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Hi folks, I've just built up my new target board (first one with a 56Fxxx) and am having no joy getting the crystal going - which is a bit depressing! I've got a 56F803, with an ACT crystal and 10M across the crystal, just as the manual suggests and the EVM has. The crystal is an HC49/U - datasheet can be found on the link below. http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html The voltages on the pins of the crytal sit at around 2.6V and Vcc (3.3V). I assume a blank device should still get the crystal oscillating? If not, I guess the problem could well be with the JTAG set up. With that sketchy amount of info, anyone got any suggestions? Cheers, Rob. |
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Crystal not working
Started by ●June 25, 2003
Reply by ●June 25, 20032003-06-25
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Hi Rob, We had some oscillator startup failures (although not at room temperature) on our 56F807 products, so we went to an external oscillator. This is described in the following messages I sent on September 5 and 6 of 2002: September 5, 2002, about 7:50am: "RE: [motoroladsp] 56F807 expected life cycle" September 6, 2002, about 6:53am: "RE: [motoroladsp] Application Note AN2049 vs. 56800/56800E User's Manuals" We never had an oscillator startup failure at room temperature, so your problem may be a bad chip or a bad crystal. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: dibosco [mailto:] Sent: Wednesday, June 25, 2003 2:02 PM To: Subject: [motoroladsp] Crystal not working Hi folks, I've just built up my new target board (first one with a 56Fxxx) and am having no joy getting the crystal going - which is a bit depressing! I've got a 56F803, with an ACT crystal and 10M across the crystal, just as the manual suggests and the EVM has. The crystal is an HC49/U - datasheet can be found on the link below. http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html The voltages on the pins of the crytal sit at around 2.6V and Vcc (3.3V). I assume a blank device should still get the crystal oscillating? If not, I guess the problem could well be with the JTAG set up. With that sketchy amount of info, anyone got any suggestions? Cheers, Rob. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
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Reply by ●June 25, 20032003-06-25
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Rob
-
I do not
know exactly how you have connected up the crystal, but we have a FAQ that might
be of interest.
FAQ-20214
Question:I am experiencing some crystal or resonator start up yield problems. Is their something you can recommend to resolve these issues ?Answer:The internal oscillator is designed to interface with a parallel-resonant crystal resonator in the frequency range specified for the external crystal in the data sheet. In the data sheet a recommended crystal oscillator circuit is shown. Follow the crystal supplier’s recommendations when selecting a crystal, because crystal parameters determine the component values required to provide maximum stability and reliable start-up. The crystal and associated components should be mounted as close as possible to the EXTAL and XTAL pins to minimize output distortion and start-up stabilization time. The internal 56F800 oscillator circuitry is designed to have no external load capacitors present. As shown in the data sheet no external load capacitors should be used. If your circuit has external load capacitors these will cause crystal start up problems. Removing these capacitors should resolve your crystal start up issuesIf your circuit does not have external load capacitors and you are still experiencing a small yield issue you can also try limiting the ESR of value of the crystal you have chosen. The ESR of the crystal can affect the over all gain of the circuit and hence the start up characteristics. Lowering the ESR provides greater gain. An example would be if your crystal manufacturer specifies a maximum of 70 ohms ESR you could request a screen of the parts supplied to you for a maximum of 60 ESR and test to see if this resolves your start up yield issue. Crystal start up is affected by many different board, manufacturing, and crystal parameters and the values for ESR in this FAQ should not be taken as a maximum or recommended value. Related ProductsDSP56F826DSP56F827 DSP56F801 DSP56F803 DSP56F805 DSP56F807
