Timer using CY8C4126AXI-S433 internal clock

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
hesc_1314511
Level 3
Level 3
10 sign-ins First solution authored 10 replies posted

Hello

I am using the internal cock of the CY8C4126AXI-S433, the precision when using the timer has an error, I set a 10 second timer, the timer comes out after 12 seconds. How can I adjust the accuracy? Thank you

Henry

0 Likes
1 Solution
NoriTan
Employee
Employee
25 sign-ins 5 questions asked 10 sign-ins

Henry,

What accuracy do you want?

The error ratio of 12 seconds to 10 minutes (600 seconds) is 2%.  As described in the datasheet as follows, the maximum error of the IMO internal oscillator is +/-2%.

GS004824.png

So, it is not expected to have more accurate internal clock than you experienced.

There is another internal clock ILO and its error is very big as follows.

GS004825.png

The maximum error for 10 minutes is -5/+10 minutes.

The PSoC 4100S has Watch Clock Oscillator (WCO) block to generate a LFCLK with a resonator.

GS004826.png

It is recommended to add a 32kHz external crystal to have more accurate clock that is available for a timer.

Regards,

Noriaki

View solution in original post

0 Likes
5 Replies