not the operating conditions, but are the absolute limits which if exceeded, even momentarily, may cause permanent damage. To ensure sustained correct operation the device should be used within the limits given under Electrical Characteristics. Supply voltage (VDD) from ground (VSS): 20·3V to16·0 V Input voltage (any input pin): VSS20·3V to VDD10·3 V Output voltage (any output pin): VSS20·3V to VDD10·3 V Storage temperature: 255°C to 1125°C s GPS or GLONASS Navigation Systems s High Integrity Combined Receivers s GPS Geodetic Receivers s GPS Time Reference ORDERING INFORMATION The GP1020 is available in 120-pin Quad Flatpacks (Gullwing formed leads) in both Commercial (0 °C to 170°C) and Industrial (240°C to 185°C) grades. The ordering codes below are for standard screened devices. RELATED PRODUCTS Part Description Datasheet Reference DS3861 DS3076 ORDERING CODES GP1020 CG GPKR Commercial - Plastic 120-pin QFP (GP120) GP1020 IG GPKR Industrial - Plastic 120-pin QFP (GP120) DW9255 35·42MHz SAW Filter GP1010 GPS Receiver Front-End GP1020 TYPICAL GPS RECEIVER (Fig. 2) All satellites use the same L1 frequency of 1575·42MHz, but different Gold codes, so a single front-end may be used. To achieve better sky coverage it may be desirable to use more than one antenna, in which case separate front-ends will be needed. GND MASTER CLK SAMPLE CLK SIGN MAG VSS 15V VDD MASTERRESET NAVIGATION SOLUTION GP1010 & FILTER MASTER/SLAVE CS DECODE DATA BUS (16) ADDR BUS (8) CONTROL SIGN 0 MAG 0 SIGN 1 MAG 1 GP1020 (MASTER) TIC OUT INT OUT MICROPROCESSOR SYSTEM 3 MULTIPLE ANTENNAS TO GIVE WIDER SKY COVERAGE SLAVECLK TIC IN SIGN 0 MAG 0 SIGN 1 MAG 1 INT IN OPTIONAL SECOND GP1010 & FILTER CS DECODE OPTIONAL SECOND GP1020 (SLAVE) VSS VDD MASTER/SLAVE 15V GND MASTERRESET Fig. 2 GPS receiver simplified block diagram TYPICAL GLONASS RECEIVER (Fig. 3) Each satellite will use a different ‘L1’ carrier frequency, in the range 1602·5625 to 1615·500MHz, with 0·5625MHz spacing, but all with the same 511-bit spreading code. The normal method for receiving these signals is to use several front-ends, perhaps with the first LNA and mixer common, but certainly with different final local oscillators and mixers. GLONASS FRONT-END FILTERS, AMPLIFIERS AND MIXERS CHANNEL SELECTION AND ADC CHANNEL SELECTION AND ADC CHANNEL SELECTION AND ADC CHANNEL SELECTION AND ADC CHANNEL SELECTION AND ADC FREQUENCY GENERATOR CHANNEL SELECTION AND ADC SAMPLE CLK SIGN MAG SIGN MAG SIGN MAG SIGN MAG SIGN MAG SIGN MAG GND VSS 15V VDD MASTER/SLAVE L-BAND DOWN CONVERTER SAMP CLK SIGN 0 MAG 0 SIGN 1 MAG 1 SIGN 2 MAG 2 SIGN 3 MAG 3 SIGN 4 MAG 4 SIGN 5 MAG 5 NAVIGATION SOLUTION MASTERRESET CS DECODE MICROPROCESSOR SYSTEM DATA BUS (16) GP1020 ADDR BUS (8) CONTROL 3 INT OUT MASTER CLOCK OSCILLATOR FREQUENCY SELECTION Fig. 3 GLONASS receiver simplified block diagram 2 GP1020 PIN DESCRIPTIONS (See Application Notes, p. 41) All VSS and all VDD pins must be used in order to ensure reliable operation. Several pins, such as Satellite Inputs 2 to 9 Sign and Magnitudes are also used for device testing, but only as a secondary function. Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Pin No. 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Signal name TICIN TICOUT D0 D1 VSS VDD D2 D3 TIME MARK RTCINT MARKFB1 MARKFB2 D4 D5 VDD VSS D6 D7 WPROG NANDA NANDB TDO TCK TRST NANDOP TMS TDI MARKFB3 TDO7 DISCOP TDO6.


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