Lpc2000

Only 4 bits of VPBDIV are for controlling PCLK.  The other 4 are for
selecting the CCLK vs XCLK rate (i.e. XCLK = .25 x CCLK or .5 x CCLK or 1 x
CCLK).
  -----Original Message-----
  From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On Behalf Of
lpc2100_fan
  Sent: Tuesday, September 06, 2005 8:05 PM
  To: lpc2000@yahoogroups.com
  Subject: [lpc2000] Re: Who can tell me the relationship between XCLK and
CCLK?


  Mark,

  if I am not mistaken VPBDIV is there to divide CCLK into PCLK
  (Peripheral Clock).  XCLK is the external clock, which is identical to
  CCLK if the PLL is not used. Otherwise CCLK = XCLK * PLL factor

  Nevertheless I could not find XCLK either in the data sheet or the
  Users Manual, how did you come up with these terms?

  Bob

  --- In lpc2000@yahoogroups.com, "Mark Crow" <mcrow@p...> wrote:
  > Look at the LPC2000 user manual and look up the VPBDIV register.
  >   -----Original Message-----
  >   From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com]On
  Behalf Of
  > fangneu
  >   Sent: Monday, September 05, 2005 11:50 PM
  >   To: lpc2000@yahoogroups.com
  >   Subject: [lpc2000] Who can tell me the relationship between XCLK
  and CCLK?
  >
  >
  >   Thank you very much and I wish that somebody can help me!!
  >
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