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Summary of Contents for unicore UM621A
- Page 1 HARDWARE REFERENCE DESIGN WWW.UNICORE.COM UM621 Series Multi-GNSS Dual-frequency Integrated Positioning Module Copyright© 2009-2024, Unicore Communications, Inc. Data subject to change without notice.
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Page 2: Revision History
The information contained in this manual is provided “as is” and is believed to be true and correct at the time of its publication or revision. This manual does not represent, and in any case, shall not be construed as a commitments or warranty on the part of Unicore... - Page 3 Information, such as product specifications, descriptions, features and user guide in this manual, are subject to change by Unicore at any time without prior notice, which may not be completely consistent with such information of the specific product you purchase.
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Page 4: Table Of Contents
Contents Reference Circuit Using an Active Antenna .............. 1 Reference Circuit Using a Passive Antenna .............. 2 Power Supply Requirements ..................3 Main Supply (VCC)..................... 3 Backup Supply (V_BCKP) .................. 3 Recommended BOM ....................4 Odometer Interfaces ....................4 Hardware Interface .................... 4 5.1.1 Odometer Reference Circuit and Waveform Diagram ...... -
Page 5: Reference Circuit Using An Active Antenna
UM621 Series Hardware Reference Design 1 Reference Circuit Using an Active Antenna The voltage range of VCC and V_BCKP are described in Chapter 3: Power Supply Requirements Ground all GND pins of the module Connect the RF_IN signal to the antenna and note the 50 Ω impedance matching ... -
Page 6: Reference Circuit Using A Passive Antenna
2 Reference Circuit Using a Passive Antenna When using a passive antenna, a low noise amplifier should be added between the antenna and the RF_IN of the module in order to ensure the performance of the system. For the RF routing (antenna LNA RF_IN), note the 50 Ω impedance matching ... -
Page 7: Power Supply Requirements
UM621 Series Hardware Reference Design 3 Power Supply Requirements 3.1 Main Supply (VCC) For the module that does not support wake-on-motion, the voltage range of VCC is 2.7 V ~ 3.6 V. For the module that supports wake-on-motion, the voltage range of VCC is 3.0 V ~ 3.6 V. -
Page 8: Recommended Bom
4 Recommended BOM Table 4-1 Recommended BOM Component Order No. Manufacturer RS-232 MAX3232EUE+ Transceivers MXDLN14TP MAXSCEND 5 Odometer Interfaces Odometer data can be input to the UM621 series modules via hardware interface or software interface. The two ways cannot be used at the same time. 5.1 Hardware Interface The Pin4 (WHEELTICK) of the UM621 series modules is used to receive the speed pulse signal from the odometer, and the Pin15 (FWD) is used to receive the direction signal from... -
Page 9: Odometer Reference Circuit And Waveform Diagram
UM621 Series Hardware Reference Design 5.1.1 Odometer Reference Circuit and Waveform Diagram Figure 5-2 Reference Circuit for Odometer The voltages of VCC, V_BCKP and SPEED/FWD shall meet the requirements in Table 5-1. Figure 5-3 Odometer Waveform Diagram... -
Page 10: Odometer Speed And Direction Signal
5.1.2 Odometer Speed and Direction Signal 5.1.2.1 Voltage Requirements Table 5-1 Voltage Requirements Item Symbol Min. Typ. Max. Unit Condition Non- Main Supply Non- Backup Supply V_BCKP Ripple Voltage WHEELTICK/FWD 0.2*VCC Low Level Input Voltage WHEELTICK/FWD 0.7*VCC VCC+0.2 High Level Input Voltage 5.1.2.2 Odometer (WHEELTICK) Frequency The odometer signal input to the module is required to be a square wave signal with a frequency not higher than 5 KHz. -
Page 11: Software Interface
UM621 Series Hardware Reference Design 5.1.2.3 Direction (FWD) Signal The module defaults to forward at high level and reverse at low level. It can be configured through the commands as shown below. Please refer to the protocol manual for details. forward at high level and reverse at low level $CFGODOFWD,1 forward at low level and reverse at high level... - Page 12 和芯星通科技（北京）有限公司 Unicore Communications, Inc. 北京市海淀区丰贤东路 7 号北斗星通大厦三层 F3, No.7, Fengxian East Road, Haidian, Beijing, P.R.China, 100094 www.unicore.com Phone: 86-10-69939800 Fax: 86-10-69939888 info@unicorecomm.com www.unicore.com...
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