2 # Copyright 2021 by Bdale Garbee <bdale@gag.com>. GPLv3
4 # Emit PCB footprint for RGZ0048A package used by TI CC1310 with RGZT suffix
7 # dimensions in mm from the ti/cc1310/cc1310.pdf datasheet
10 PinResist = 0.38 # width of gap in solder resist over pad
16 PasteSquare = 1.06 # paste spots over ground tab
18 ViaDrill = 0.254 # mfg spec is 0.2, >= 10 mil AC standard spec
21 SideViaSpacing = 1.065
25 # we're going to use the 1/100 of a mil fundamental unit form
27 return int( mm / 25.4 * 1000.0 * 100.0 + 0.5 )
29 print '# author: Bdale Garbee'
30 print '# email: bdale@gag.com'
31 print '# dist-license: GPL 3'
32 print '# use-license: unlimited'
34 print 'Element[0x0 "QFN48" "" "" 0 0 0 0 0 100 0x0]'
37 # pad under the chip, must be grounded
43 mm2mils100(GndSquare), \
45 mm2mils100(GndSquareMask), \
46 '"pin49" "49" "square,nopaste"]'
48 # vias in the ground pad under the chip
49 for viarow in range (-1,2):
52 mm2mils100(-CoreViaSpacing - SideViaSpacing), \
53 mm2mils100(viarow * CoreViaSpacing), \
54 mm2mils100(ViaPadSize), \
55 mm2mils100(ViaPadSize), \
57 mm2mils100(ViaDrill), \
58 '"pin49" "49" 0x0002]'
61 mm2mils100(CoreViaSpacing + SideViaSpacing), \
62 mm2mils100(viarow * CoreViaSpacing), \
63 mm2mils100(ViaPadSize), \
64 mm2mils100(ViaPadSize), \
66 mm2mils100(ViaDrill), \
67 '"pin49" "49" 0x0002]'
70 mm2mils100(viarow * CoreViaSpacing), \
71 mm2mils100(-CoreViaSpacing - SideViaSpacing), \
72 mm2mils100(ViaPadSize), \
73 mm2mils100(ViaPadSize), \
75 mm2mils100(ViaDrill), \
76 '"pin49" "49" 0x0002]'
79 mm2mils100(viarow * CoreViaSpacing), \
80 mm2mils100(CoreViaSpacing + SideViaSpacing), \
81 mm2mils100(ViaPadSize), \
82 mm2mils100(ViaPadSize), \
84 mm2mils100(ViaDrill), \
85 '"pin49" "49" 0x0002]'
88 for viacol in range (-1,2):
90 mm2mils100(viacol * CoreViaSpacing), \
91 mm2mils100(viarow * CoreViaSpacing), \
92 mm2mils100(ViaPadSize), \
93 mm2mils100(ViaPadSize), \
95 mm2mils100(ViaDrill), \
96 '"pin49" "49" 0x0002]'
98 # solder paste squares in a grid on central ground pad
99 for pasterow in range (-2, 2):
100 for pastecol in range (-2, 2):
102 mm2mils100(pastecol * PasteGrid + PasteGrid/2), \
103 mm2mils100(pasterow * PasteGrid + PasteGrid/2), \
104 mm2mils100(pastecol * PasteGrid + PasteGrid/2), \
105 mm2mils100(pasterow * PasteGrid + PasteGrid/2), \
106 mm2mils100((PasteSquare)), \
108 mm2mils100((PasteSquare)), \
109 '"pin49" "49" "square"]'
112 for pin in range (1,13):
114 mm2mils100(-3.25 + pin * PinSpacing), \
115 mm2mils100(-Overall/2 - PinHeight/2 + PinWidth/2), \
116 mm2mils100(-3.25 + pin * PinSpacing), \
117 mm2mils100(-Overall/2 + PinHeight/2 - PinWidth/2), \
118 mm2mils100(PinWidth), \
119 mm2mils100(PinSpacing - PinWidth), \
120 mm2mils100(PinResist), \
121 '"pin%i"' % (37-pin), '"%i"' % (37-pin), '"square"]'
124 mm2mils100(-3.25 + pin * PinSpacing), \
125 mm2mils100(+Overall/2 - PinHeight/2 + PinWidth/2), \
126 mm2mils100(-3.25 + pin * PinSpacing), \
127 mm2mils100(+Overall/2 + PinHeight/2 - PinWidth/2), \
128 mm2mils100(PinWidth), \
129 mm2mils100(PinSpacing - PinWidth), \
130 mm2mils100(PinResist), \
131 '"pin%i"' % pin, '"%i"' % pin, '"square"]'
134 mm2mils100(Overall/2 - PinHeight/2 + PinWidth/2), \
135 mm2mils100(-3.25 + pin * PinSpacing), \
136 mm2mils100(Overall/2 + PinHeight/2 - PinWidth/2), \
137 mm2mils100(-3.25 + pin * PinSpacing), \
138 mm2mils100(PinWidth), \
139 mm2mils100(PinSpacing - PinWidth), \
140 mm2mils100(PinResist), \
141 '"pin%i"' % (25-pin), '"%i"' % (25-pin), '"square"]'
144 mm2mils100(-Overall/2 - PinHeight/2 + PinWidth/2), \
145 mm2mils100(-3.25 + pin * PinSpacing), \
146 mm2mils100(-Overall/2 + PinHeight/2 - PinWidth/2), \
147 mm2mils100(-3.25 + pin * PinSpacing), \
148 mm2mils100(PinWidth), \
149 mm2mils100(PinSpacing - PinWidth), \
150 mm2mils100(PinResist), \
151 '"pin%i"' % (36+pin), '"%i"' % (36+pin), '"square"]'
153 print ' ElementArc[',\
156 '500 500 0 360 1000 ]'