RE: Re: MPC555 Real Time Clock Block Diagram Figure 6-6: MPC555UM.pdf
"Dobbin Allan-r11834" <[email protected]>
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers |
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| Message-ID | <4147ED8B92A864498825C07E53594E4A322A63@az33exm20.fsl.freescale.net> |
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 Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> Get Bzzzy! (real tools to help you find a job). Welcome to the Sweet Life. http://us.click.yahoo.com/A77XvD/vlQLAA/TtwFAA/dN_tlB/TM --------------------------------------------------------------------~-> ----------------------------------------------------------- To learn more about Freescale Microcontrollers, please visit http://www.freescale.com/mcu Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/MPC500/ <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/