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Reply by ●June 26, 20032003-06-26
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Hi Rob, I have had problems with the crystal oscillator starting reliable also (at room temp). Out of 4 prototype boards I was testing 1 would start reliably, 1 would start randomly and 2 would not start at all. I did a lot of testing with various capacitors, resistors and different crystals with no good luck. I finally went with an external clock oscillator after reading Art's posts. All prototype and production boards have been working great since. Pete --- In , Hutchings William-p23437 <william.hutchings@m...> wrote: > Rob - > > I do not know exactly how you have connected up the crystal, but we have a FAQ that might be of interest. > > FAQ-20214 > Question: > > I am experiencing some crystal or resonator start up yield problems. Is their something you can recommend to resolve these issues ? > > answer > > Answer: > > The internal oscillator is designed to interface with a parallel- resonant crystal resonator in the frequency range specified for the external crystal in the data sheet. In the data sheet a recommended crystal oscillator circuit is shown. Follow the crystal supplier’s recommendations when selecting a crystal, because crystal parameters determine the component values required to provide maximum stability and reliable start-up. The crystal and associated components should be mounted as close as possible to the EXTAL and XTAL pins to minimize output distortion and start-up stabilization time. The internal 56F800 oscillator circuitry is designed to have no external load capacitors present. As shown in the data sheet no external load capacitors should be used. If your circuit has external load capacitors these will cause crystal start up problems. Removing these capacitors should resolve your crystal start up issues > > If your circuit does not have external load capacitors and you are still experiencing a small yield issue you can also try limiting the ESR of value of the crystal you have chosen. The ESR of the crystal can affect the over all gain of the circuit and hence the start up characteristics. Lowering the ESR provides greater gain. An example would be if your crystal manufacturer specifies a maximum of 70 ohms ESR you could request a screen of the parts supplied to you for a maximum of 60 ESR and test to see if this resolves your start up yield issue. Crystal start up is affected by many different board, manufacturing, and crystal parameters and the values for ESR in this FAQ should not be taken as a maximum or recommended value. > Related Products > > DSP56F826 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F826> > DSP56F827 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F827> > DSP56F801 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F801> > DSP56F803 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F803> > DSP56F805 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F805> > DSP56F807 <http://e- www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F807> > > > -----Original Message----- > From: Art Johnson [mailto:art@p...] > Sent: Wednesday, June 25, 2003 2:43 PM > To: dibosco; > Subject: RE: [motoroladsp] Crystal not working > Hi Rob, > > We had some oscillator startup failures (although not at room temperature) on our 56F807 products, so we went to an external oscillator. This is described in the following messages I sent on September 5 and 6 of 2002: > September 5, 2002, about 7:50am: > "RE: [motoroladsp] 56F807 expected life cycle" > September 6, 2002, about 6:53am: > "RE: [motoroladsp] Application Note AN2049 vs. 56800/56800E User's Manuals" > > We never had an oscillator startup failure at room temperature, so your problem may be a bad chip or a bad crystal. > > Regards, > > Art Johnson > Senior Systems Analyst > PMC Prime Mover Controls Inc. > 3600 Gilmore Way > Burnaby, B.C., Canada > V5G 4R8 > Phone: 604 433-4644 > FAX: 604 433-5570 > Email: art@p... > http://www.pmc-controls.com <http://www.pmc-controls.com > > -----Original Message----- > From: dibosco [mailto:Robert.Wood@a...] > Sent: Wednesday, June 25, 2003 2:02 PM > To: > Subject: [motoroladsp] Crystal not working > Hi folks, > > I've just built up my new target board (first one with a 56Fxxx) and > am having no joy getting the crystal going - which is a bit depressing! > > I've got