4 posts / 0 new
Last post
TA_Dialog
Offline
Last seen: 1 week 2 days ago
Joined: 2013-12-06 15:11
Crystal trimming

Does Dialog have a tool for crystal trimming?

BB_Dialog
Offline
Last seen: 5 months 6 days ago
Staff
Joined: 2013-12-05 14:44
Crystal trimming tool

Hi Bruce_1,

the DA14580 has an automated trimming mechanism. There is provision in the DA14580 for automating the
actual trimming of the 16 MHz crystal oscillator. This is a special hardware block that realizes the XTAL trimming
in a single step.
Two programmable parameters are involved in the trimming of the XTAL16M:
- TRIM_CTRL_REG[TRIM_TIME] ; time required for start-up, after this the trimming value in the CLK_FREQ_TRIM_REG can be applied.
- TRIM_CTRL_REG[SETTLE_TIME] ; time required to settle after applying the trim value,

However, an initial manual frequency measuring action is required to store the wanted value in the OTP header.
There's no tool for this.

best regards, Dialog support.

richard_lee
Offline
Last seen: 2 years 10 months ago
Joined: 2014-03-27 04:23
>However, an initial manual

>However, an initial manual frequency measuring action is required to store the wanted value in the OTP header.
Which item of OTP Header is right place we can write trim value after we finish crystal trimming by setting CLK_FREQ_TRIM_REG ?

BB_Dialog
Offline
Last seen: 5 months 6 days ago
Staff
Joined: 2013-12-05 14:44
Hi Richard_lee,

Hi Richard_lee,

it should be writen in the OTP header: "XTAL16MHz Trim Value"

Best regards,
Dialog BLE Support Team