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# $Id: qfn.inc,v 1.1 2003/10/03 00:02:03 danmc Exp $
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# PCB, interactive printed circuit board design
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# Copyright (C) 2003 Dan McMahill
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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# $6: pad pitch (1/100 mm)
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# $7: PCB pad width (1/100 mm)
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# $8: Package pad length (1/100 mm)
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# $9: Exposed paddle size, 0 for no exposed paddle (1/100 mm)
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define(`PKG_GENERIC_QFN',
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# number of pins on left/right sides (pin1 is upper pin on left side)
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define(`LRPINS', `eval($4 / 4)')
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# number of pins on top/bottom sides
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define(`TBPINS', `eval(`$4' / 2 - LRPINS)')
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# pin pitch (1/1000 mil)
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define(`PITCH',`eval(`$6'*100000/254)')
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# y-coordinate for upper pin on left/right sides (1/1000 mil)
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define(`LRYMAX', `eval((LRPINS-1)*PITCH/2)')
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# x-coordinate for right pin on top/bottom sides (1/1000 mil)
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define(`TBXMAX', `eval((TBPINS-1)*PITCH/2)')
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# total horizontal package width (1/1000 mil)
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define(`LRWIDTH', `ifelse(0,`$5',`787',`eval(`$5'*10000000/254)')')
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# total vertical package width (1/1000 mil)
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define(`TBWIDTH',`ifelse(0,`$5',`551',`eval(`$5'*10000000/254)')')
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# how much pads extend beyond the package edge (1/1000 mil)
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define(`EXTOUT', eval(25*100000/254))
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# how much pads extend inward from the package pad edge (1/1000 mil)
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define(`EXTIN', eval(5*100000/254))
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# pad length/width (1/1000 mil)
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define(`PADLENGTH', `eval(`$8'*100000/254)')
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define(`PADWIDTH', `eval(`$7'*100000/254)')
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define(`PADWIDTHMIL', `eval(PADWIDTH/1000)')
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# min/max x coordinates for the pads on the left/right sides of the package (mil)
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define(`LRXMAX',`eval((LRWIDTH/2 + EXTOUT - PADWIDTH/2)/1000)')
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define(`LRXMIN',`eval((LRWIDTH/2 -PADLENGTH - EXTIN + PADWIDTH/2)/1000)')
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# min/max y coordinates for the pads on the top/bottom sides of the package (mil)
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define(`TBYMAX',`eval((TBWIDTH/2 + EXTOUT - PADWIDTH/2)/1000)')
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define(`TBYMIN',`eval((TBWIDTH/2 -PADLENGTH - EXTIN + PADWIDTH/2)/1000)')
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# how much the silk screen is moved away from the package (1/1000 mil)
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define(`SILKEXT', `eval(EXTOUT + 10*1000)')
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# upper right corner for silk screen (mil)
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define(`SILKX', `eval((LRWIDTH/2 + SILKEXT)/1000)')
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define(`SILKY', `eval((TBWIDTH/2 + SILKEXT)/1000)')
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# silkscreen width (mils)
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# refdes text size (mil)
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define(`TEXTSIZE', 100)
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# x,y coordinates for refdes label (mil)
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define(`TEXTX', -SILKX)
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define(`TEXTY', `eval(-SILKY - 10 - TEXTSIZE/2)')
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# square exposed paddle size (mil)
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define(`EPSIZE', `eval(`$9'*100/254)')
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Element(0x00 "$1" "$2" "$3" TEXTX TEXTY 0 TEXTSIZE 0x00)
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forloop(`i', 1, LRPINS,
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`define(`Y', `eval((-LRYMAX + PITCH*idx)/1000)')'
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`Pad(-LRXMAX Y -LRXMIN Y PADWIDTHMIL "CURPIN" 0x100)'
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`define(`CURPIN', incr(CURPIN))'
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`define(`idx',incr(idx))'
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forloop(`i', 1, TBPINS,
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`define(`X', `eval((-TBXMAX + PITCH*idx)/1000)')'
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`Pad(X TBYMAX X TBYMIN PADWIDTHMIL "CURPIN" 0x100)'
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`define(`CURPIN', incr(CURPIN))'
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`define(`idx',incr(idx))'
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forloop(`i', 1, LRPINS,
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`define(`Y', `eval(( LRYMAX - PITCH*idx)/1000)')'
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`Pad(LRXMAX Y LRXMIN Y PADWIDTHMIL "CURPIN" 0x100)'
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`define(`CURPIN', incr(CURPIN))'
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`define(`idx',incr(idx))'
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forloop(`i', 1, TBPINS,
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`define(`X', `eval((TBXMAX - PITCH*idx)/1000)')'
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`Pad(X -TBYMAX X -TBYMIN PADWIDTHMIL "CURPIN" 0x100)'
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`define(`CURPIN', incr(CURPIN))'
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`define(`idx',incr(idx))'
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# Exposed paddle (if this is an exposed paddle part)
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ifelse(1, eval(EPSIZE>0), PAD(0, 0, 0, 0, EPSIZE, CURPIN))
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# Silk screen around package
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ElementLine( SILKX SILKY SILKX -SILKY SILKW)
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ElementLine( SILKX -SILKY -SILKX -SILKY SILKW)
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ElementLine(-SILKX -SILKY -SILKX SILKY SILKW)
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ElementLine(-SILKX SILKY SILKX SILKY SILKW)
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ElementLine(-SILKX -SILKY eval(-SILKX - 15) eval(-SILKY - 15) SILKW)
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# Mark at the center of the part
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# -------------------------------------------------------------------
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# The following macros take:
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# $6: exposed paddle size (1/100 mm). 0 for no exposed paddle
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# For an exposed paddle package, the paddle for an 'n' pin package is pin 'n+1'
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define(`PKG_QFN_80', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `80',`42',`60', `$6')')
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define(`PKG_QFN_65', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `65',`37',`60', `$6')')
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# 0.50 mm pitch, 0.6 mm pad length
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define(`PKG_QFN_50', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `50',`28',`60', `$6')')
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# 0.50 mm pitch, 0.4 mm pad length
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define(`PKG_QFN_50S',`PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `50',`28',`40', `$6')')
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define(`PKG_QFN_40', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `40',`25',`60', `$6')')
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# $6: pad pitch (1/100 mm)
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# $7: PCB pad width (1/100 mm)
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# $8: Package pad length (1/100 mm)
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# $9: Exposed paddle size, 0 for no exposed paddle (1/100 mm)
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# -------------------------------------------------------------------