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43 lines
1.0 KiB
43 lines
1.0 KiB
6 years ago
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# Minimal required parts
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When manually assembling boards, it is good to know
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the minimal parts list that has to be assembled for the
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board to respond and be programmed.
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FPGA
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U1
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Switching power supplies:
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C1,U3,L1,C2,RA1,RB1,C3,C4,C22,C17
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C9,U4,L2,C10,RA2,RB2,C11,C12,C23,C19
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C5,U5,L3,C6,RA3,RB3,C7,C8,C24,C20
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Power-up and hold circuit:
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US1 - USB connector
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D8 - US1 power routing diode
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R10,D12 - USB power up
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D16,R3,B0 - BTN0 power up
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R6,Q1,D13,D10,R1 - power up transistor
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D11,R4,R2 - power hold
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FPGA decoupling capacitors, board could probably
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work without them:
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C17,C19,C20,C25,C26,C31,C32,C27,C28,C29,C30
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USB-serial to program FPGA over USB. FPGA can also
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be programmed without USB-serial chip using J4 JTAG header
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and external JTAG programmer:
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R49,R50,R9,U6
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Clock 25MHz to properly clock examples.
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FPGA will respond with JTAG ID and can be
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programmed even work for combinatorial-only
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examples (no registers) without this clock.
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Y1
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