RoyalTek RET-3570LP, User Manual

Page 1: ...he sole purpose of the business discussions between customer and RoyalTek and is covered under the terms of the applicable Non Disclosure Agreements Disclosure of this information to other parties is prohibited without the written consent of RoyalTek Prepared by RoyalTek Company LTD 8F 256 Yang Guang Street Neihu Chiu Taipei Taiwan TEL 886 2 77215000 FAX 886 2 77215666 http www royaltek com contac...

Page 2: ...CE BOARD 2 1 4 SYSTEM BLOCK DIAGRAM 4 1 5 TECHNICAL SPECIFICATION 5 1 6 APPLICATION CIRCUIT 6 1 7 RECOMMENDED LAYOUT PAD 8 1 8 MECHANICAL LAYOUT 9 1 9 TEST SOFTWARE SPECIFICATION 9 1 10 HARDWARE INTERFACE 10 2 SOFTWARE INTERFACE 14 3 GPS RECEIVER USER S TIP 18 4 PACKAGE SPECIFICATION AND ORDER INFORMATION 19 5 CONTACT ROYALTEK 19 6 REVISION HISTORY 19 ...

Page 3: ...on data The smallest form factor and miniature design is the best choice to be embedded in a device such as portable navigation device personal locator and speed camera detector and vehicle locator 1 1 Product Features 20 parallel channels TMC embedded TMC frequency 87 5MHz 108MHz SMT type with stamp holes TCXO design 0 1 second reacquisition time Small form factor with embedded SiRF Star III sing...

Page 4: ...aracteristics 1 N C 2 N C 3 Battery I Backup voltage supply 10uA Current 3 6V 2 5 DC 4 VCC I DC Supply Voltage input DC 3 3V 10 5 Reset I Reset Active low 8 0 2 3V VIH V VIL 6 10 N C 11 TXA O Serial port A V V V V V OL OH 715 0 85 2 375 2 CMOS TTL level 12 RXA I Serial port A V V V V V IL IH 855 0 0 3V 15 3 995 1 CMOS TTL Level 13 N C 14 TXB O Serial port B V V V V V OL OH 715 0 85 2 375 2 CMOS TT...

Page 5: ...r RET 3570 Switch 0 Low 1 High CMOS TTL Level N C for RET 3570 4 PPS PPS output Switch 0 Low 1 PPS output 5 GPS_3V3 Power supply for GPS section Switch 0 Low 1 DC 3 3V output 6 TMC_3V3 Power supply for TMC section Switch 0 Low 1 DC 3 3V output 7 N C 8 RF_Bias RF_Bias voltage switch 0 open No voltage provide antenna 1 Provide 2 85V to antenna Connector Pin Description Characteristics J1 GPS RF Conn...

Page 6: ...RoyalTek Confidential 4 RET 3570LP User Manual 1 4 System Block Diagram System block diagram description 1 External antenna 2 4 Mega bits flash memory 3 31 pin I O pin ...

Page 7: ...ycle 34 Variable 14 Update rate Continuous operation 1Hz 15 Testability It shall be able to be tested by SiRF test IV and single channel simulator 16 Protocol setup It shall store the protocol setup in the SRAM memory 17 DGPS WAAS EGNOS Interface 18 LNA No LNA 19 I O Pin 31pin TMC RDS receiver 20 Frequency 87 5 108MHz US Europe 21 RDS sensitivity 24 7uV typical Δf 22 5kHz fAF 1kHz L R fRDS 1 2kHz ...

Page 8: ...ll up 10KΩ if use the DGPS output If the DGPS output is not used it won t connect anything III The RXB pin is recommended to connect to serial resistance 220Ω if the DGPS output is used If the DGPS output is not used it won t connect anything 3 Backup Battery It s recommended to connect a backup battery to V_RTC_3V3 in order to enable the warm start and hot start features of the GPS receiver If yo...

Page 9: ...c_RF_OUT pin pin 20 provides voltage 2 85V If you use an active antenna you can connect this pin to V_ANT_IN pin pin 19 for providing bias voltage of an active antenna The bias voltage will run through GPS_RF_IN pin to provide active antenna bias voltage from Vcc_RF_OUT pin If your bias voltage of an active antenna isn t 2 85V you can input bias voltage that you need to V_ANT_IN pin pin 19 The inp...

Page 10: ...RoyalTek Confidential 8 RET 3570LP User Manual 1 7 Recommended layout PAD Top View ...

Page 11: ...Test Software Specification No Function Specification 1 Clock offset 88000Hz Measurement 104000Hz 2 Clock Drift Measurement 200Hz 3 C No Hi Power Mean Measurement 38dB 4 C No Hi Power Sigma Measurement 2dB 5 Bit Sync Measurement 5 Sec 6 Frame Sync Measurement 28 Sec 7 Phase Error Measurement 0 22 ...