a 56F803, with an ACT crystal and 10M across the crystal, > just as the manual suggests and the EVM has. > > The crystal is an HC49/U - datasheet can be found on the link below. > > http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html <http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html> > > The voltages on the pins of the crytal sit at around 2.6V and Vcc (3.3V). > > I assume a blank device should still get the crystal oscillating? If > not, I guess the problem could well be with the JTAG set up. > > With that sketchy amount of info, anyone got any suggestions? > > Cheers, > > Rob. > > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/motoroladsp <http://www.yahoogroups.com/group/motoroladsp> > > More Groups: http://www.dsprelated.com/groups.php3 <http://www.dsprelated.com/groups.php3> > > > ">http://docs.yahoo.com/info/terms/ <http://docs.yahoo.com/info/terms/> > Yahoo! Groups Sponsor > <http://rd.yahoo.com/M%1812.3170658.4537139.1261774/D=egroupweb/S 05771855:HM/A64415/R=0/SIGt6t7kdo/*http://www.netflix.com/Defaul t?mqso`164784&partid170658> > <http://us.adserver.yahoo.com/l? M%1812.3170658.4537139.1261774/D=egroupmail/S=:HM/A64415/rand5 759729> > > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/motoroladsp <http://www.yahoogroups.com/group/motoroladsp> > > More Groups: http://www.dsprelated.com/groups.php3 <http://www.dsprelated.com/groups.php3> > > > ">http://docs.yahoo.com/info/terms/> . |
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Reply by ●June 27, 20032003-06-27
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Please be aware that leg capacitors - most MCU manufactures suggest 22pf-33pf - can kill crystal. Motorola does not recommend leg caps for its DSP56F80x devices. Charlie W --- Pete Becher <> wrote: > Hi Rob, > > I have had problems with the crystal oscillator > starting reliable > also (at room temp). Out of 4 prototype boards I > was testing 1 would > start reliably, 1 would start randomly and 2 would > not start at all. > I did a lot of testing with various capacitors, > resistors and > different crystals with no good luck. I finally > went with an > external clock oscillator after reading Art's posts. > All prototype > and production boards have been working great since. > > Pete > > --- In , Hutchings > William-p23437 > <william.hutchings@m...> wrote: > > Rob - > > > > I do not know exactly how you have connected up > the crystal, but we > have a FAQ that might be of interest. > > > > FAQ-20214 > > > > > > Question: > > > > I am experiencing some crystal or resonator start > up yield > problems. Is their something you can recommend to > resolve these > issues ? > > > > answer > > > > Answer: > > > > The internal oscillator is designed to interface > with a parallel- > resonant crystal resonator in the frequency range > specified for the > external crystal in the data sheet. In the data > sheet a recommended > crystal oscillator circuit is shown. Follow the > crystal > suppliers recommendations when selecting a > crystal, because > crystal parameters determine the component values > required to provide > maximum stability and reliable start-up. The crystal > and associated > components should be mounted as close as possible to > the EXTAL and > XTAL pins to minimize output distortion and start-up > stabilization > time. The internal 56F800 oscillator circuitry is > designed to have no > external load capacitors present. As shown in the > data sheet no > external load capacitors should be used. If your > circuit has external > load capacitors these will cause crystal start up > problems. Removing > these capacitors should resolve your crystal start > up issues > > > > If your circuit does not have external load > capacitors and you are > still experiencing a small yield issue you can also > try limiting the > ESR of value of the crystal you have chosen. The ESR > of the crystal > can affect the over all gain of the circuit and > hence the start up > characteristics. Lowering the ESR provides greater > gain. An example > would be if your crystal manufacturer specifies a > maximum of 70 ohms > ESR you could request a screen of the parts supplied > to you for a > maximum of 60 ESR and test to see if this resolves > your start up > yield issue. Crystal start up is affected by many > different board, > manufacturing, and crystal parameters and the values > for ESR in this > FAQ should not be taken as a maximum