Re: MPC555 Real Time Clock Block Diagram Figure 6-6: MPC555UM.pdf

He didn't ask about the div 4/div256 settings.

--- In [email protected], "Dobbin Allan-r11834" 
<Allan.Dobbin@f...> wrote:
> SCCR[RTDIV] provides div 4 and div 256 settings.
> 
> Allan
> 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On 
Behalf
> Of Mark Allison
> Sent: Thursday, September 22, 2005 1:34 AM
> To: [email protected]
> Subject: [MPC500] Re: MPC555 Real Time Clock Block Diagram Figure 6-
6:
> MPC555UM.pdf
> 
> 
> --- In [email protected], "riaz_m_syed" <riaz_m_syed@y...> 
wrote:
> > I have a 4Mhz crystal as a reference to the RTC and then divide 
by 256
> 
> > Now, in the block diagram Figure 6-6, How do I select Divide by
> 15625 ?
> 
> Well I use the MPC565 and I have never used the RTC, but just 
reading 
> the short section entitled "6.14.4.5 Real-Time Clock Status and 
Control 
> Register" in the 565 user manual, it would seem to be bit 11 of the 
> RTCSC that selects between either the 4MHz (divide by 15625) or 
20MHz 
> (divide by  78125) source.
> 
> I presume the 555 will be the same ?
> 
> mwa
> 
> 
> 
> 
> 
> -----------------------------------------------------------
> To learn more about Freescale Microcontrollers, please visit
> http://www.freescale.com/mcu
> 
> 
>  
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