Page 12: ... V V V OL OH 715 0 85 2 375 2 6 TXB O Serial port B V V V V V OL OH 715 0 85 2 375 2 7 RXB I Serial port B V V V V IL IH 855 0 0 3V 15 3 995 1 8 N C 9 RF_ON O Indicates power state of RF part V V V V OL OH 0 85 2 10 GND G Ground Reference Ground 11 AUDIO_R O Audio right channel output AFL V Output voltage 66mV typical 75mV max AFL R Output resistance 50Ω min 100Ω 12 AUDIO_L O Audio Left channel ou...

Page 13: ...15 3 995 1 V V V V V OL OH 715 0 85 2 375 2 26 GPIO0 I O General purpose I O V V V V V V IL IH 855 0 0 3 15 3 995 1 V V V V V OL OH 715 0 85 2 375 2 27 N C 28 N C 29 PPS O One pulse per second V V V V V OL OH 715 0 85 2 375 2 30 GND G Ground Reference Ground 31 V_TMC_3V3 I DC Supply Voltage input DC 3 3V 5 V_GPS_3V3 3 3V DC power Input This is the DC power supply input pin for GPS system It provid...

Page 14: ... between the antenna or antenna connector has to be a controlled impedance line Micro strip at 50Ω V_ANT_IN This pin is reserved as external DC power supply input for an active antenna If using 2 85V active antenna the pin 20 has to be connected to pin 19 If using 3 3V or 5V active antenna this pin has to be connected to 3 3V or 5V power supply PS The current must be 100mA and voltage 12V if exter...

Page 15: ...RoyalTek Confidential 13 RET 3570LP User Manual The supply voltage should be between 2 5V and 3 6V GPIO Functions Several I Os are connected to the digital interface connector for customer applications ...

Page 16: ...A Global Positioning System Fixed Data Table 2 contains the values of the following example GPGGA 161229 487 3723 2475 N 12158 3416 W 1 07 1 0 9 0 M 0000 18 Table 2 GGA Data Format Name Example Units Description Message ID GPGGA GGA protocol header UTC Position 161229 487 hhmmss sss Latitude 3723 2475 ddmm mmmm N S Indicator N N north or S south Longitude 12158 3416 Dddmm mmmm E W Indicator W E ea...

Page 17: ...mple GPGSA A 3 07 02 26 27 09 04 15 1 8 1 0 1 5 33 Table 4 GSA Data Format Name Example Units Description Message ID GPGSA GSA protocol header Mode 1 A See Table 4 2 Mode 2 3 See Table 4 1 Satellite Used 07 Sv on Channel 1 Satellite Used 02 Sv on Channel 2 Satellite Used Sv on Channel 12 PDOP 1 8 Position Dilution of Precision HDOP 1 0 Horizontal Dilution of Precision VDOP 1 5 Vertical Dilution of...

Page 18: ...rees Channel 1 Maximum 90 Azimuth 048 degrees Channel 1 True Range 0 to 359 SNR C No 42 dBHz Range 0 to 99 null when not tracking Satellite ID 27 Channel 4 Range 1 to 32 Elevation 27 degrees Channel 4 Maximum 90 Azimuth 138 degrees Channel 4 True Range 0 to 359 SNR C No 42 dBHz Range 0 to 99 null when not tracking Checksum 71 CR LF End of message termination 1 Depending on the number of satellites...

Page 19: ...m N S Indicator N N north or S south Longitude 12158 3416 dddmm mmmm E W Indicator W E east or W west Speed Over Ground 0 13 knots Course Over Ground 309 62 degrees True Date 120598 ddmmyy Magnetic Variation degrees E east or W west Mode A A Autonomous D DGPS E DR Checksum 10 ...

Page 20: ...as umbrella or in vehicle iii Among high buildings iv Under bridges or tunnels v Under high voltage cables or near by radio wave sources such as mobile phone base stations vi Bad or heavy cloudy weather D If the satellite signals can not be locked or encounter receiving problem while in the urban area the following steps are suggested i Please plug the external active antenna into GPS receiver and...

Page 21: ... Tel 886 2 77215000 Fax 886 277215666 Web Site http www royaltek com Web Site Customer Service http www royaltek com contact 6 Revision History Title RET 3570LP Doc Type User Manual Revision Number Date Author Change notice 0 1 20076 03 26 May Chen Initial Release 0 2 2007 03 28 May Chen Remove RTCM Protocol 1 0 2007 03 29 May Chen Final Release 1 1 2007 07 09 May Chen Modify the chipset TTFF open...