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2005-11-17 by Karl Olsen
Hello all, To get the 48 MHz necessary for the LPC214x USB, you must use a crystal of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies are mentioned in the manual table 291 that lists the possible ISP baud rates with various crystal frequencies. Can you use serial ISP with 12/16/24 MHz, and with which baud rates? Karl Olsen
2005-11-17 by Joel Winarske
> To get the 48 MHz necessary for the LPC214x USB, you must use a crystal > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies are > mentioned in the manual table 291 that lists the possible ISP baud > rates with various crystal frequencies. Can you use serial ISP with > 12/16/24 MHz, and with which baud rates? At 12MHz the highest the Phillips Flash utility will connect is 38.4k baud. I cannot connect running a higher baud. Joel
2005-11-17 by Steve Franks
> Message: 25
> Date: Thu, 17 Nov 2005 09:37:47 -0800
> From: "Joel Winarske" <joelw@...>
> Subject: RE: LPC214x crystal frequencies
>
> > To get the 48 MHz necessary for the LPC214x USB, you must
> use a crystal
> > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies are
> > mentioned in the manual table 291 that lists the possible ISP baud
> > rates with various crystal frequencies. Can you use serial ISP with
> > 12/16/24 MHz, and with which baud rates?
>
> At 12MHz the highest the Phillips Flash utility will connect
> is 38.4k baud.
> I cannot connect running a higher baud.
>
> Joel
I've been doing serial stuff from some time and this matches my experience.
With an integer-MHz rate, the divisors are such that most all uart chipsets
will work fine up to 38.4k, after that the round-off error is too much for
the chipset to synch up with, which is why you see alot of 7.3828MHz,
14.xxx, and 3.8xx crystals on demo boards. I do alot of analog->digital
stuff and off-freq's tend to make that nasty (more divisor round-off), so I
just put up with running my uarts a bit slower. I've noticed alot of
off-shelf devices with serial ports running at 38.4k lately, and I suspect
the same argument applies. If you grab any of the Atmel AVR datasheets
(i.e. AtMega128) they've done the math for you in the "UART" section to give
exact numbers for %error given a crystal freq and a baudrate/divisor combo.
They state that %err's above 10% are not healthy, but in practice, I've seen
cheap serial ports on Wintel boxes give me garbage with errors as low as 3%.
If you are into that sort of thing, Silicon Lab's CP2102 UART<->USB bridge
will do integer baud rates (i.e. 128.0k instead of 115.2k, up to 1.0M, I
recall) and that can get you up to higher rates if you need to, and give you
usb in a 7mm sq. package. I think I'm going to go direct to implementing
the usb driver thread that's been going the last few days for new designs
myself...
Steve
Steve Franks, KE7BTE
Electrical & Firmware Engineer
Tucson Embedded Systems
(520) 575-7283 x171
(Opinions expressed are sole-ly that of Mr. Franks, and not Tucson Embedded
System)
I've always thought the American eagle needed a left wing and a right wing.
The right wing would see to it that economic interests had their legitimate
concerns addressed. The left wing would see to it that ordinary people were
included in the bargain. Both would keep the great bird on course. But with
two right wings or two left wings, it's no longer an eagle and it's going to
crash.
-Bill Moyers2005-11-17 by Ake Hedman, eurosource
Same here. /Ake Joel Winarske wrote: > > To get the 48 MHz necessary for the LPC214x USB, you must use a crystal > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies are > > mentioned in the manual table 291 that lists the possible ISP baud > > rates with various crystal frequencies. Can you use serial ISP with > > 12/16/24 MHz, and with which baud rates? > > At 12MHz the highest the Phillips Flash utility will connect is 38.4k > baud. > I cannot connect running a higher baud. > > Joel > > > > > SPONSORED LINKS > Microprocessor > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g> > Microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg> > Pic microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> > > 8051 microprocessor > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-17 by philips_apps
All, based on the algorithm the bootloader uses to determine the baudrate, as Joel already found out, it is correct that the max baudrate for 12 MHz is 38400 Baud. Will do some additional tests to determine the baudrates for 16 MHz and 24 MHz but we assume that 12 MHz will be the most used crystal as it provides functionality for USB and enables the 60 MHz max. CPU speed as well. Sorry for not providing the appropriate values in the table for the ISP, will update with the next reloease of the Users Manual but that might still take a little while. Robert --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote: > > > To get the 48 MHz necessary for the LPC214x USB, you must use a crystal > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies are > > mentioned in the manual table 291 that lists the possible ISP baud > > rates with various crystal frequencies. Can you use serial ISP with > > 12/16/24 MHz, and with which baud rates? > > At 12MHz the highest the Phillips Flash utility will connect is 38.4k baud.