or recommended > value. > > > > > > > > Related Products > > > > DSP56F826 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F826> > > > DSP56F827 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F827> > > > DSP56F801 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F801> > > > DSP56F803 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F803> > > > DSP56F805 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F805> > > > DSP56F807 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F807> > > > > > > > -----Original Message----- > > From: Art Johnson [mailto:art@p...] > > Sent: Wednesday, June 25, 2003 2:43 PM > > To: dibosco; > > Subject: RE: [motoroladsp] Crystal not working > > > > > > Hi Rob, > > > > We had some oscillator startup failures (although > not at room > temperature) on our 56F807 products, so we went to > an external > oscillator. This is described in the following > messages I sent on > September 5 and 6 of 2002: > > September 5, 2002, about 7:50am: > > "RE: [motoroladsp] 56F807 expected life cycle" > > September 6, 2002, about 6:53am: > > "RE: [motoroladsp] Application Note AN2049 vs. > 56800/56800E > User's Manuals" > > > > We never had an oscillator startup failure at room > temperature, so > your problem may be a bad chip or a bad crystal. > > > > Regards, > > > > Art Johnson > > Senior Systems Analyst > > PMC Prime Mover Controls Inc. > > 3600 Gilmore Way > > Burnaby, B.C., Canada > > V5G 4R8 > > Phone: 604 433-4644 > > FAX: 604 433-5570 > > Email: art@p... > > http://www.pmc-controls.com > <http://www.pmc-controls.com> > > > > > > > > -----Original Message----- > > From: dibosco [mailto:Robert.Wood@a...] > > Sent: Wednesday, June 25, 2003 2:02 PM > > To: > > Subject: [motoroladsp] Crystal not working > > > > > > Hi folks, > > > > I've just built up my new target board (first one > with a 56Fxxx) and > > am having no joy getting the crystal going - which > is a bit > depressing! > > > > I've got a 56F803, with an ACT crystal and 10M > across the crystal, > > just as the manual suggests and the EVM has. > > > > The crystal is an HC49/U - datasheet can be found > on the link below. > > > > > http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html > > <http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html> > > > > > The voltages on the pins of the crytal sit at > around 2.6V and Vcc > (3.3V). > > > > I assume a blank device should still get the > crystal oscillating? If > > not, I guess the problem could well be with the > JTAG set up. > > > > With that sketchy amount of info, anyone got any > suggestions? > > > > Cheers, > > > > Rob. > > > > > > > > _____________________________________ > > Note: If you do a simple "reply" with your email > client, only the > author of this message will receive your answer. > You need to do > a "reply all" if you want your answer to be > distributed to the entire > group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: > > > > To Post: > > > > To Leave: > > > > Archives: > http://www.yahoogroups.com/group/motoroladsp > <http://www.yahoogroups.com/group/motoroladsp> > > > > More Groups: http://www.dsprelated.com/groups.php3 > > <http://www.dsprelated.com/groups.php3> > > > > > > ">http://docs.yahoo.com/info/terms/ > <http://docs.yahoo.com/info/terms/> > > > > > > > > > > > > > > Yahoo! Groups Sponsor > > > <http://rd.yahoo.com/M%1812.3170658.4537139.1261774/D=egroupweb/S > 05771855:HM/A64415/R=0/SIGt6t7kdo/*http://www.netflix.com/Defaul > t?mqso`164784&partid170658> > > <http://us.adserver.yahoo.com/l? > M%1812.3170658.4537139.1261774/D=egroupmail/S=:HM/A64415/rand5 > 759729> > > > > _____________________________________ > > Note: If you do a simple "reply" with your email > client, only the > author of this message will receive your answer. > You need to do > a "reply all" if you want your answer to be > distributed to the entire > group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: > > > > To Post: > > > > To Leave: > > > > Archives: > http://www.yahoogroups.com/group/motoroladsp > <http://www.yahoogroups.com/group/motoroladsp> > > > > More Groups: http://www.dsprelated.com/groups.php3 > > <http://www.dsprelated.com/groups.php3> > > > > > > ">http://docs.yahoo.com/info/terms/> . __________________________________ |
Reply by ●June 27, 20032003-06-27
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Yes, the first thing we tried was exactly the "recommended"
