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New STM8 Microcontroller from STMicroelectronics is ST7 Upgrade

Started by Bill Giovino February 27, 2008
STMicroelectronics has introduced the STM8 8-bit low power microcontroller.

http://microcontroller.com/news/STM8.asp

It is software compatible with ST's ST7 and offers better than 10x the performance.

It can run at anywhere from 1.6V to 5.0V supply current.

Bill Giovino
Executive Editor
http://Microcontroller.com



Bill Giovino wrote:
> STMicroelectronics has introduced the STM8 8-bit low power microcontroller. > > http://microcontroller.com/news/STM8.asp > > It is software compatible with ST's ST7 and offers better than 10x the performance. > > It can run at anywhere from 1.6V to 5.0V supply current.
??! - you may like to re-read the press release, and data sheets more carefully. (and 5V is a voltage, not a 'supply current') :) -jg
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"Jim Granville" wrote...
> > Bill Giovino wrote: > > STMicroelectronics has introduced the STM8 8-bit low power =
microcontroller.
> >=20 > > http://microcontroller.com/news/STM8.asp > >=20 > > It is software compatible with ST's ST7 and offers better than 10x =
the performance.
> >=20 > > It can run at anywhere from 1.6V to 5.0V supply current voltage. >=20 > ??! - you may like to re-read the press release, and data sheets more=20 > carefully. (and 5V is a voltage, not a 'supply current')
OUCH!!!!!! That was a partial cut/paste, that sentence originally said "It can draw = only an 11mA supply current at 24MHz" (hits self on side of head and skulks off in disbelief) Thanks, Jim (he writes sheepishly) -Bill. ------=_NextPart_000_000C_01C8797F.C22A51E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1607" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>"Jim Granville"&nbsp;</FONT><FONT = face=3DArial=20 size=3D2>wrote</FONT><FONT face=3DArial size=3D2>...</FONT></DIV> <DIV><FONT face=3DArial size=3D2>&gt;</FONT></DIV> <DIV><FONT face=3DArial size=3D2>&gt; Bill Giovino wrote:<BR>&gt; &gt;=20 STMicroelectronics has introduced the STM8 8-bit low power=20 microcontroller.<BR>&gt; &gt; <BR>&gt; &gt; </FONT><A=20 href=3D"http://microcontroller.com/news/STM8.asp"><FONT face=3DArial=20 size=3D2>http://microcontroller.com/news/STM8.asp</FONT></A><BR><FONT = face=3DArial=20 size=3D2>&gt; &gt; <BR>&gt; &gt; It is software compatible with ST's ST7 = and=20 offers better than 10x the performance.<BR>&gt; &gt; <BR>&gt; &gt; It = can run at=20 anywhere from 1.6V to 5.0V supply <STRIKE>current</STRIKE> = voltage.<BR>&gt;=20 <BR>&gt; ??! - you may like to re-read the press release, and data = sheets more=20 <BR>&gt; carefully. (and 5V is a voltage, not a 'supply=20 current')<BR></FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3DArial size=3D2>OUCH!!!!!!</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3DArial size=3D2>That was a partial cut/paste, that = sentence=20 originally said "It can&nbsp;draw only an&nbsp;<EM>11mA supply current = at=20 24MHz</EM>"</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3DArial size=3D2>(hits self on side of head and skulks = off in=20 disbelief)</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3DArial size=3D2>Thanks, Jim (he writes = sheepishly)</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV> <DIV><FONT face=3DArial size=3D2>-Bill.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV></BODY></HTML> ------=_NextPart_000_000C_01C8797F.C22A51E0--
Bill Giovino wrote:
> > Part 1.1 Type: Plain Text (text/plain) > Encoding: quoted-printable
Please do not post HTML to Usenet. Pure plain unadorned text is used. Some systems can be destroyed by reading evil HTML. -- [mail]: Chuck F (cbfalconer at maineline dot net) [page]: <http://cbfalconer.home.att.net> Try the download section. -- Posted via a free Usenet account from http://www.teranews.com
"Bill Giovino" <contact01@microcontroller.com> skrev i meddelandet 
news:yfednY7e_P2qM1janZ2dnUVZ_ournZ2d@comcast.com...
> STMicroelectronics has introduced the STM8 8-bit low power > microcontroller. > > http://microcontroller.com/news/STM8.asp > > It is software compatible with ST's ST7 and offers better than 10x the > performance. > > It can run at anywhere from 1.6V to 5.0V supply current. > > Bill Giovino > Executive Editor > http://Microcontroller.com > >
Apparently it has quite high power consumption compared to let's say an ARM7TDMI core 1.2 mW/MHz @ 3V vs 0.21 mW/MHz for ARM. Uses up to 25 uA in sleep. -- Best Regards, Ulf Samuelsson This is intended to be my personal opinion which may, or may not be shared by my employer Atmel Nordic AB
"Ulf Samuelsson" <ulf@a-t-m-e-l.com> writes:
> Apparently it has quite high power consumption compared to > let's say an ARM7TDMI core 1.2 mW/MHz @ 3V vs 0.21 mW/MHz > for ARM. Uses up to 25 uA in sleep.
Now I know why my old-time power professor always referred to electronic "sneak currents"! In his field, he lost more current than that around the HV transmission line insulators.
Ulf Samuelsson wrote:
> Apparently it has quite high power consumption compared to let's say an > ARM7TDMI core 1.2 mW/MHz @ 3V vs 0.21 mW/MHz for ARM. > Uses up to 25 uA in sleep.
Hard to find an ARM microcontroller (or comparable performance non-ARM) that draws much less than 25 uA in sleep. Even most of the Atmel AT91SAM7x parts seem to draw around that much, according to the data sheets. For instance, AT91SAM7S family typical is 34.3 uA (Atmel document 6175H dated 03-Dec-07, page 553).
"Eric Smith" <eric@brouhaha.com> skrev i meddelandet 
news:m3hcfsan13.fsf@donnybrook.brouhaha.com...
> Ulf Samuelsson wrote: >> Apparently it has quite high power consumption compared to let's say an >> ARM7TDMI core 1.2 mW/MHz @ 3V vs 0.21 mW/MHz for ARM. >> Uses up to 25 uA in sleep. > > Hard to find an ARM microcontroller (or comparable performance non-ARM) > that draws much less than 25 uA in sleep. Even most of the Atmel > AT91SAM7x > parts seem to draw around that much, according to the data sheets. > For instance, AT91SAM7S family typical is 34.3 uA (Atmel document 6175H > dated > 03-Dec-07, page 553).
And most of that 34 uA is coming from the on-chip regulator. The core uses 4 uA (current measured over AMP2). You can disable the internal LDO and use an external LDO which would have an inherent power consumption of about 1 uA. This would of course cost extra, and use more space. You can also look at the new 1.8V AT91SAM7L :-) The 25 uA, should however be compared to similar 8/16 bit micros The X-Mega uses 1-2 uA in sleep with Brownout&RTC. -- Best Regards, Ulf Samuelsson This is intended to be my personal opinion which may, or may not be shared by my employer Atmel Nordic AB