I am using Internal RTC of LPC1768 but is lagging by 4 & half minutes for 1 hour. Is there any solution to make it accurate or this is the problem of LPC1768 internal RTC?
Hi Omkar,
Which silicon revision is your MCU? Please notice that Revision A does not suffer from the RTC.1 erratum. The RTC oscillator is expected to work fine on rev A silicon.
Hope it helps!
Best Regards,
Carlos Mendoza
Technical Support Engineer
Hi,
Thanks for help but Where do i check the which revision i am using, Is
there anything mention on Controller chip?
Thanks & regards,
Omkar Teli.
On Tue, Feb 21, 2017 at 10:53 PM, Carlos_Mendoza <admin@community.nxp.com>
Hi Omkar,
The LPC176x devices typically have the following top-side marking:
LPC176xxxx
xxxxxxx
xxYYWWR[x]
The last/second to last letter in the third line (field ‘R’) will identify the device revision.
Hope it helps!
Best Regards,
Carlos Mendoza
Technical Support Engineer
hi,
there is "LPC1768FBD100
SW1441.1
ZSD1219A"
so it is revision A?
Thanks & regards,
Omkar Teli.
On Thu, Feb 23, 2017 at 5:09 AM, Carlos_Mendoza <admin@community.nxp.com>
Hi Omkar,
Yes, it is the Rev. A, this revision does not suffer from the RTC.1 erratum. The RTC oscillator is expected to work fine on rev A silicon. Which application are you suing? Have you tried the periph_rtc example that comes with LPCOpen?