https://e2e.ti.com/support/clock-timing-group/clock-and-timing/ Products covered in this section are Clock Generation & Distribution, Memory Interface, Registers, Real Time Clocks and Timers. en-USTelligent Community 13https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645060/tlc555-component-value-setting/6344354Wed, 13 May 2026 21:08:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:10b60689-bec3-4fad-ac6c-fdcad0afc56bRon MichallickEileen, The full FAQ is here: [FAQ] How do I design a-stable timer, oscillator, circuits using LMC555, TLC555, LM555, NA555, NE555, SA555, or SE555? Frequency is inverse to resistors. They could factor the resistors by 500/400 = 1.25 the previous value RA 12.5k (12.4k) , Rb = 166.25k (165k), Rd = 376 (374 ohms)https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645060/tlc555-component-value-setting/6344089Wed, 13 May 2026 17:43:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:28acc122-78a5-4685-84b5-28e62a9b29b6Ron MichallickEileen, I have no requirements for precision. The main point of the table was to convey the point that output is about 500Hz and 50% 1% resistors are fine. RB being 0.1% in table is point out that it is the most important resistor (of the three). The 5% for cap is to point that the capacitor is the main cause of output variance. It's tolerance, voltage and temperature modulations.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644742/lmx2595evm-usb2any-firmware-update-failure/6344064Wed, 13 May 2026 17:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1d5131db-58c8-4584-999b-046d06b88294Noel FungHi There, 2.7.0.0 is more than a decade old, it is not supported by TICS Pro. Could you try below? 1. Download USB2ANY Firmware Loader ( https://dr-download.ti.com/software-development/firmware/MD-063xo7KvuK/01.00.00.00/snvc166.zip ), unzip the .exe file to a folder. 2. Copy USB2ANY.dll from C:\Program Files (x86)\Texas Instruments\TICS Pro to the same folder of firmware loader. For example: 3. Save below text file to c:\Program Files (x86)\TI USB2ANY SDK\Firmware. e2e.ti.com/.../6560.USB2ANY_5F00_2_5F00_9_5F00_1_5F00_2.txt 4. Connect Reference Pro board to the PC via USB cable 5. Run USB2ANY Firmware Loader.exe 6. Click Yes 7. Click Cancel 8. Click Update Firmware . Make sure the correct text file is shown in "Update to firmware" pull down menu. 9. Click Yes 10. Follow the onscreen instruction to complete the update. I hope this works.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645060/tlc555-component-value-setting/6343737Wed, 13 May 2026 14:43:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:add7ac28-e62c-48fb-8415-99847605ad2cEileen HuHi Ron, What the precision requirements for the components? Are they listed in the first column of the table? If so, 0.1% tolerance resistors are not available in the customer's component library. Can they replace RB with 1% tolerance one? Regards, Eileenhttps://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645537/cdce6214-clock-problemWed, 13 May 2026 14:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d75eebbf-90a8-437b-bbaa-faad05fd762cDanilo A.Part Number: CDCE6214 Hi Team, Posting on behalf of our customer. I'll share this E2E post with our customer so he can reply when needed. I'm using TICS Pro software to design the register values ​​for the CDCE6214-Q1 offline. The input parameters are: reference clock = 40MHz, doubler = 1, integer = 64, NUM = 0, DEN = 10, PSA = 4, ZDM = OFF, SCC = OFF, DCO = OFF, IOD = 35. OUT1-4 have automatically calculated the required frequency of 18.285714MHz. However, when I press "calculate frequency plan," the software reports an error saying "invalid out1 frequency." What could be the reason and how to solve it? Thank you. Regards, DaniloCDCE6214-Q1Wired networkingCDCE6214https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644644/cdc6c-2-4ghz-emissions-causing-wi-fi-bt-desense/6343661Wed, 13 May 2026 13:46:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d84abc79-542e-43e6-9338-37517fa98d55Adam LockThe differences in package size, operating voltage, and local bypassing are noted. One of the two oscillators we can operate at 1.8V. We will revise the layout. Unfortunately the EVK has a very different layout and bypassing scheme than the CISPR test board. It would be good to know if there were specific emissions that caused the CISPR tests to be run on a different PCBA. If it was specifically due to emissions in the 2.4-2.5G band that would give me confidence in keeping the component in our design for the next build (revised layout, smaller package).https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644644/cdc6c-2-4ghz-emissions-causing-wi-fi-bt-desense/6343650Wed, 13 May 2026 13:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c71fbacd-9611-45c1-a66c-52730a7f82f8Adam LockThe state behavior is correct. We currently have XTAL testing in process. We expect results tomorrow.