> I cannot connect running a higher baud. > > Joel >
2005-11-17 by Ake Hedman, eurosource
Robert, I must say I like the responsiveness of Philips (through you) *a lot* on this list. This is exactly what many of us embedded consultants really need. Philips has been very low on my "design in" list before. Mostly because of the low interest for us who design solutions for others but never buy a lot of components ourselves.But I think this is about to change. I hope Philips will be as good as Microchip and others on samples and app. notes in he future. You are definitely on the way... Keep up the good work!!! /Ake philips_apps wrote: > All, > > based on the algorithm the bootloader uses to determine the > baudrate, as Joel already found out, it is correct that the max > baudrate for 12 MHz is 38400 Baud. > > Will do some additional tests to determine the baudrates for 16 MHz > and 24 MHz but we assume that 12 MHz will be the most used crystal > as it provides functionality for USB and enables the 60 MHz max. CPU > speed as well. > > Sorry for not providing the appropriate values in the table for the > ISP, will update with the next reloease of the Users Manual but that > might still take a little while. > > Robert > > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote: > > > > > To get the 48 MHz necessary for the LPC214x USB, you must use a > crystal > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies > are > > > mentioned in the manual table 291 that lists the possible ISP > baud > > > rates with various crystal frequencies. Can you use serial ISP > with > > > 12/16/24 MHz, and with which baud rates? > > > > At 12MHz the highest the Phillips Flash utility will connect is > 38.4k baud. > > I cannot connect running a higher baud. > > > > Joel > > > > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-17 by Robert Wood
>> I must say I like the responsiveness of Philips (through you) *a lot* on this list. This is exactly what many of us embedded consultants really need. Philips has been very low on my "design in" list before. Mostly because of the low interest for us who design solutions for others but never buy a lot of components ourselves.But I think this is about to change. I hope Philips will be as good as Microchip and others on samples and app. notes in he future. You are definitely on the way... << Yep, things are very different these days. Nearly everything is built in the far east, but the designs are still often done in Europe. The manufacturers simply have to support small design houses or they wouldn't sell silicon!
2005-11-17 by seangra
Based on my calculations, 16MHz can only get to 19,200 (7% error at 38,400) and 24MHz can get 38,400. If you went up to 48MHz crystal you could get 57,600. -- Sean --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> wrote: > > All, > > based on the algorithm the bootloader uses to determine the > baudrate, as Joel already found out, it is correct that the max > baudrate for 12 MHz is 38400 Baud. > > Will do some additional tests to determine the baudrates for 16 MHz > and 24 MHz but we assume that 12 MHz will be the most used crystal > as it provides functionality for USB and enables the 60 MHz max. CPU > speed as well. > > Sorry for not providing the appropriate values in the table for the > ISP, will update with the next reloease of the Users Manual but that > might still take a little while. > > Robert > > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote: > > > > > To get the 48 MHz necessary for the LPC214x USB, you must use a > crystal > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies > are > > > mentioned in the manual table 291 that lists the possible ISP > baud > > > rates with various crystal frequencies. Can you use serial ISP
> with > > > 12/16/24 MHz, and with which baud rates? > > > > At 12MHz the highest the Phillips Flash utility will connect is > 38.4k baud. > > I cannot connect running a higher baud. > > > > Joel > > >
2005-11-17 by philips_apps
