Am thinking of trying to output from output 7 on the picaxe 18x chip to make it an input to a 8M chip. Whats the best way? Would they share the same power supply? Would I be best to write the 08m program onto a chip then insert into chipholder thats connected to the 18x chip? Any help appreciated.
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18x chip connected to 8M chip
- Thread starter G.Minogue
- Start date
BeanieBots
Moderator
If both chips run from the same power supply and you use input 3 on the 08M, then all you need to do is connect them together.
If they use different supplies or you use any input other than 3, then it would be a very good idea to fit a current limiting resistor between the output of the 18X and the input of the 08M.
This is to protect the chips from excessive currents on their outputs. If for example your 08M had a program error which turned the input into an output, it would 'fight to the death' with the 18X to control the logic level of the line.
How the two would actually 'talk' to each other is up to you but have a read about serout and serin commands.
Not too sure what you are asking about with regard to the "programming and putting in a socket" part of your question.
If they use different supplies or you use any input other than 3, then it would be a very good idea to fit a current limiting resistor between the output of the 18X and the input of the 08M.
This is to protect the chips from excessive currents on their outputs. If for example your 08M had a program error which turned the input into an output, it would 'fight to the death' with the 18X to control the logic level of the line.
How the two would actually 'talk' to each other is up to you but have a read about serout and serin commands.
Not too sure what you are asking about with regard to the "programming and putting in a socket" part of your question.
BeanieBots
Moderator
You could do that but the circuitry required to enable "in circuit programming" is only 2 resistors and some form of connection, so why not just design it into your own board?
I use a strip of 3 SIL pins (they come in lengths of 100 for a few pence) and a Futaba or Hitec style RC Servo connector for programming. Uses very little board space and very cheap.
I use a strip of 3 SIL pins (they come in lengths of 100 for a few pence) and a Futaba or Hitec style RC Servo connector for programming. Uses very little board space and very cheap.