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Otros manuales para este modelo:
Resumen del manual
Lee Preliminary draft 1.1 2008/11/12 J. Lee Re-define the pin assignment and confirm the dimension 1.2 2008/11/19 J. Lee Re-organize the structure & revise specs 1.3 2008/12/22 J. Lee Re-define the SW baud rate/storage temperature/Power C. & Add mechanical drawing 1.4 2008/12/30 J. Lee Modify the USB power supply and power consumption & add mode definition 1.5 2008/12/31 J. Lee Add electrical specification/reference design and revise the DGPS description 1.6 2009/1/9 J. Lee Add the electrical specification & reference design and reset in order 1.7 2009/1/16 J. Lee Revise the description of TTFF measurement & the searching channels, and add the module pic 1.8 2009/3/5 J. Lee Add packing/reflow profile/storage & baking condition and re-organize the wording 1.9 2009/6/3 J. Lee Position accuracy revised ALL INFORMATION CONTAINED HEREIN IS THE SOLE PROPERTY OF LEADTEK RESEARCH AND CANNOT BE DISSEMINATED WITHOUT THE EXPRESS WRITTEN CONSENT OF LEADTEK RESEARCH. i LR9023 Specifications Sheet Rev. 1.8 1. Introduction The Leadtek LR9023 module is a high sensitivity, low power and very compact Surface Mount Device (SMD), and it supports signal processing of L1 band signals such as GPS C/A and SBAS (including WAAS, EGNOS, and MSAS). This 22-channel global positioning system (GPS) receiver is designed for a broad spectrum of OEM applications and is based on the fast and deep GPS signal search capabilities of Mediatek MT3329 architecture, consuming . Leadtek LR9023 is designed to allow quick and easy integration into GPS-related applications, especially for compact size devices, such as: PDA, Pocket PC and other computing devices Fleet Management / Asset Tracking AVL and Location-Based Services Hand-held Device for Personal Positioning and Navigation 1.1. Features Hardware and Software 22 tracking/ 66 acquisition channels Based on the high performance features of the Mediatek MT3329 chipset. Advanced DBA technology to achieve -165dBm tracking Compact module size for easy integration: 11.4x10.0x2.0 mm. SMT pads allow for fully automatic assembly processes equipment and reflow soldering Multi-path Mitigation Hardware Built-in antenna detection and provided GPS Status information Built-in LDO, regulators & USB interface to decrease extra-BOM cost Up to 10Hz update rate Embedded DC/DC circuitry to prolong battery life AGPS supported Performance Cold/Warm/Hot Start Time: 35 / 34 / 1.5 sec. Reacquisition< 1 sec © 2008 Leadtek Research Inc. All rights reserved. Page 1/16 Leadtek Confidential -Information is subject to change without prior notice. LR9023 Specifications Sheet Rev. 1.8 RF Metal Shield for best performance in noisy environments Enhanced Navigation Performance Improved Jamming Mitigation Interface TTL level serial port and USBV2.0 full speed complaint interface UART interface Protocol: NMEA Baud Rate: 9600 bps(Default) Advantages Ideal for compact size devices Data / Power / RF through surface mount pads Cost saving through elimination of RF and board to board digital connectors Flexible and cost effective hardware design for different application requirements Secure SMD PCB mounting method 2. Technical specifications 2.1. Module architecture © 2008 Leadtek Research Inc. All rights reserved. Page 2/16 Leadtek Confidential -Information is subject to change without prior noti LR9023 Specifications Sheet Rev. 1.8 Component Part number Manufacturer FC-135/MC-146 EPSON RTC X'tal 32.768KHz ±20ppm CC7V Micro Crystal ST-4115A Hertz Table 2-1 Recommended RTC X’tal list 2.2. Software The firmware used on Leadtek 9023 for Mediatek receivers and its features include: High configurability Up to 10 Hz position update rate Supports use of satellite-based augmentation systems including WAAS, EGNOS, MSAS NMEA 0183 standard V3.01 and backward compliance and support 219 different Datum Default configuration is as follows: Item Description Core of firmware MTK version AXN_1.1 Baud rate 9600 bps Code type NMEA-0183 ASCII Datum WGS-84 Protocol message GGA(1s), GSA(5s), GSV(5s), RMC(1s),VTG(1s) Output frequency 1 Hz 2.3. Electrical specification 2.3.1 Absolute maximum ratings Parameter Symbol Min Max Units Power supply voltage VCC-IN -0.3 4.3 V Backup battery voltage RTC-VDD-INPUT -0.3 4.3 V USB supply voltage USB-VDD -0.3 3.6 V © 2008 Leadtek Research Inc. All rights reserved. Page 3/16 Leadtek Confidential -Information is subject to change without prior notice. LR9023 Specifications Sheet Rev. 1.8 2.3.2 Operation Conditions Parameter Symbol Min Typ Max Units Power Supply Power supply voltage VCC-IN 3 3.3 4.3 V Backup battery voltage RTC-VDD-INPUT 2 2.8 4.3 V USB supply voltage USB-VDD 3 3.3 3.6 V UART and I/O Input Low Voltage -0.3 0.8 V Input High Voltage 2 3.6 V Output Low Voltage -0.3 0.4 V Output High Voltage 2.4 2.8 V Total Input Gain 20 50 dB 2.3.3 Power Consumption Status Power Consumption Acquisitioning 40mA Tracking 33mA Power save mode 29.47mA Periodic mode 6~33mA(ON/OFF) Mode TCXO PLL DSP Power (mW) To fix latency (sec) Note ...