Confirmed 12 MHz -> max baudrate 38400 16 MHz -> max baudrate 19200 24 MHz -> max baudrate 38400 Robert --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote: > > Based on my calculations, 16MHz can only get to 19,200 (7% error at > 38,400) and 24MHz can get 38,400. If you went up to 48MHz crystal > you could get 57,600. > > -- Sean > > --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> > wrote: > > > > All, > > > > based on the algorithm the bootloader uses to determine the > > baudrate, as Joel already found out, it is correct that the max > > baudrate for 12 MHz is 38400 Baud. > > > > Will do some additional tests to determine the baudrates for 16 > MHz > > and 24 MHz but we assume that 12 MHz will be the most used crystal > > as it provides functionality for USB and enables the 60 MHz max. > CPU > > speed as well. > > > > Sorry for not providing the appropriate values in the table for > the > > ISP, will update with the next reloease of the Users Manual but > that > > might still take a little while. > > > > Robert > > > > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> wrote: > > > > > > > To get the 48 MHz necessary for the LPC214x USB, you must use > a > > crystal > > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these frequencies > > are > > > > mentioned in the manual table 291 that lists the possible ISP > > baud > > > > rates with various crystal frequencies. Can you use serial > ISP > > with > > > > 12/16/24 MHz, and with which baud rates? > > > > > > At 12MHz the highest the Phillips Flash utility will connect is
> > 38.4k baud. > > > I cannot connect running a higher baud. > > > > > > Joel > > > > > >
2005-11-18 by Martin Maurer
Hi Robert,
is there any plan to use the fractional baudrate generation in the booter,
so you can boot e.g. even at 921 kbit/s with a 12 MHz oscillator ?
Theoretically it should be possible, hardware is supporting it...
Regards,
Martin
----- Original Message -----
From: "philips_apps" <philips_apps@...>
To: <lpc2000@yahoogroups.com>
Sent: Friday, November 18, 2005 12:12 AM
Subject: [lpc2000] Re: LPC214x crystal frequencies // ISP max baudrate 38.4
kBaud using 12 MHz> Confirmed > > 12 MHz -> max baudrate 38400 > 16 MHz -> max baudrate 19200 > 24 MHz -> max baudrate 38400 > > Robert > > --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote: >> >> Based on my calculations, 16MHz can only get to 19,200 (7% error > at >> 38,400) and 24MHz can get 38,400. If you went up to 48MHz crystal >> you could get 57,600. >> >> -- Sean >> >> --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> >> wrote: >> > >> > All, >> > >> > based on the algorithm the bootloader uses to determine the >> > baudrate, as Joel already found out, it is correct that the max >> > baudrate for 12 MHz is 38400 Baud. >> > >> > Will do some additional tests to determine the baudrates for 16 >> MHz >> > and 24 MHz but we assume that 12 MHz will be the most used > crystal >> > as it provides functionality for USB and enables the 60 MHz max. >> CPU >> > speed as well. >> > >> > Sorry for not providing the appropriate values in the table for >> the >> > ISP, will update with the next reloease of the Users Manual but >> that >> > might still take a little while. >> > >> > Robert >> > >> > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> > wrote: >> > > >> > > > To get the 48 MHz necessary for the LPC214x USB, you must > use >> a >> > crystal >> > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these > frequencies >> > are >> > > > mentioned in the manual table 291 that lists the possible > ISP >> > baud >> > > > rates with various crystal frequencies. Can you use serial >> ISP >> > with >> > > > 12/16/24 MHz, and with which baud rates? >> > > >> > > At 12MHz the highest the Phillips Flash utility will connect > is >> > 38.4k baud. >> > > I cannot connect running a higher baud. >> > > >> > > Joel >> > > >> > >> > > > > > > > > > Yahoo! Groups Links > > > > > > >
2005-11-18 by Karl Olsen
--- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> wrote: > > Confirmed > > 12 MHz -> max baudrate 38400 > 16 MHz -> max baudrate 19200 > 24 MHz -> max baudrate 38400 Thanks for checking. 12 MHz looks like the best frequency. Karl Olsen
2005-11-18 by philips_apps