circuit (Figure 15-1), with no capacitors. Extreme care was taken in the PCB layout (shortest possible traces, good 4-layer board, etc.). It failed miserably. We tried crystals with different characteristics, without success. We tried everything in FAQ-20214, without success. We spent weeks of effort to try to get the on-chip oscillator to start up reliably at low temperatures, without success. We tried all possible combinations in the oscillator circuit, with 0, 1, or 2 capacitors of various values (10pF to 47pF) to ground (at EXTAL and/or XTAL), different feedback resistor values from 1M to 22M ohms, and with or without the series resistor (Rs in Motorola Application Note AN2049). None of these circuits started up reliably at low temperatures, so we reluctantly decided (as strongly recommended in Motorola Application Note AN2049) that the only solution was to use a separate oscillator circuit that was guaranteed to start up at low temperatures. That solved all of our problems. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: Charlie W [mailto:] Sent: Thursday, June 26, 2003 5:50 PM To: Pete Becher; Subject: Re: [motoroladsp] Re: Crystal not working Please be aware that leg capacitors - most MCU manufactures suggest 22pf-33pf - can kill crystal. Motorola does not recommend leg caps for its DSP56F80x devices. Charlie W --- Pete Becher <> wrote: > Hi Rob, > > I have had problems with the crystal oscillator > starting reliable > also (at room temp). Out of 4 prototype boards I > was testing 1 would > start reliably, 1 would start randomly and 2 would > not start at all. > I did a lot of testing with various capacitors, > resistors and > different crystals with no good luck. I finally > went with an > external clock oscillator after reading Art's posts. > All prototype > and production boards have been working great since. > > Pete > > --- In , Hutchings > William-p23437 > <william.hutchings@m...> wrote: > > Rob - > > > > I do not know exactly how you have connected up > the crystal, but we > have a FAQ that might be of interest. > > > > FAQ-20214 > > > > > > Question: > > > > I am experiencing some crystal or resonator start > up yield > problems. Is their something you can recommend to > resolve these > issues ? > > > > answer > > > > Answer: > > > > The internal oscillator is designed to interface > with a parallel- > resonant crystal resonator in the frequency range > specified for the > external crystal in the data sheet. In the data > sheet a recommended > crystal oscillator circuit is shown. Follow the > crystal > supplier's recommendations when selecting a > crystal, because > crystal parameters determine the component values > required to provide > maximum stability and reliable start-up. The crystal > and associated > components should be mounted as close as possible to > the EXTAL and > XTAL pins to minimize output distortion and start-up > stabilization > time. The internal 56F800 oscillator circuitry is > designed to have no > external load capacitors present. As shown in the > data sheet no > external load capacitors should be used. If your > circuit has external > load capacitors these will cause crystal start up > problems. Removing > these capacitors should resolve your crystal start > up issues > > > > If your circuit does not have external load > capacitors and you are > still experiencing a small yield issue you can also > try limiting the > ESR of value of the crystal you have chosen. The ESR > of the crystal > can affect the over all gain of the circuit and > hence the start up > characteristics. Lowering the ESR provides greater > gain. An example > would be if your crystal manufacturer specifies a > maximum of 70 ohms > ESR you could request a screen of the parts supplied > to you for a > maximum of 60 ESR and test to see if this resolves > your start up > yield issue. Crystal start up is affected by many > different board, > manufacturing, and crystal parameters and the values > for ESR in this > FAQ should not be taken as a maximum or recommended > value. > > > > > > > > Related Products > > > > DSP56F826 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F826> > > > DSP56F827 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F827> > > > DSP56F801 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F801> > > > DSP56F803 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F803> > > > DSP56F805 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F805> > > > DSP56F807 <http://e- > www.motorola.com/webapp/sps/site/prod_summary.jsp?code=DSP56F807> > > > > > > > -----Original Message----- > > From: Art Johnson [mailto:art@p...] > > Sent: Wednesday, June 25, 2003 2:43 PM > > To: dibosco; > > Subject: RE: [motoroladsp] Crystal not working > > > > > > Hi Rob, > > > > We had some oscillator startup failures (although > not at room > temperature) on our 56F807 products, so we went to > an external > oscillator. This is described in the following > messages I sent on > September 5 and 6 of 2002: > > September 5, 2002, about 7:50am: > > "RE: [motoroladsp] 56F807 expected life cycle" > > September 6, 2002, about 6:53am: > > "RE: [motoroladsp] Application Note AN2049 vs. > 56800/56800E > User's Manuals" > > > > We never had an oscillator startup failure at room > temperature, so > your problem may be a bad chip or a bad crystal. > > > > Regards, > > > > Art Johnson > > Senior Systems Analyst > > PMC Prime Mover Controls Inc. > > 3600 Gilmore Way > > Burnaby, B.C., Canada > > V5G 4R8 > > Phone: 604 433-4644 > > FAX: 604 433-5570 > > Email: art@p... > > http://www.pmc-controls.com > <http://www.pmc-controls.com> > > > > > > > > -----Original Message----- > > From: dibosco [mailto:Robert.Wood@a...] > > Sent: Wednesday, June 25, 2003 2:02 PM > > To: > > Subject: [motoroladsp] Crystal not working > > > > > > Hi folks, > > > > I've just built up my new target board (first one > with a 56Fxxx) and > > am having no joy getting the crystal going - which > is a bit > depressing! > > > > I've got a 56F803, with an ACT crystal and 10M > across the crystal, > > just as the manual suggests and the EVM has. > > > > The crystal is an HC49/U - datasheet can be found > on the link below. > > > > > http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html > > <http://www.act.co.uk/products/crystals/PTH_Crystals/actHC49_U.html> > > > > > The voltages on the pins of the crytal sit at > around 2.6V and Vcc > (3.3V). > > > > I assume a blank device should still get the > crystal oscillating? If > > not, I guess the problem could well be with the > JTAG set up. > > > > With that sketchy amount of info, anyone got any > suggestions? > > > > Cheers, > > > > Rob. > > > > > > > > _____________________________________ > > Note: If you do a simple "reply" with your email > client, only the > author of this message will receive your answer. > You need to do > a "reply all" if you want your answer to be > distributed to the entire > group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: > > > > To Post: > > > > To Leave: > > > > Archives: > http://www.yahoogroups.com/group/motoroladsp > <http://www.yahoogroups.com/group/motoroladsp> > > > > More Groups: http://www.dsprelated.com/groups.php3 > > <http://www.dsprelated.com/groups.php3> > > > > > > ">http://docs.yahoo.com/info/terms/ > <http://docs.yahoo.com/info/terms/> > > > > > > > > > > > > > > Yahoo! Groups Sponsor > > > <http://rd.yahoo.com/M%1812.3170658.4537139.1261774/D=egroupweb/S > 05771855:HM/A64415/R=0/SIGt6t7kdo/*http://www.netflix.com/Defaul > t?mqso`164784&partid170658> > > <http://us.adserver.yahoo.com/l? > M%1812.3170658.4537139.1261774/D=egroupmail/S=:HM/A64415/rand5 > 759729> > > > > _____________________________________ > > Note: If you do a simple "reply" with your email > client, only the > author of this message will receive your answer. > You need to do > a "reply all" if you want your answer to be > distributed to the entire > group. > > > > _____________________________________ > > About this discussion group: > > > > To Join: > > > > To Post: > > > > To Leave: > > > > Archives: > http://www.yahoogroups.com/group/motoroladsp > <http://www.yahoogroups.com/group/motoroladsp> > > > > More Groups: http://www.dsprelated.com/groups.php3 > > <http://www.dsprelated.com/groups.php3> > > > > > > ">http://docs.yahoo.com/info/terms/> . __________________________________ _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
Reply by ●June 30, 20032003-06-30
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Many thanks to everyone who kindly helped with this issue. What finally got
it working was reading what someone else posted recently about the oscillator not working without the analogue voltage also being applied. Guess who hadn't connected analogue 3V3 to his board? ;-) Thanks again to everyone for their suggestions, it's greatly appreciated. Cheers, Rob. |
