2 # Copyright 2007 by Bdale Garbee <bdale@gag.com>. GPLv2
4 # Program to emit PCB footprint for QFN36 package used by TI CC1111
7 # dimensions in mm from the TI cc1111f32.pdf datasheet
17 # we're going to use the 1/100 of a mil fundamental unit form
19 return int( mm / 25.4 * 1000.0 * 100.0 + 0.5 )
21 print 'Element[0x0 "QFN36" "" "" 0 0 0 0 0 100 0x0]'
24 # pad under the chip, must be grounded
25 # making the solder mask opening the recommended size, and the actual copper
26 # pad 6 mils smaller ... hoping this helps us avoid signal pad shorts!
32 mm2mils100(CoreSquare)-600, \
34 mm2mils100(CoreSquare), \
35 '"pin37" "37" 0x0100]'
37 # vias in the ground pad under the chip
38 for via in range (-1,2):
40 mm2mils100(-CoreSquare / 3), \
41 mm2mils100(via * CoreSquare / 3), \
46 '"pin37" "37" 0x0002]'
49 mm2mils100(via * CoreSquare / 3), \
54 '"pin37" "37" 0x0002]'
56 mm2mils100(CoreSquare / 3), \
57 mm2mils100(via * CoreSquare / 3), \
62 '"pin37" "37" 0x0002]'
65 for pin in range (1,10):
67 mm2mils100(-2.5 + pin * PinSpacing), \
68 mm2mils100(-Overall/2 + PinWidth/2), \
69 mm2mils100(-2.5 + pin * PinSpacing), \
70 mm2mils100(-Overall/2 + PinHeight - PinWidth/2), \
71 mm2mils100(PinWidth), \
72 mm2mils100(PinSpacing - PinWidth), \
73 mm2mils100(PinWidth)+600, \
74 '"pin%i"' % (28-pin), '"%i"' % (28-pin), '0x0000]'
77 mm2mils100(-2.5 + pin * PinSpacing), \
78 mm2mils100(+Overall/2 - PinHeight + PinWidth/2), \
79 mm2mils100(-2.5 + pin * PinSpacing), \
80 mm2mils100(+Overall/2 - PinWidth/2), \
81 mm2mils100(PinWidth), \
82 mm2mils100(PinSpacing - PinWidth), \
83 mm2mils100(PinWidth)+600, \
84 '"pin%i"' % pin, '"%i"' % pin, '0x0000]'
87 mm2mils100(Overall/2 - PinHeight + PinWidth/2), \
88 mm2mils100(-2.5 + pin * PinSpacing), \
89 mm2mils100(Overall/2 - PinWidth/2), \
90 mm2mils100(-2.5 + pin * PinSpacing), \
91 mm2mils100(PinWidth), \
92 mm2mils100(PinSpacing - PinWidth), \
93 mm2mils100(PinWidth)+600, \
94 '"pin%i"' % (19-pin), '"%i"' % (19-pin), '0x0000]'
97 mm2mils100(-Overall/2 + PinWidth/2), \
98 mm2mils100(-2.5 + pin * PinSpacing), \
99 mm2mils100(-Overall/2 + PinHeight - PinWidth/2), \
100 mm2mils100(-2.5 + pin * PinSpacing), \
101 mm2mils100(PinWidth), \
102 mm2mils100(PinSpacing - PinWidth), \
103 mm2mils100(PinWidth)+600, \
104 '"pin%i"' % (27+pin), '"%i"' % (27+pin), '0x0000]'
106 print ' ElementArc[',\
109 '500 500 0 360 1000 ]'