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Rev 241 Rev 262
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v 20080127 1
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v 20080127 1
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C 40000 40000 0 0 0 title-bordered-A3.sym
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C 40000 40000 0 0 0 title-bordered-A3.sym
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T 49400 40900 8 10 1 1 0 0 1
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T 49400 40900 8 10 1 1 0 0 1
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data=2008-08-13
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data=2008-08-13
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T 53300 40600 8 10 1 1 0 0 1
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T 53300 40600 8 10 1 1 0 0 1
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rev=v0.1.2j
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rev=v0.1.3j
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T 49400 40600 8 10 1 1 0 0 1
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T 49400 40600 8 10 1 1 0 0 1
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fname=../openarm/power-on-reset.sch
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fname=../openarm/power-on-reset.sch
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T 52300 41150 8 10 1 1 0 0 1
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T 52300 41150 8 10 1 1 0 0 1
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auth=Jelle de Jong <jelledejong@powercraft.nl>
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auth=Jelle de Jong <jelledejong@powercraft.nl>
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T 49400 40300 8 10 1 1 0 0 1
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T 49400 40300 8 10 1 1 0 0 1
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page=02
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page=02
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T 50900 40300 8 10 1 1 0 0 1
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T 50900 40300 8 10 1 1 0 0 1
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pages=20
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pages=14
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T 48800 41150 8 10 1 1 0 0 1
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T 48800 41150 8 10 1 1 0 0 1
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tiltle=OpenARM SBC Power On Design
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tiltle=OpenARM SBC Power On Design
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T 52300 41400 8 10 1 1 0 0 1
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T 52300 41400 8 10 1 1 0 0 1
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company=PowerCraft Technology
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company=PowerCraft Technology
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T 52300 40900 8 10 1 1 0 0 1
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T 52300 40900 8 10 1 1 0 0 1
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C 42700 47800 1 0 0 generic-power.sym
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C 42700 47800 1 0 0 generic-power.sym
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{
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{
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T 42900 48050 5 8 1 1 0 3 1
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T 42900 48050 5 8 1 1 0 3 1
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net=+3.281V:1
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net=+3.281V:1
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}
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}
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C 47100 49200 1 90 0 resistor-2.sym
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C 47300 49200 1 90 0 resistor-2.sym
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{
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{
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T 46750 49600 5 10 0 0 90 0 1
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T 46950 49600 5 10 0 0 90 0 1
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device=RESISTOR
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device=MC 0.1W 0805 1% 10K
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T 46800 49400 5 10 1 1 90 0 1
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T 47000 49400 5 10 1 1 90 0 1
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refdes=R201
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refdes=R201
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T 47200 49400 5 10 1 1 90 2 1
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T 47400 49400 5 10 1 1 90 2 1
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value=10k
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value=10k
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T 47100 49200 5 10 0 1 90 0 1
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T 47300 49200 5 10 0 1 90 0 1
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footprint=0805
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footprint=0805
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}
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}
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C 44700 47800 1 90 0 capacitor-1.sym
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C 44700 47800 1 90 0 capacitor-1.sym
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{
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{
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T 44000 48000 5 10 0 0 90 0 1
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T 44000 48000 5 10 0 0 90 0 1
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device=CAPACITOR
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device=GRM21BR71H104KA01L
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T 44200 48000 5 10 1 1 90 0 1
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T 44200 48000 5 10 1 1 90 0 1
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refdes=C201
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refdes=C201
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T 43800 48000 5 10 0 0 90 0 1
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T 43800 48000 5 10 0 0 90 0 1
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symversion=0.1
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symversion=0.1
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T 44700 47800 5 10 0 0 90 0 1
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T 44700 47800 5 10 0 0 90 0 1
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C 45500 47800 1 0 0 gnd-1.sym
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C 45500 47800 1 0 0 gnd-1.sym
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N 44700 48900 44500 48900 4
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N 44700 48900 44500 48900 4
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N 44500 48700 44500 49200 4
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N 44500 48700 44500 49200 4
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N 45600 48100 45600 48300 4
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N 45600 48100 45600 48300 4
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N 44500 47800 44500 47600 4
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N 44500 47800 44500 47600 4
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N 46500 48900 47000 48900 4
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N 46500 48900 47200 48900 4
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N 47000 46100 47000 49200 4
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N 47200 46100 47200 49200 4
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N 47900 48900 47000 48900 4
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N 48100 48900 47200 48900 4
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{
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{
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T 47900 48900 5 10 0 0 0 0 1
