GPS Receiver A2035-H A Description of Maestro’s GPS Antenna Receiver Module A2035-H User’s Manual Version 1.
Revision History Rev. 0.1 0.2 1.0 1.1 1.2 Date 07-05-11 09-15-11 11-11-11 03-01-12 05-24-12 1.3 1.4 07-25-12 04-01-13 Description First release Updated Table 5: A2035-H electrical characteristics Updated photo Add Firmware Updates information link to 1PPS application note and 1PPS timing accuracy remarks added Add 5Hz Navigation Update Rate Update I2C interface description Add self-start description mm-dd-yy Name Written by Checked by Approval by V1.
Disclaimer THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF MAESTRO WIRELESS SOLUTIONS LIMITED. IT MAY NOT BE COPIED OR TRANSMITTED BY ANY MEANS, PASSED TO OTHERS, OR STORED IN ANY RETRIEVAL SYSTEM OR MEDIA, WITHOUT PRIOR CONSENT OF MAESTRO OR ITS AUTHORIZED AGENTS. THE INFORMATION IN THIS DOCUMENT IS, TO THE BEST OF OUR KNOWLEDGE, ENTIRELY CORRECT.
Table of Contents 1 Introduction ........................................................................................................ 6 1.1 Feature Overview .............................................................................................. 6 1.2 Characteristics Overview................................................................................... 6 1.3 RoHS and Lead-Free Information ..................................................................... 7 1.4 Label .......................
9 Applications and Hints .................................................................................... 28 9.1 Initial Module Start .......................................................................................... 28 9.2 Proper Shutdown and Power-On-Reset (POR) ............................................... 28 9.3 SiRFawareTM Support ..................................................................................... 28 9.4 Push-to-Fix Mode ..................................................
1 Introduction Maestro’s GPS antenna receiver module A2035-H is a highly integrated GPS antenna receiver module based on the technology of the GPS receiver module A2100-A and a ceramic GPS patch antenna. The module is capable of receiving signals from up to 48 GPS satellites and transferring them into position and timing information that can be read over a serial port. Small size and high-end GPS functionality are combined at low power consumption.
1.3 RoHS and Lead-Free Information Maestro’s products marked with the lead-free symbol either on the module or the packaging comply with the "Directive 2002/95/EC of the European Parliament and the Council on the Restriction of Use of certain Hazardous Substances in Electrical and Electronic Equipment" (RoHS). All Maestro GPS receiver modules, GPS antenna receiver module and telematics units are RoHS compliant. V1.
1.4 Label The A2035-H label (size: 9.5 x 9.5 mm²) contains the following information: Figure 1: A2035-H label The label is placed on the shield of the module. The data matrix code holds the product type, software version, software release, hardware release, factory code, year & week of assembly and a 6-digit serial number.
1.5 Characteristics The module is characterized by the following parameters. 1.5.1 GPS Characteristics Channels Correlators Frequency Tracking Sensitivity On-module antenna Horizontal Position Accuracy Time To First Fix – TTFF (theoretical minimum values; values in real world may differ) 48, parallel tracking ～400,000 L1 (= 1,575 MHz) Stand alone Obscuration recovery (1) Hot start (2) Warm (3) Cold (4) -163 dBm < 2.5 m CEP (SA off) 0.
2 Ordering Information 2.1 GPS Receiver A2035-H The order number is built as follows: A2035-Hxxx A2035-H for the A2035-H module. The “xxx” reflects the current firmware version. If no firmware version is noted in an order, the latest version will be provided. 2.2 Packing The A2035-H GPS modules come in a tape and reel package suitable for pick and place machines. Figure 2: A2035-H tape specifications (1) V1.
Figure 3: A2035-H tape specifications (2) Figure 4: A2035-H tape specifications (3) One complete reel holds 700 A2035-H modules. There are 2 kinds of packaging for shipment: A: One box holds 1 reel Reel diameter: 38 cm Outer Box dimensions: 38.8 (W) x 38.8 (L) x 5.7 (H) cm Gross weight: 5.06 Kg Net weight: 4.13 Kg V1.
B: One box holds 2 reels Reel diameter: 38 cm Outer box dimensions: 38 (W) x 38 (L) x 12.3 (H) cm Gross weight: 10.03 Kg Net weight: 8.26 Kg V1.
