Hi Chris,
I'm not an expert on this device. I recommend BQ32000 or BQ32002, these are our most popular RTCs.
I'll still provide some debug support to help you resolve your issue. Due to the age of this device, design support is limited.
What other…
Hello Philip,
You need to connect this to a frequency counter to measure the error and calibrate.
It sounds like you're looking at an oscilloscope..? Are you hoping to see changes in the pulse width / period measurement?
Please refer to the 2nd…
Hi Prematatha,
You may need a supercap greater than 1421µF. See https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/855446/bq32002-super-capacitor-value-suggestion for the math.
Leonardo Callegaro said: Thank you for your answer. Can you suggest any specific RTC chip?
This chip is widely used:
You can also have a look at more products here:
Regards,
Gautam
Hi Kevin,
IRQ is used to correct for the crystal frequency error. This E2E post:
https://e2e.ti.com/support/clock-and-timing/f/clock-timing-forum/703635/bq32002-bq32002-improper-time#pi320966=1
Has in depth description and examples of how to use…
