| ??? 05/05/05 07:44 Read: times |
#92967 - fittness for purpose Responding to: ???'s previous message |
Geert Vancompernolle said: Geert, please note, it's a development board. As you will see, they also directly output the port pins to the 'outside world'.
http://www.pjrc.com/tech/8051...matic.html http://www.pjrc.com/tech/8051/board5/schematic.html said:
This schematic is provided [...] without any warranty [...] of fitness for a particular purpose. So what is your "particular purpose"? If it's for playing (that's what devboards are really for), use basically what you have. If it's going to be inside a box, this can be enough (unless there's something really naughty in the same box). If it is going outside to the real word and it's commercial, it's not worth to spare a couple of parts if there is the slightest risk that you (anybody) will need to go out and repair - especially in Western Europe (and/or USA). Jan Waclawek PS. For "no particular purpose" I would use pullups on each port pin and 100Ω/100pF low-pass (viewed from the "outside world") RC filter (so that the C is at the '51 pin). |
