https://e2echina.ti.com/support/clock-and-timing/zh-CNTelligent Community 13https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3913532Fri, 31 Jul 2026 08:03:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:16a859dd-12eb-473e-b386-129a57c82255user139110820M晶振上电后测量XIN和Y0波形如下，第一通道XIN，第二通道Y0 用示波器探头点住XIN对地电容的XIN端，输出能测量到20M时钟，波形如下： 示波器规格如下https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3913528Fri, 31 Jul 2026 07:52:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:3c5073d8-37cf-45af-a4f5-76684953ce7aFRANK1手里没硬件调试， datasheet范围是8~50MHz。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3913527Fri, 31 Jul 2026 07:49:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d157170b-7a3f-4b42-8c75-5776d6e987eaFRANK1手里没硬件调试， datasheet范围是https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087270/lmk04832-lmk04832-spi/3913471Fri, 31 Jul 2026 02:06:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:fb82bed1-fbeb-42ab-9ca5-465d45dde1bbAlice您好， 电平转换芯片支持三线SPI的SDIO的双向通讯吗？ 链接帖子也同样使用了 NLSX5014，是贵司的案例吗？请参考此贴内的回复 LMK04832: LMK04832 SPI interface cannot read back data - Clock & timing forum - Clock & timing - TI E2E support forumshttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087250/lmx2594evm-rf-output-impdedance/3913464Fri, 31 Jul 2026 01:03:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:62f0d442-5e40-4211-b58e-cc74b515f02fVivian GaoRefer to datasheethttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087270/lmk04832-lmk04832-spi/3913454Thu, 30 Jul 2026 23:24:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4c80eba9-d5a4-4448-a73f-cc7911799d43Lydia您好， 已 经 收到了您的案例， 调查 需要些 时间 ，感 谢 您的耐心等待。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087270/lmk04832-lmk04832-spiThu, 30 Jul 2026 12:22:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:f7dec22e-32a6-4488-b109-b57e91e9dd90SHUNDA ZHONGPart Number: LMK04832 您好： FPGA芯片（IO为1.2V）经过电平转换芯片（NLSX5014MUTAG）后由三线SPI配置加载LMK04832（3.3V供电），LMK04832可以正常加载且时钟也正常输出，但是三线SPI却无法回读LMK04832信息，请问是什么原因呢？数据通信模块LMK04832https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087250/lmx2594evm-rf-output-impdedance/3913431Thu, 30 Jul 2026 07:51:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:fb91718f-ed57-4bbd-a6da-2686e511c0b9Vivian GaoThank you for your attention to TI products. We are verifying your issue, please wait for our reply.https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087250/lmx2594evm-rf-output-impdedanceThu, 30 Jul 2026 07:47:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cc5dea4e-9848-44a7-9bca-8064751ab310Jifei ChenPart Number: LMX2594EVM Other Parts Discussed in Thread: LMX2594 Hello, One month ago, I asked one tech issue about LMX2594 chip RF output power. Today, I have another tech issue during design the circuits according to the schematic of LMX2594 EVB board. What's the RF output impedance of LMX2594 eval board? thanks, Jifeilmx2594工业自动化LMX2594EVMhttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1084301/lmx2594-what-s-the-power-output-for-915mhz/3913430Thu, 30 Jul 2026 07:31:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:095fefdd-e046-4e79-bbc3-b8db04fc7c39LydiaHi， For follow-up questions, you can continue to communicate with Noel Fung.https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1084301/lmx2594-what-s-the-power-output-for-915mhz/3913429Thu, 30 Jul 2026 07:03:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:d72e916b-c021-4ff8-bfae-d7913b747fbcJifei Chenhello， could you help to ask another tech issue as the below shown: what is the output impedance of RF output on the LMX2594 EVB board schematic? thanks, Jifei Chenhttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3913425Thu, 30 Jul 2026 06:33:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4657e7d4-c8f4-4fd3-8e5f-a6ab6e0c7c31user1391108你们有试过20M晶体吗？是否可以起振？我们换了48M晶体能起振，但20M不行。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087045/cdclvd1216-cdclvd1216/3913414Thu, 30 Jul 2026 04:27:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4514766d-d8b5-43f4-8e02-955d79b35cbaVivian Gao1. 不建议，建议您按照手册来做。如果过小可能导致反射大，过驱。 2. 您的INP0和VAC_REF0应该按照您的截图里面的Figure 17电路结构去设计。 INP1如果不用，接1k下拉符合要求。 e2e.ti.com/.../624066 VAC_REF1如果不用，见下方链接的接法。 CDCLVD1216: what to do with VAC_REF0/1 when not used? - Clock & timing forum - Clock & timing - TI E2E support forumshttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3913412Thu, 30 Jul 2026 04:18:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:cfb6ff58-d95d-439b-a46b-04fb70754656FRANK1如果你换了推荐的晶振也不好用，那再查查电路，走线， 你看看我给你的我们评估板的电路。排查下。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087045/cdclvd1216-cdclvd1216/3912640Wed, 29 Jul 2026 07:42:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:85f693d6-5a5b-476d-80d4-c11f5913e47eVivian Gao感谢您对TI产品的关注。 我们正在核实您的问题，请等待我们的答复。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1087045/cdclvd1216-cdclvd1216Wed, 29 Jul 2026 07:34:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:968d6cbc-78ff-442e-a993-d1bbd55aaebeuser1359349Part Number: CDCLVD1216 TI的专家你好 请问CDCLVD1216 这个芯片， 1：如果输入信号是有源（3.3V）差分晶振提供的156.25M的LVPECL时钟，下图这个电子必须串接75R的吗，串接22R可以吗，如果串接22R，会导致什么后果？ 2：下图2中，圈出来的地方，设计是否正确 请帮忙看看，谢谢 x有线网络CDCLVD1216https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3912636Wed, 29 Jul 2026 07:31:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:4e99f0c4-8d00-4489-b4b1-a2c844fc1539user1391108按照这个report更换了晶体，还是无法起振，晶体输入输出的波形如下，能否分析一下故障原因。https://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086779/cdclvc1310-cdclvc1310/3912602Wed, 29 Jul 2026 00:27:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:0b117637-c014-4560-89ce-55d3f4a89820FRANK1你可以看看CDCLVC1310晶振的选型application report， CrystalOscillatorPerformanceoftheCDCLVC1310 https://www.ti.com/lit/an/scaa119/scaa119.pdf?ts=1785203514906 另外，你也可以看看我们评估版选择的晶振和设计电路，在下面链接文件的末尾有BOM和电路图。 www.ti.com.cn/.../scau046.pdfhttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086781/cdclvp1204-cdclvp1204rgtr-vacref/3911741Tue, 28 Jul 2026 05:51:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:34a71b22-6151-4ac7-ac8e-9841429cc0dbFRANK1你这种情况， VACREF引脚 可以floating。 (+) CDCLVP1204: unused Vac_ref pin - Clock & timing forum - Clock & timing - TI E2E support forumshttps://e2echina.ti.com/support/clock-and-timing/f/clock-timing-forum/1086781/cdclvp1204-cdclvp1204rgtr-vacref/3911717Tue, 28 Jul 2026 02:13:00 GMT91561404-af28-475a-b96b-cb6cbaadd097:e2ada75f-34f0-47bf-b87d-9c68e34eae8bFRANK1感谢您对TI产品的关注！ 关于你的咨询，我们正在确认您的问题，感谢您的耐心等待。