2.3 Additional Equipment EVA2035-H Evaluation Kit (including one module A2035-H) Table 3: Additional equipment A detailed description of the EVA2035-H Evaluation Kit can be found in the appropriate manual. V1.
3 Quick Start In order to allow an easy and quick start with the A2035-H module, this chapter provides a short overview on the important steps to be taken to receive NMEA messages with position information on a serial port (UART). NOTE 1: The A2035-H needs an external pull-up resistor to be configured for UART operation. Please consider the pull-up resistor in your design or pull the GPIO up right after reset by other means.
NOTE: Care must be taken to implement an orderly shut-down sequence along with supplying power for a certain period of time after initiating the shut-down sequence. Abrupt removal or drop of power while the module is running has risks ranging from minor impact on TTFF to fatal corruption of flash memory code area (Please refer to “Power ONOFF Sequences and Power-On-Reset (POR) on A2100-AB Application Notes”)! For completeness the following pictures show the use of an RS232 level shifter. C2 0.
3.2 Antenna The A2035-H through the LNA connected to a ceramic passive GPS patch antenna. 3.3 Serial Port Settings The default configuration within the custom-specific GPS firmware is: Serial 0 (NMEA) 4800 baud, 8 data bits, no parity, 1 stop bit, no flow control 3.4 Improved TTFF In order to improve the TTFF (Time To First Fix), it is recommended to keep Vcc supplied at all times. This will allow taking advantage of sophisticated low power mode features of the SiRFstarIV chip set.
3.5.2 OSP MID 148 Command It simply puts the receiver into internal boot mode. It is designed for receiver which has a problem of doing the Hardware Bootstrap due to the design. Internal boot mode allows you to reflash the embedded code in the receiver. Firmware loaded with 4.1.0 and above could take advantage of this procedure. A0A20001 – Start sequence and payload length (1 byte ) 94 – Payload 0094B0B3 – Message checksum and end sequence 3.5.
3.6 Self-start Configuration In order to minimize the GPIO required for operating A2035-H, WAKEUP (pin 4) and ON_OFF (pin 18) can be tied together for entering the self-start mode such that no ON_OFF pulse requires. The following picture shows the recommended connection for self-start configuration with UART host port enabled. Figure 8: Self-start configuration A2035-H For self-start mode, full power operation will be activated once Vcc applied.
4 Mechanical Outline 4.1 Details Component Side A2035-H All dimensions in [mm] / [(inches)] Figure 9: Mechanical outline component side A2035-H V1.
4.2 Details Solder Side A2035-H 13.97 (.55) 1.27 (.05) 1.27 (.05) 29.845 (1.175) 30.48 (1.2) 2.54 (.10) 3.81 (.15) 1.27 (.05) 3.81 (.15) 1.27 x 1.27 3.81 (.15) 2.54 (.10) 1.0 x 0.8 3.81 (.15) 16.51 (0.65) Solder pad size (outer pads): 1.0 x 0.8 Solder pad size (inner pads): 1.27 x 1.27 All dimensions in [mm] / [(inches)] Figure 10: Mechanical outline solder side A2035-H V1.
5 Pin-out Information 5.1 Layout A2035-H Figure 11: Pin-out information (bottom view) A2035-H V1.
5.2 Description A2035-H Signals Pin Symbol Function Description 1 2 nRST BOOTSEL Input Input 3 4 Vcc WAKEUP Power Supply Output 5 6 7 Vout GND GPIO6 / CTS/ SPI CLK GPIO7 / RTS/ SPI CS GND NC NC NC NC ExtInt 2 / GPIO4 TM_GPIO5 I2C CLK I2C DIO ON_OFF Voltage Output Power Supply Input Input Reset input, active low Special boot mode – leave open for normal operation; 1.8V for boot loader active 3.0 – 3.
6 Electrical Characteristics 6.1 Operating Conditions Pin 3 Description Vcc Min 3.0V Full power mode (Searching) Peak Current (1) Full power mode (Searching) Average Current (2) Typical 3.3V 49mA （TBC） 41mA Full power mode (Tracking) Average Current (3) 24mA Push-to-Fix Mode 920uA Micro Power Mode（SiRFaware TM ） Hibernate Status Max 3.
