# -*- m4 -*- # $Id: qfn.inc,v 1.2 2005/07/18 22:09:18 danmc Exp $ # COPYRIGHT # # PCB, interactive printed circuit board design # Copyright (C) 2003 Dan McMahill # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. # # # # QFN packages # # $1: canonical name # $2: name on PCB # $3: value # $4: number of pins # $5: body size (mm) # $6: pad pitch (1/100 mm) # $7: PCB pad width (1/100 mm) # $8: Package pad length (1/100 mm) # $9: Exposed paddle size, 0 for no exposed paddle (1/100 mm) define(`PKG_GENERIC_QFN', ` # number of pins on left/right sides (pin1 is upper pin on left side) define(`LRPINS', `eval($4 / 4)') # number of pins on top/bottom sides define(`TBPINS', `eval(`$4' / 2 - LRPINS)') # pin pitch (1/1000 mil) define(`PITCH',`eval(`$6'*100000/254)') # y-coordinate for upper pin on left/right sides (1/1000 mil) define(`LRYMAX', `eval((LRPINS-1)*PITCH/2)') # x-coordinate for right pin on top/bottom sides (1/1000 mil) define(`TBXMAX', `eval((TBPINS-1)*PITCH/2)') # total horizontal package width (1/1000 mil) define(`LRWIDTHMM', `ifelse(0,`$5',`787',`eval($5)')') define(`LRWIDTH', `ifelse(0,`$5',`787',`eval(`$5'*10000000/254)')') # total vertical package width (1/1000 mil) define(`TBWIDTH',`ifelse(0,`$5',`551',`eval(`$5'*10000000/254)')') # how much pads extend beyond the package edge (1/1000 mil) (the 25 is 0.25 mm) define(`EXTOUT', eval(25*100000/254)) # how much pads extend inward from the package pad edge (1/1000 mil) define(`EXTIN', eval(5*100000/254)) # pad length/width (1/1000 mil) define(`PADLENGTH', `eval(`$8'*100000/254)') define(`PADWIDTH', `eval(`$7'*100000/254)') # pad width (mil/100) define(`PADWIDTHMIL100', `eval(PADWIDTH/10)') # min/max x coordinates for the pads on the left/right sides of the package (mil/100) define(`LRXMAX',`eval((LRWIDTH/2 + EXTOUT - PADWIDTH/2)/10)') define(`LRXMIN',`eval((LRWIDTH/2 -PADLENGTH - EXTIN + PADWIDTH/2)/10)') # min/max y coordinates for the pads on the top/bottom sides of the package (mil/100) define(`TBYMAX',`eval((TBWIDTH/2 + EXTOUT - PADWIDTH/2)/10)') define(`TBYMIN',`eval((TBWIDTH/2 -PADLENGTH - EXTIN + PADWIDTH/2)/10)') # silkscreen width (mils/100) define(`SILKW', 1000) # how much the silk screen is moved away from the package (1/1000 mil) define(`SILKEXT', `eval(EXTOUT + SILKW*10/2 + 5*1000)') # upper right corner for silk screen (mil/100) define(`SILKX', `eval((LRWIDTH/2 + SILKEXT )/10)') define(`SILKY', `eval((TBWIDTH/2 + SILKEXT )/10)') # refdes text size (mil/100) define(`TEXTSIZE', 100) # x,y coordinates for refdes label (mil/100) define(`TEXTX', -SILKX) define(`TEXTY', `eval(-SILKY - 1000 - TEXTSIZE/2)') # square exposed paddle size (mil/100) define(`EPSIZE', `eval(`$9'*10000/254)') # width of the pad solder mask relief (1/100 mil). # grow by 1.5 mils on each side define(`PADMASK', `eval(2*150 + PADWIDTHMIL100)') # width of the paddle soldermask relief (1/100 mil) # grow by 200 mils on each side define(`EPMASK', `eval(2*200 + EPSIZE)') # element_flags, description, pcb-name, value, mark_x, mark_y, # text_x, text_y, text_direction, text_scale, text_flags