2022-02-01 15:07:02 +00:00
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* DO NOT USE U300; BAD PIN POLARITY USED! (also true for <=rev3.1!!)
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* rev2.0->rev2.1 rework needed:
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* connect U400.6 to U400.7
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* cut connection from U401.10 (to U500.1,R403; but cut close to U401)
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* connect U400.5 to U401.10
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* connect U400.7 to U500.1 ('Vdclo')
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* if U400 not used: connect U400.5 to U400.7
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* to update rev2.0 -> rev3.x components:
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* R1,2 -> R500,R405 (reuse component, new part assignment)
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* new: R40{4,3,2}: 47k 0805
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* new: R401: 47k OR 0Ohm; 0805
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* new: R1,R2: 220k 0805
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* new: C401: OPTIONAL 10uF 0603
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* if >=rev3.2: D30{2,3,4,5} is now SOD-123F footprint, not SOD-323
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2022-02-03 01:27:50 +00:00
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* 3.3 extras:
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* R501 pullup added, kinda needed
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* extra C500, C402 decoupling caps (10nF, 100nF), probably not needed
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* less bottom plane fills around the SMPS
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* still no ESD prot, oh well, PicoEMP doesn't either
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