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86e556ce92
- atusd/ERRATA: variations of the circuit being debugged from the design - tools/Makefile, tools/try.c, tools/lib/atusd.c: user-space tool to enable the board and (in the future) establish communication - atusd/sim/clk.sch: simulation of CLK attenuation circuit with capacitative load from scope probe
6 lines
291 B
Plaintext
6 lines
291 B
Plaintext
- changed C7 to 1 nF to debug a signal attenuation problem. Turned out to be
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a bad trace. According to simulations, 22 pF should be more than enough.
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- added wire connecting uSD-side ground plane to ground plane at outer edge,
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to improve CLK signal return. (Probably unnecessary, too.)
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