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644644/cdc6c-2-4ghz-emissions-causing-wi-fi-bt-desense/6343546Wed, 13 May 2026 12:34:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a99e0261-523f-4085-86f5-b86ab6869e96Grzegorz PelikanHi Adam, Conor If board from https://www.ti.com/lit/an/snaa438a/snaa438a.pdf works OK then I would try something like that with 2-4 additional 0402 or smaller X7R MLCC decoupling caps. I would also consider using IC in smaller package like DLX or DLY. Regards, Grzegorzhttps://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645331/cdce6214-cdce6124-syntonized-clock-servo/6343374Wed, 13 May 2026 10:04:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6a70ce73-b68e-4f9c-8a10-2363d21de33fTobias GreuterCDCE6214-Q1: Output Clock Pull Range - can I 24MHz Xtal be used as SECREF?https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1643873/lmk05318b-lmk05318b-the-output-signals-are-lost-when-the-chx_sync_en-bit-is-dynamically-modified/6343354Wed, 13 May 2026 09:46:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:472b61aa-e644-43eb-94b0-9d62378e73dbAngela RomeromHi Connor, This is my configuration, also I provide my .txt and .tcs configuration files: e2e.ti.com/.../5460.LMK05318B.tcs e2e.ti.com/.../LMK05318B.txt Also I see that when the signal is lost, there are two ways to recuperate the signal, or apply a SYNC or disable the bit CHX_SYNC_EN = 0. Our intention is that when the PLL is programmed for the first time, CH2_3_SYNC_EN and CH5_SYNC_EN are enabled so that both outputs are synchronised, but subsequently the one for channel 5 is disabled because we want to control only the 10 MHz output from channel 2. After that, we want to re-enable the synchronisation for channel 5, and that is when the signal disappears. When we encountered this issue, we tried disabling and re-enabling the various outputs, and the same behaviour occurs with all of them. So yes, you could say that the aim is to initially synchronise the outputs and use SYNC as a selective enable function only for certain outputs.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645367/lmk1c1104-recommended-clock-buffer-for-distributing-one-8mhz-clock-to-four-mcusWed, 13 May 2026 09:16:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2353fff6-a9de-480f-a64f-dcc9c0403166ConorPart Number: LMK1C1104 Hi, We are using four MCUs on a power controller board. Currently, each MCU has its own 8MHz crystal resonator, but we have an issue with clock frequency mismatch between the individual crystals. To solve this, we are considering using one 8MHz clock source and distributing it to all four MCUs. Our conditions are as follows: Clock frequency: 8MHz Number of MCUs: 4 Preferred clock format: CMOS / LVCMOS System supply rail: 5V Output-to-output skew: not mandatory, but lower skew is preferred We think LMK1C1104 may be a possible candidate because it is a 1:4 LVCMOS clock buffer. We understand that LMK1C1104 supports 1.8V / 2.5V / 3.3V operation and has 25ps output skew. Could you please confirm the following points? Is LMK1C1104 the recommended TI device for this application? Although our system is based on a 5V rail, if the MCU clock inputs can accept a 3.3V LVCMOS level, is it acceptable to use LMK1C1104 with a 3.3V supply? If a 5V CMOS clock level is mandatory, does TI have a recommended 5V-capable clock buffer or an alternative solution? Thanks, ConorIndustrial AutomationLMK1C1104https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645331/cdce6214-cdce6124-syntonized-clock-servoWed, 13 May 2026 07:55:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:4c88f10c-acef-4622-be72-c5ba5216522cTobias GreuterPart Number: CDCE6214 Hi TI team We're looking to use the CDCE6124 in a clock servo application where we use it to syntonize all local clocks (ADC @ 7.3728MHz , MCU @24 MHz, and MAC/PHY @ 25MHz) to a network timereference (gPTP protocol). Comparing local counters with sync messages the protocol outputs an error estimated to be within 150ppm with sync rate every 125ms. Step size sufficient around 1ppm Is the device suitable for this application? - Can the CDCE6214 continously adjust all frequencies in positive and negative direction, starting from the mentioned nominal frequencies - Is the device suitable to avoid clock glitches when applying change? - REFSEL to low, with an XTAL input as SECREF as a correct choice, no PRIREF? - Based on the example 7.2.3 in the data sheet , how is the frequency best steered in this servo loop? DCO mode on, then with evey correction signal, FREQ_INC_DEC_DELTA gets applied to the numerator, correct? What is the role of the DCO output divider, as exposed in TICSPro? - Any difference