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T 48100 48900 5 10 0 0 0 0 1
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netname=nRSTA
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netname=nRSTA
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T 47800 48950 5 10 1 1 0 6 1
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T 48000 48950 5 10 1 1 0 6 1
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value=\_aRST\_
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value=\_aRST\_
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}
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}
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N 47000 50100 47000 50300 4
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N 47200 50100 47200 50300 4
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C 44700 45000 1 90 0 capacitor-1.sym
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C 44700 45000 1 90 0 capacitor-1.sym
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{
111 
{
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T 44000 45200 5 10 0 0 90 0 1
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T 44000 45200 5 10 0 0 90 0 1
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device=CAPACITOR
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device=GRM21BR71H104KA01L
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T 44200 45200 5 10 1 1 90 0 1
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T 44200 45200 5 10 1 1 90 0 1
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refdes=C202
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refdes=C202
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T 43800 45200 5 10 0 0 90 0 1
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T 43800 45200 5 10 0 0 90 0 1
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symversion=0.1
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symversion=0.1
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T 44700 45000 5 10 0 0 90 0 1
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T 44700 45000 5 10 0 0 90 0 1
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C 45500 45000 1 0 0 gnd-1.sym
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C 45500 45000 1 0 0 gnd-1.sym
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N 44700 46100 44500 46100 4
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N 44700 46100 44500 46100 4
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N 44500 45900 44500 46400 4
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N 44500 45900 44500 46400 4
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N 45600 45300 45600 45500 4
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N 45600 45300 45600 45500 4
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N 44500 45000 44500 44800 4
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N 44500 45000 44500 44800 4
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N 46500 46100 47000 46100 4
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N 46500 46100 47200 46100 4
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T 48700 41900 9 10 1 0 0 0 5
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T 48700 41900 9 10 1 0 0 0 5
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There is no supervisory circuit for the +1.2V,
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There is no supervisory circuit for the +1.2V,
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this is because I can't find a good and avalible IC.
137 
this is because I can't find a good and avalible IC.
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I combine the supervisors on one reset line,
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I combine the supervisors on one reset line,
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and hope this gives engough reliabilty.
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and hope this gives engough reliabilty.
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Please see the documentation for more info.
140 
Please see the documentation for more info.
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C 45700 43000 1 90 0 resistor-2.sym
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C 45700 43000 1 90 0 resistor-2.sym
142 
{
142 
{
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T 45350 43400 5 10 0 0 90 0 1
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T 45350 43400 5 10 0 0 90 0 1
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device=RESISTOR
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device=MC 0.1W 0805 1% 10K
145 
T 45400 43200 5 10 1 1 90 0 1
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T 45400 43200 5 10 1 1 90 0 1
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refdes=R203
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refdes=R203
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T 45800 43200 5 10 1 1 90 2 1
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T 45800 43200 5 10 1 1 90 2 1
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value=10k
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value=10k
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T 45700 43000 5 10 0 1 90 0 1
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T 45700 43000 5 10 0 1 90 0 1
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footprint=0805
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footprint=0805
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}
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}
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C 45800 41200 1 90 0 capacitor-1.sym
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C 45800 41200 1 90 0 capacitor-1.sym
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{
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{
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T 45100 41400 5 10 0 0 90 0 1
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T 45100 41400 5 10 0 0 90 0 1
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device=CAPACITOR
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device=GRM21BR71H104KA01L
156 
T 45300 41400 5 10 1 1 90 0 1
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T 45300 41400 5 10 1 1 90 0 1
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refdes=C203
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refdes=C203
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T 44900 41400 5 10 0 0 90 0 1
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T 44900 41400 5 10 0 0 90 0 1
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symversion=0.1
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symversion=0.1
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T 45800 41200 5 10 0 0 90 0 1
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T 45800 41200 5 10 0 0 90 0 1
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value=100nF
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value=100nF
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}
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}
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C 44300 42500 1 0 0 resistor-2.sym
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C 44300 42500 1 0 0 resistor-2.sym
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{
166 
{
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T 44700 42850 5 10 0 0 0 0 1
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T 44700 42850 5 10 0 0 0 0 1
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device=RESISTOR
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device=MC 0.1W 0805 1% 100R
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T 44500 42800 5 10 1 1 0 0 1
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T 44500 42800 5 10 1 1 0 0 1
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refdes=R202
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refdes=R202
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T 44500 42400 5 10 1 1 0 2 1
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T 44500 42400 5 10 1 1 0 2 1
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value=100
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value=100
