ColdFire/68K Microcontrollers and ProcessorsのトピックRe: Urgent : For setting RTCCR register

Urgent : For setting RTCCR register

roop — Fri, 13 Nov 2009 19:40:05 GMT

Hi all,

I am using a MCF52213 microcontroller, I want implement a RTC module for that I am setting RTCCR register. When I read this register it always display zero value.

Please help me to resolve this problem.

Regards,

Roop

Re: Urgent : For setting RTCCR register

mjbcswitzerland — Sat, 14 Nov 2009 00:45:20 GMT

Hi Roop

There are several discussions about the RTC in the V2 MCU devices in the forum. Try the following: http://forums.freescale.com/freescale/board/message?board.id=CFCOMM&message.id=7891&query.id=76784#M7891

Regards

Mark

Re: Urgent : For setting RTCCR register

roop — Mon, 16 Nov 2009 14:49:31 GMT

hi,

I not able set RTCCR register. In link u are you are tell about the secret bit , I want to set this bit.

Actually I want to set RTCCR register but any value I write in this register it always give me a zero value.This register is access in any supervisor mode as written in dataset of MCF52213. Is any special setting is required to write this register ?

Re: Urgent : For setting RTCCR register

mjbcswitzerland — Mon, 16 Nov 2009 15:23:46 GMT

Have you first enabled the RTC by setting the enable bit (0x80) inthe RTCCTL register?

Do you also have a voltage connected to the Vbat pin?

Regards

Mark

Re: Urgent : For setting RTCCR register

roop — Mon, 16 Nov 2009 19:21:02 GMT

A voltage connected to the Vstby and to RTC module we write in RTCCTL =0x80 but when we read this value itis also give zero.

We are also set other register of RTC module and read this registers, they all return zero value .

Coluld you please explain why we are not able to write into any regrister related to RTC ?