-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathTODO.txt
78 lines (47 loc) · 1.93 KB
/
TODO.txt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
Check again all FPGA control pins.
Check USB pinout.
Check SMA footprint against physical device.
74hct4094
zero ohm 0805
CAP 1uF 0603
*DIVIDER RESISTERS FOR 1.2v*
*22uF 0805*
* 20 pin headers *
* ADC + FPGA *
Triaged....
Provision CPU oscillator? - low priority, don't do it?
Activity LEDs on FT2232? - only on port b, not worth it? Worth doing anything
with spare port b pins?
Voltage monitors to CPU?
Trannie FP is wide - harmless, don't care.
Try and get more planes near adc?
Verified....
LQFP144 pads are 23 mm ext to ext, compared with 22mm device.
SSOP16 is 292mil ext to ext (7.4mm) - package 6.4.
QFN48 exposed pad is 5.6mm by 5.6mm, pads are 8mm ext to ext (device is 7mm by 7mm).
Validate solder 0603 side by side 50 mils apart - needs reflow, we can do it.
SOIC8 is 7.35mm (291mil) ext to ext - CHECK THIS - looks OK to me.
Check that oscillator does not have extra pins.
xtal - footprint v. symbol.
+ pads are oversized internally...
Verify soldering LLP LM3671 + inductor.
Inductor looks fine... LLP footprint?
Done...
Lengthen can cap pads. Leads end-end is 7.4mm, currently have 7.7mm on pads,
added .35mm each end to give 8.4mm.
Widen pads for push switch. 8mm end-end device, so we want 9mm.
We now have 1.4 by 1.6 pads instead of 1.2 by 1.4.
SC70 is 105mil ext to ext (2.65mm) - might be narrow, WIDEN
Device is 2.1, want 3.1
MSOP8 is 5.2mm ext to ext (205mil) - package 4.9 WIDEN
Want 5.9mm
LQFP64 pads are 12.8mm compared with 12mm device - widen by 0.1mm each side?
Pads for power input diode are too large.
Source termination in CS to flash?
Resistors on reset switches - suppress ringing.
More vias under cpu have cut up ground plane.
Clean-up ground planes around lm3671.
Solder points for a shield over the trannie.
Pad [rX1 rY1 rX2 rY2 Thickness Clearance Mask "name" "number" flags]
Element [SFlags "Desc" "Name" "Value" MX MY TX TY TDir TScale TSFlags]
Pin[rX rY Thickness Clearance Mask Drill "Name" "Number" SFlags]