Element[0x00000000 "$1" "$2" "$3" 0 0 TEXTX TEXTY 0 TEXTSIZE 0x00000000] ( # Pad[X1, Y1, X2, Y3, width, clearance, # soldermask, "pin name", "pin number", flags] # left row define(`CURPIN', 1) define(`idx',0) forloop(`i', 1, LRPINS, `define(`Y', `eval((-LRYMAX + PITCH*idx)/10)')' `Pad[-LRXMAX Y -LRXMIN Y PADWIDTHMIL100 0 PADMASK "CURPIN" "CURPIN" 0x00000100]' `define(`CURPIN', incr(CURPIN))' `define(`idx',incr(idx))' ) # bottom row define(`idx',0) forloop(`i', 1, TBPINS, `define(`X', `eval((-TBXMAX + PITCH*idx)/10)')' `Pad[X TBYMAX X TBYMIN PADWIDTHMIL100 0 PADMASK "CURPIN" "CURPIN" 0x00000900]' `define(`CURPIN', incr(CURPIN))' `define(`idx',incr(idx))' ) # right row define(`idx',0) forloop(`i', 1, LRPINS, `define(`Y', `eval(( LRYMAX - PITCH*idx)/10)')' `Pad[LRXMAX Y LRXMIN Y PADWIDTHMIL100 0 PADMASK "CURPIN" "CURPIN" 0x00000100]' `define(`CURPIN', incr(CURPIN))' `define(`idx',incr(idx))' ) # top row define(`idx',0) forloop(`i', 1, TBPINS, `define(`X', `eval((TBXMAX - PITCH*idx)/10)')' `Pad[X -TBYMAX X -TBYMIN PADWIDTHMIL100 0 PADMASK "CURPIN" "CURPIN" 0x00000900]' `define(`CURPIN', incr(CURPIN))' `define(`idx',incr(idx))' ) # Exposed paddle (if this is an exposed paddle part) ifelse(1, eval(EPSIZE>0), # Pad(X1, Y1, X2, Y3, width, clearance, # soldermask, "pin name", "pin number", flags) Pad[0 0 0 0 EPSIZE 0 EPMASK "CURPIN" "CURPIN" 0x00000100] define(`CURPIN', incr(CURPIN)) ) # Silk screen around package ElementLine[ SILKX SILKY SILKX -SILKY SILKW] ElementLine[ SILKX -SILKY -SILKX -SILKY SILKW] ElementLine[-SILKX -SILKY -SILKX SILKY SILKW] ElementLine[-SILKX SILKY SILKX SILKY SILKW] # Pin 1 indicator ElementLine[-SILKX -SILKY eval(-SILKX - 1500) eval(-SILKY - 1500) SILKW] )') # ------------------------------------------------------------------- # The following macros take: # $1: canonical name # $2: name on PCB # $3: value # $4: number of pins # $5: body size (mm) # $6: exposed paddle size (1/100 mm). 0 for no exposed paddle # For an exposed paddle package, the paddle for an 'n' pin package is pin 'n+1' # 0.8 mm pitch define(`PKG_QFN_80', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `80',`42',`60', `$6')') # 0.65 mm pitch define(`PKG_QFN_65', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `65',`37',`60', `$6')') # 0.50 mm pitch, 0.6 mm pad length define(`PKG_QFN_50', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `50',`28',`60', `$6')') # 0.50 mm pitch, 0.4 mm pad length define(`PKG_QFN_50S',`PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `50',`28',`40', `$6')') # 0.40 mm pitch define(`PKG_QFN_40', `PKG_GENERIC_QFN(`$1',`$2',`$3',`$4',`$5', `40',`25',`60', `$6')') # PKG_GENERIC_QFN # $1: canonical name # $2: name on PCB # $3: value # $4: number of pins # $5: body size (mm) # $6: pad pitch (1/100 mm) # $7: PCB pad width (1/100 mm) # $8: Package pad length (1/100 mm) # $9: Exposed paddle size, 0 for no exposed paddle (1/100 mm) # -------------------------------------------------------------------