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/*
* Example of a QFN package (and general construction site to experiment with
* fped features during development)
*
* Everything you see here is likely to change sooner or later.
*
* http://www.nxp.com/acrobat/packages/footprint/SOT616-1_fp_reflow.pdf
*/
frame pad_up {
c: vec @(-D/2, 0mm)
o: vec c(D, C)
set pad = n+1
pad "$pad" c .
}
frame pads {
loop n = 0, N/4-1
vec @(P*(n-(N/4-1)/2), -Ay/2)
frame pad_up .
}
part "qfn"
set N = 24
/*
* Note that this table is not a great example because it contains lots of
* fields we don't really need for iterations. But it's useful for driving
* the GUI to extremes.
*/
table
{ P, Ax, Ay, Bx, By, C, D, SLx, SLy, SPx_tot, SPy_tot, SPx, SPy, Gx, Gy, Hx, Hy }
{ 0.5mm, 5mm, 5mm, 3.2mm, 3.2mm, 0.9mm, 0.24mm, 2.1mm, 2.1mm, 1.2mm,
1.2mm, 0.45mm, 0.45mm, 4.3mm, 4.3mm, 5.25mm, 5.25mm }
h_x0y0: vec @(-Hx/2, -Hy/2)
h_x1y1: vec .(Hx, Hy)
rect h_x0y0 h_x1y1 8mil
/*
* we can't draw the package outline on the silk screen for it would print
* over the pads.
*/
#if 0
g_x0y0: vec @(-Gx/2, -Gy/2)
g_x1y1: vec .(Gx, Gy)
#endif
frame pads @
// ARC, just for testing
c: vec @(-1mm, 1mm)
r: vec c(0mm, 0.5mm)
e: vec c(-0.5mm, 0mm)
arc c r e 2mil
r2: vec c(0mm, 0.8mm)
circ c r2 5mil
/*
x1 = 1+2*3
x2 = (1+2)*3
x3 = 1-(2+3)
*/
measy pad_up.c -> pad_up.o 0.2mm
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