Related Manuals for unicore UC6226NIS-E310E2
Summary of Contents for unicore UC6226NIS-E310E2
- Page 1 HARDWARE REFERENCE DESIGN WWW.UNICORECOMM.COM UC6226NIS-E310E2 (QFN40) GNSS Positioning Chip Copyright© 2009-2023, Unicore Communications, Inc. Data subject to change without notice.
- Page 2 Unicore with respect to the fitness for a particular purpose/use, the accuracy, reliability and correctness of the information contained herein. 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...
- Page 3 UC6226NIS-E310E2 (QFN40) Hardware Reference Design not be completely consistent with such information of the specific product you purchase. Should you purchase our product and encounter any inconsistency, please contact us or our local authorized distributor for the most up-to-date version of this manual along with...
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Page 4: Table Of Contents
Contents Reference Design ......................1 Basic Design ...................... 1 Antenna Detection ..................... 2 Attention ........................3 Power ......................... 3 RTC ........................4 TCXO ........................5 Recommended BOM ....................5... -
Page 5: Reference Design
UC6226NIS-E310E2 (QFN40) Hardware Reference Design 1 Reference Design 1.1 Basic Design External LNA RTC Crystal UART interface It is recommended to use an external independent LDO to power the TCXO. The specification of the external power should meet the requirement of the TCXO. -
Page 6: Antenna Detection
1.2 Antenna Detection Main Supply: 1.20V~1.98V RF, Short 50ohm Line IO Supply: 1.77V~1.88V Backup Supply: 1.65V~3.6V UC6226-QFN40 TCXO VANT: +3.3 V Antenna State OPEN_DET SHORT_DET Open circuit Short circuit Normal In the figure above, “VANT” is a standard power supply of +3.3 V which feeds the antenna through a 33 nH inductor L5 at the upper right. -
Page 7: Attention
UC6226NIS-E310E2 (QFN40) Hardware Reference Design If the antenna power supply and the chip’s main supply use the same power rail, the ESD, surge and overvoltage from the antenna will have an effect on the main supply, which may cause damage to the chip. Therefore, it’s recommended to design an independent power rail for the antenna to reduce the possibility of damage to the chip. -
Page 8: Rtc
2.2 RTC RTC is usually driven by 32.768 kHz oscillator, which needs to connect external 32.768 kHz crystal. If GNSS hot start function is not needed, RTC crystal can be omitted. Under this condition, RTC_O should be grounded, and RTC_I should be floating. UC6226 also supports external 32.768 kHz digital clock signal directly input RTC_I pin to replace the crystal. -
Page 9: Tcxo
UC6226NIS-E310E2 (QFN40) Hardware Reference Design 2.3 TCXO The CLK_I pin is used for connecting an external TCXO of 26 MHz. It is recommended to use an external independent LDO to power the TCXO. The basic parameter requirements for TCXO are as follows: Frequency and temperature: 26 MHz ±... - Page 10 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.unicorecomm.com Phone: 86-10-69939800 Fax: 86-10-69939888 info@unicorecomm.com www.unicorecomm.com...