| ??? 03/16/06 14:02 Modified: 03/16/06 14:08 Read: times |
#112305 - but what's going really on? Responding to: ???'s previous message |
Ian,
I believe this forum has an aggregate brainpower of several orders of magnitude higher than any FAE - except he might have access to insider information. However, you seem to answer your questions yourself already. Ian Bell said:
First, does it count up or down? Second, what happens if you load it with zero (reset value). Your item #3 below makes the question irrelevant, but I'd guess it's counting down. Counting down from zero means overfow ("underflow") on each cycle; hence zero is no divide at all, one is divide by two, N is divide by N+1. Of course it can be in any other way. But, if you are REALLY curious, why don't you sit down and try yourself? Third, I have found two errata which say this 10 bit prescaler does not work and the workaround is to always load it with zero. Well then, this invalidates all further questions, doesn't it? If it's buggy and the only workaround is "don't touch", then don't touch... Fourth, why does code architect always load it with zero no matter what values you feed into it? Basically I am confused. I expect a user manual to give me unambiguous instructions on how to operate a part. I can send you the datasheet (Rev. 04 — 06 January 2004, 300kB) and user manual (Rev.3 - 2003 Dec 8, 1.5MB) from my archive, but why do you expect it will be more clear about a buggy counter than the present datasheet/manual (LPC932A1's) is? Jan Waclawek PS. Oh yes, can anybody explain to me, why on earth are the manufacturers removing the datasheets of obsoleted products, as if denying they produced it at all...??? |