between the product versions, regarding registers and controlling the servo? Somewhat related post: (1) CDCE6214-Q1: Output Clock Pull Range - Clock & timing forum - Clock & timing - TI E2E support forums :CDCE6214-Q1CDCE6214https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1641366/lmx2594-lmx2594-no-assist-vco-calibration-fails-to-lock-at--30-c-some-chips-lock-while-others-don-t-on-the-same-board/6343050Wed, 13 May 2026 06:00:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a4da8885-17d6-4a81-8867-cb567113a9cdqin yuhttps://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1641366/lmx2594-lmx2594-no-assist-vco-calibration-fails-to-lock-at--30-c-some-chips-lock-while-others-don-t-on-the-same-board/6343047Wed, 13 May 2026 05:57:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5c76cac1-9d3c-416c-aacc-a83b787f6294qin yuHi, We have tried setting VCO_SEL to 4 or 5 initially and calibrating in NoAss mode, but the 12.916 GHz frequency cannot lock. In the 49J batch, at temperatures below -30°C, none of the chips can lock under initial conditions of VCO_SEL = 4 or 5. In the 5AJ batch, at temperatures below -30°C, the chips were able to lock under initial conditions of VCO_SEL = 4 or 5. We tried reducing the SPI speed to below 10M, but this did not resolve the issue. Setting VCO_SEL to 6 initially is the solution we discovered through experimentation.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1641366/lmx2594-lmx2594-no-assist-vco-calibration-fails-to-lock-at--30-c-some-chips-lock-while-others-don-t-on-the-same-board/6343023Wed, 13 May 2026 05:33:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:32ae6431-62b9-4746-85a4-ec07e3f3a772Noel FungHi There, I suggest do not use partial or full assist at the moment, let's focus on using no assist calibration. 12.916GHz is supported by VCO5 and VCO6. With initial VCO_SEL = 4, calibration is able to select the right VCO. When and where did you get the samples from? Could you also do a VCO data summary of the good and bad devices you have? At room temperature, program the unit to lock to 12.916MHz, readback the VCO data. Try with a lower SPI write speed, such as 10MHz. BTW, do you have series resistor between SPI interface of the device and the programming device?https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1645060/tlc555-component-value-setting/6342934Wed, 13 May 2026 03:58:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ef3e30ff-48cb-4dc4-bdfe-cd5675a67034Eileen HuHi Ron, Thank you for your reply. If the freq is 400Hz, how to set them? The customer needs another PWM signal with 4 00Hz freq and 50% duty cycle, the other condition is the same. Regards, Eileenhttps://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1643771/lmk04828-can-not-output-sdclkouty/6342902Wed, 13 May 2026 03:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:90830f3f-bad0-4127-9f83-110c229ac59f馨柔 ChiuI found that the 0x144 register of LMK04828 in our system can NOT be programmed. (That is, value of register 0x144 is always 0x00.) However, the other registers read back the value we wrote. If there is any limitation of specific steps to program 0x144 of LMK04828? Thanks.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644742/lmx2595evm-usb2any-firmware-update-failure/6342811Wed, 13 May 2026 02:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:22503d9b-f13a-44f6-9d31-6f7d0945e937Hyunki MoonHi, I tried changing the Windows language to English and retried the firmware update, but the same Memory verification error persists. Unfortunately I do not have access to a Win10 PC. I also tried the oldest version available on the website, TICS Pro v1.7.6.2, but it also requires a firmware update and fails with the same error. At this point, could you please provide a download link for an older version of TICS Pro that works with USB2ANY firmware v2.7.0.0? The only issue is that the current TICS Pro (v1.7.9.1) refuses to communicate without updating to v2.9.1.2, which consistently fails. An older TICS Pro would let me use the EVM immediately while this firmware update issue remains unresolved. Thank you.https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1643795/lmk00105-availability-for-data-transmission/6342767Wed, 13 May 2026 01:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:26122da6-0b16-4e4e-92ad-477c3d40009fMichael SrinivasanTakashi-san, The LMK00105 should be able to work with data transmission. Thanks, Michaelhttps://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/1644786/cdce925-cdce925-can-generate-the-freq-not-from-i2c/6342740Wed, 13 May 2026 01:07:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d9dac35a-32e3-4541-bb1e-6c102f3ba5c2Jaryd DukesHi Sean , We are currently looking into your query, we will get back to you within the next few days. Best, Jaryd