Lpc2000

Thanks.  Now the same speed for Ram and Flash.  Here's what I did:
 
Benchmark: 5 byte memcpy from flash to ram.
 
12MHz osc, PLL disabled (cclk 12MHz), VPB=0 (1/4 cclk), MAM disabled:
30us.
12MHz osc, PLL disabled (cclk 12MHz), VPB=0 (1/4 cclk), MAM fully
enabled with 1 fetch cycle: 7.5us.
 
I'll have to see how much of a hit I took on the current draw.
 
Jeff.
 

	-----Original Message-----
	From: k b shah (lascaux) [mailto:kbshah@...] 
	Sent: Thursday, March 24, 2005 10:22 AM
	To: lpc2000@yahoogroups.com
	Subject: Re: [lpc2000] LPC2138: Ram vs Flash code execution
	
	
	It is a fact that the access from internal flash is slower then
internal RAM, that is the reasn they have MAM setting.... it actually
caches the instructions and execute from the cache, which results in
faster execution. there are three different settings .. 
	MAM -- off  --- slowest 
	MAM  -- partially on -- Execution time more predictable 
	MAM -- full on... best executin time.
	kb
	  ----- Original Message ----- 
	  From: Marko Pavlin (home) 
	  To: lpc2000@yahoogroups.com 
	  Sent: Thursday, March 24, 2005 12:49 PM
	  Subject: Re: [lpc2000] LPC2138: Ram vs Flash code execution
	
	
	  Runing from RAM runs at Cclk. Flash has 60ns access time,
which is 3x 
	  slower at 60MHz. Are you using MAM?
	
	  Lowry, Jeff wrote:
	
	  > Code running from internal RAM seems to run about 4x faster
than running
	  > from internal Flash. Is this true or do I have some settings
wrong?
	  > Anybody know where I can find fetch timings for Ram vs Flash
code
	  > execution?  Thanks, Jeff.
	
	
	
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