Mark_R
Member
Hi,
I have 2 PICs (18F4620 & 16F684) and would like to share 1 reset button. I think my scheme will work, but was looking for opinions. See attached...
Explanation:
J10 is the programming port, the left is to program µC A, the right is for µC B.
For normal run, pins1&2 would be shorted to allow the reset and pullup to be shared.
J11/J13 are solder jumpers to provide power to their respective PICs that would be shorted for normal run, open to program using power from the programmer. J12/J14 are 2 pin headers with the same purpose, only populated for development work.
My concerns:
Thanks.
I have 2 PICs (18F4620 & 16F684) and would like to share 1 reset button. I think my scheme will work, but was looking for opinions. See attached...
Explanation:
J10 is the programming port, the left is to program µC A, the right is for µC B.
For normal run, pins1&2 would be shorted to allow the reset and pullup to be shared.
J11/J13 are solder jumpers to provide power to their respective PICs that would be shorted for normal run, open to program using power from the programmer. J12/J14 are 2 pin headers with the same purpose, only populated for development work.
My concerns:
- OK to have both µC share one reset circuit with both MCLRs tied together?
- During programming, µC A would not have the benefit of the 10K pullup on MCLR as the jumper on J10 1&2 would be removed. Is it needed?
Thanks.
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