Hi Martin, there are no immediate plans to use the fractional baudrate generator because we try to keep the number of different bootloaders limited. Also it is very difficult to use the fractional BR generator if the frequency of the oscillator is not known. Last but not least it is not possible to go 921 kbaud with 12 MHz because the max serial frequency with or without fractional baudrate generator is CPU clock divided by 16 and the bootloader does not change the PLL settings. Regards, Robert --- In lpc2000@yahoogroups.com, "Martin Maurer" <mailingliste@c...> wrote: > > Hi Robert, > > is there any plan to use the fractional baudrate generation in the booter, > so you can boot e.g. even at 921 kbit/s with a 12 MHz oscillator ? > Theoretically it should be possible, hardware is supporting it... > > Regards, > > Martin > > ----- Original Message ----- > From: "philips_apps" <philips_apps@y...> > To: <lpc2000@yahoogroups.com> > Sent: Friday, November 18, 2005 12:12 AM > Subject: [lpc2000] Re: LPC214x crystal frequencies // ISP max baudrate 38.4 > kBaud using 12 MHz > > > > Confirmed > > > > 12 MHz -> max baudrate 38400 > > 16 MHz -> max baudrate 19200 > > 24 MHz -> max baudrate 38400 > > > > Robert > > > > --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote: > >> > >> Based on my calculations, 16MHz can only get to 19,200 (7% error > > at > >> 38,400) and 24MHz can get 38,400. If you went up to 48MHz crystal > >> you could get 57,600. > >> > >> -- Sean > >> > >> --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> > >> wrote: > >> > > >> > All, > >> > > >> > based on the algorithm the bootloader uses to determine the > >> > baudrate, as Joel already found out, it is correct that the max > >> > baudrate for 12 MHz is 38400 Baud. > >> > > >> > Will do some additional tests to determine the baudrates for 16 > >> MHz > >> > and 24 MHz but we assume that 12 MHz will be the most used > > crystal > >> > as it provides functionality for USB and enables the 60 MHz max. > >> CPU > >> > speed as well. > >> > > >> > Sorry for not providing the appropriate values in the table for > >> the > >> > ISP, will update with the next reloease of the Users Manual but > >> that > >> > might still take a little while. > >> > > >> > Robert > >> > > >> > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> > > wrote: > >> > > > >> > > > To get the 48 MHz necessary for the LPC214x USB, you must > > use > >> a > >> > crystal > >> > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these > > frequencies > >> > are > >> > > > mentioned in the manual table 291 that lists the possible > > ISP > >> > baud > >> > > > rates with various crystal frequencies. Can you use serial
> >> ISP > >> > with > >> > > > 12/16/24 MHz, and with which baud rates? > >> > > > >> > > At 12MHz the highest the Phillips Flash utility will connect > > is > >> > 38.4k baud. > >> > > I cannot connect running a higher baud. > >> > > > >> > > Joel > >> > > > >> > > >> > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > >
2005-11-18 by seangra
Considering how we're dealing with flash sizes up to 512KB now, and loading that much data at 38.4kbps is significantly slower than 230kbps, are there any plans to fix this problem? Or better yet, consdering the speed, are there any plans to create a USB-based bootloader? Doesn't the SAM7S have this already? Additionally since there are some chips (FTDI comes to mind) that allow a WIDE range of baud rates, is it possible to use the current bootloader with a nonstandard baud rate? I.e. 12MHz can generate 187.5kbps with the same settings that 14.5796MHz uses to generate 230kbps. I know the FTDI chip can handle 187.5kbps. -- Sean --- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...> wrote: > > Hi Martin, > > there are no immediate plans to use the fractional baudrate > generator because we try to keep the number of different bootloaders > limited. Also it is very difficult to use the fractional BR > generator if the frequency of the oscillator is not known. > Last but not least it is not possible to go 921 kbaud with 12 MHz > because the max serial frequency with or without fractional baudrate > generator is CPU clock divided by 16 and the bootloader does not > change the PLL settings. > > Regards, Robert > > --- In lpc2000@yahoogroups.com, "Martin Maurer" <mailingliste@c...