6.3 DC Electrical Characteristics Symbol Parameter Min Max Unit TX0, WAKEUP Voh @ 4mA Vol @ 4mA Vih Vil For safe reset Vih Vil Vih 2.6 Vcc 0.45 Vcc 0.8 0.2 Vcc 0.45 2.2 V V V V V V V V RX0 nRST ON_OFF BOOTSEL 2.0 1.35 -0.3 1.35 Table 8: DC electrical characteristics V1.
7 Mounting This chapter describes the suggested mounting process for the A2035-H receiver modules. In a RoHS compliant product with a RoHS compliant process it is recommended to use chemical tin as the counter-part to the module’s pins. This will guarantee highest resistance against shocks. 7.1 Proposed Footprint for Soldering The following proposal of a footprint for soldering is assuming a stencil thickness of 150µm. marks the center of the through holes.
7.2 Recommended Profile for Reflow Soldering Typical values for reflow soldering of the module in convection or IR/convection ovens are as follows (according to IPC/JEDEC J-STD-020D): Parameter Peak temperature (RoHS compliant process) Average ramp up rate to peak (217°C to Peak) Preheat temperature Ramp up time from min. to max. preheat temperature Temperature maintained above 217°C Time within 5°C of actual peak temperature Ramp down rate Time 25°C to peak temperature Value 245°C 3°C / second max.
8 Quality and Reliability 8.1 Environmental Conditions Operating temperature Operating humidity MSL JEDEC (Moisture Sensitivity Level) Storage -40°C … +85C Max. 85% r. H., non-condensing, at 85C 3 6 months in original package Table 10: Environmental conditions 8.2 Product Qualification Prior to product qualification the GPS receiver is preconditioned according to EIA/JEDEC standard JESD22-A113-B / Level 3.
9 Applications and Hints 9.1 Initial Module Start After initially applying power to the module, it is necessary to start the internal firmware by toggling the ON_OFF pin. Toggling is done by pulling the signal to HIGH for about 200ms. This first toggling can be done after a LOW – HIGH transmission was detected at the WAKEUP pin or by simply waiting for 1s after power-up. In case of configuration for UART mode, messages should be transmitted afterwards.
titled “Set TricklePower Parameters”. In order to request a fix outside the specified duty cycles, it is necessary to toggle the ON_OFF pin. Toggling is done by pulling the signal to HIGH for about 200ms. 9.5 Hibernate Mode In order to enter Hibernate Mode it is necessary to send a shutdown command or to toggle to ON_OFF pin by pulling the signal to HIGH for about 200ms. Starting with firmware version 4.0.1 the according command is supported in NMEA and SiRF Binary mode.
10m position deviation ≈ 33ns 1PPS deviation (typically) 100m position deviation ≈ 333ns 1PPS deviation (typically) The NMEA messages containing absolute timing information (UTC time) are provided around 300ms after the 1PPS signal typically. This may change with the GPS receiver setup. The 1PPS signal is provided on a “as is” basis with no accuracy specification. It’s NOT recommended to use 1PPS signal for accurate timing application.
10 Evaluation Kit EVA2035-H For demonstration and easy evaluation of GPS performance Maestro offers an evaluation kit (including one GPS A2035-H module). It contains a USB interface with according drivers to connect easily to a PC. The USB interface is an extension of the serial port 0, therefore sending NMEA sentences and accepting commands. At the same time it provides power to the module. Accompanied by an antenna it offers a ready-to-go set.
11 Related Information 11.1 Contact This manual was created with due diligence. We hope that it will be helpful to the user to get the most out of the GPS module. Any inputs regarding possible errors or mistakable verbalizations, and comments or proposals for further improvements to this document, made to Maestro, HongKong, are highly appreciated. Maestro Wireless Solutions Limited Add: Unit 3603-09,36/F.,118 Connaught Road West,HK Main Line: (852) 28690688 Fax: (852)25254701 support-gps@maestro-wireless.
12 List of Figures Figure 1: A2035-H label ........................................................................................... 8 Figure 2: A2035-H tape specifications (1) .............................................................. 10 Figure 3: A2035-H tape specifications (2) .............................................................. 11 Figure 4: A2035-H tape specifications (3) .............................................................. 11 Figure 5: Minimum configuration A2035-H ...........
13 List of Tables Table 1: A2035-H GPS characteristics ..................................................................... 9 Table 2: A2035-H dimensions and weight................................................................ 9 Table 3: Additional equipment ................................................................................ 13 Table 4: BOOTSEL operating mode ...................................................................... 16 Table 5: Pin description A2035-H............................