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T 44300 42500 5 10 0 1 0 0 1
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T 44300 42500 5 10 0 1 0 0 1
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footprint=0805
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footprint=0805
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}
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}
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C 42900 42600 1 0 0 switch-pushbutton-no-1.sym
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C 42900 42600 1 0 0 switch-pushbutton-no-1.sym
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{
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{
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T 43300 42900 5 10 1 1 0 0 1
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T 43200 42900 5 10 1 1 0 0 1
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refdes=S201
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refdes=S201
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T 43300 43200 5 10 0 0 0 0 1
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T 43200 42500 5 10 0 0 0 2 1
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device=SWITCH_PUSHBUTTON_NO
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device=B3S-1000
- 
 
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T 42900 42600 5 10 0 0 0 0 1
- 
 
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footprint=B3S-1000
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}
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}
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C 42500 42000 1 0 0 gnd-1.sym
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C 42500 42000 1 0 0 gnd-1.sym
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N 42900 42600 42600 42600 4
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N 42900 42600 42600 42600 4
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N 42600 42600 42600 42300 4
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N 42600 42600 42600 42300 4
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N 44300 42600 43900 42600 4
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N 44300 42600 43900 42600 4
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value=RESET_N
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value=RESET_N
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}
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}
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C 53300 46400 1 90 0 resistor-2.sym
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C 53300 46400 1 90 0 resistor-2.sym
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{
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{
206 
T 52950 46800 5 10 0 0 90 0 1
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T 52950 46800 5 10 0 0 90 0 1
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device=RESISTOR
209 
device=MC 0.1W 0805 1% 4K7
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T 53000 46600 5 10 1 1 90 0 1
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T 53000 46600 5 10 1 1 90 0 1
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refdes=R204
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refdes=R204
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T 53400 46600 5 10 1 1 90 2 1
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T 53400 46600 5 10 1 1 90 2 1
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value=5k
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value=4k7
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T 53300 46400 5 10 0 1 90 0 1
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T 53300 46400 5 10 0 1 90 0 1
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footprint=0805
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footprint=0805
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}
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}
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N 53200 47500 53200 47300 4
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N 53200 47500 53200 47300 4
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N 45600 42600 46900 42600 4
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N 45600 42600 46900 42600 4
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C 53000 47500 1 0 0 generic-power.sym
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C 53000 47500 1 0 0 generic-power.sym
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{
226 
{
225 
T 53200 47750 5 8 1 1 0 3 1
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T 53200 47750 5 8 1 1 0 3 1
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net=+1.2V:1
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net=+1.2V:1
227 
}
229 
}
228 
C 46800 50300 1 0 0 generic-power.sym
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C 47000 50300 1 0 0 generic-power.sym
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{
231 
{
230 
T 47000 50550 5 8 1 1 0 3 1
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T 47200 50550 5 8 1 1 0 3 1
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net=+3.281V:1
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net=+3.281V:1
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}
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}
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N 53200 46400 53200 46000 4
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N 53200 46400 53200 46000 4
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N 53600 46000 52800 46000 4
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N 53600 46000 52800 46000 4
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N 52800 45700 53200 45700 4
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N 52800 45700 53200 45700 4
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value=\_nonbuf_aRST\_
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value=\_nonbuf_aRST\_
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}
245 
}
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C 44700 48300 1 0 0 MCP120-1.sym
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C 44700 48300 1 0 0 MCP120-1.sym
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{
247 
{
246 
T 45000 49300 5 10 1 1 0 0 1
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T 45000 49300 5 10 1 1 0 0 1
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device=MCP120/130
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device=MCP120T-300I/TT
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T 44995 50470 5 10 0 0 0 0 1
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T 44995 50470 5 10 0 0 0 0 1
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footprint=SOT23
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footprint=SOT23
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T 44995 49495 5 10 1 1 0 0 1
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T 44995 49495 5 10 1 1 0 0 1
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refdes=U201
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refdes=U201
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}
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}
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C 44700 45500 1 0 0 MCP120-1.sym
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C 44700 45500 1 0 0 MCP120-1.sym
254 
{
256 
{
255 
T 45000 46500 5 10 1 1 0 0 1
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T 45000 46500 5 10 1 1 0 0 1
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device=MCP120/130
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device=MCP120T-315I/TT
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T 44995 47670 5 10 0 0 0 0 1
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T 44995 47670 5 10 0 0 0 0 1
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footprint=SOT23
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footprint=SOT23
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T 44995 46695 5 10 1 1 0 0 1
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T 44995 46695 5 10 1 1 0 0 1
260 
refdes=U202
262 
refdes=U202
261 
}
263 
}