> > wrote: > > > > Hi Robert, > > > > is there any plan to use the fractional baudrate generation in the > booter, > > so you can boot e.g. even at 921 kbit/s with a 12 MHz oscillator ? > > Theoretically it should be possible, hardware is supporting it... > > > > Regards, > > > > Martin > > > > ----- Original Message ----- > > From: "philips_apps" <philips_apps@y...> > > To: <lpc2000@yahoogroups.com> > > Sent: Friday, November 18, 2005 12:12 AM > > Subject: [lpc2000] Re: LPC214x crystal frequencies // ISP max > baudrate 38.4 > > kBaud using 12 MHz > > > > > > > Confirmed > > > > > > 12 MHz -> max baudrate 38400 > > > 16 MHz -> max baudrate 19200 > > > 24 MHz -> max baudrate 38400 > > > > > > Robert > > > > > > --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote: > > >> > > >> Based on my calculations, 16MHz can only get to 19,200 (7% error > > > at > > >> 38,400) and 24MHz can get 38,400. If you went up to 48MHz > crystal > > >> you could get 57,600. > > >> > > >> -- Sean > > >> > > >> --- In lpc2000@yahoogroups.com, "philips_apps" > <philips_apps@y...> > > >> wrote: > > >> > > > >> > All, > > >> > > > >> > based on the algorithm the bootloader uses to determine the > > >> > baudrate, as Joel already found out, it is correct that the > max > > >> > baudrate for 12 MHz is 38400 Baud. > > >> > > > >> > Will do some additional tests to determine the baudrates for > 16 > > >> MHz > > >> > and 24 MHz but we assume that 12 MHz will be the most used > > > crystal > > >> > as it provides functionality for USB and enables the 60 MHz > max. > > >> CPU > > >> > speed as well. > > >> > > > >> > Sorry for not providing the appropriate values in the table > for > > >> the > > >> > ISP, will update with the next reloease of the Users Manual > but > > >> that > > >> > might still take a little while. > > >> > > > >> > Robert > > >> > > > >> > --- In lpc2000@yahoogroups.com, "Joel Winarske" <joelw@i...> > > > wrote: > > >> > > > > >> > > > To get the 48 MHz necessary for the LPC214x USB, you must > > > use > > >> a > > >> > crystal > > >> > > > of 12.0 MHz, 16.0 MHz, or 24.0 MHz. None of these > > > frequencies > > >> > are > > >> > > > mentioned in the manual table 291 that lists the possible > > > ISP > > >> > baud > > >> > > > rates with various crystal frequencies. Can you use > serial > > >> ISP > > >> > with > > >> > > > 12/16/24 MHz, and with which baud rates? > > >> > > > > >> > > At 12MHz the highest the Phillips Flash utility will connect
> > > is > > >> > 38.4k baud. > > >> > > I cannot connect running a higher baud. > > >> > > > > >> > > Joel > > >> > > > > >> > > > >> > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > >
2005-11-18 by Marko Pavlin (home)
Hello! Datasheet http://www.semiconductors.philips.com/acrobat_download/datasheets/LPC2141_42_44_46_48_1.pdf has <TBD> tag for active mode supply current. Has anyone measured this on LPC214x device? Are there any very low power ARM7 microcontrollers available (other than philips), or are those two words a paradox (low-power and ARM7)? Mare
2005-11-18 by slawcus
--- In lpc2000@yahoogroups.com, "Marko Pavlin (home)" <mp@h...> wrote: > > Hello! > > Datasheet > http://www.semiconductors.philips.com/acrobat_download/datasheets/LPC2141_42_44_46_48_1.pdf > has <TBD> tag for active mode supply current. Has anyone measured this > on LPC214x device? > > Are there any very low power ARM7 microcontrollers available (other than > philips), or are those two words a paradox (low-power and ARM7)? > > Mare > Define very low power. I just measured RTC consumption. It's same as LPC2138s. I don't like just two power saving modes, no additional cclk division, sub MHz PLL, etc. These are things that can help to reduce consumption in some applications.
2005-11-18 by Marko Pavlin (home)
> > > Define very low power. > "Ultralowpower" would be something in MSP430 range (not ARM core), or close to 1mA in active mode / sub-100uA in kinda active mode with fast wakeup (via some software /internal periphery interrupt). "Verylowpower" is, let's say 10 times higher than above. Mare