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v 20081231 1
C 40000 40000 0 0 0 title-bordered-A3.sym
T 49400 40900 8 10 1 1 0 0 1
data=2008-08-13 / 2009-05-15
T 53300 40600 8 10 1 1 0 0 1
rev=v0.1.4j
T 49400 40600 8 10 1 1 0 0 1
fname=../openarm/power-on-reset.sch
T 52300 41150 8 10 1 1 0 0 1
auth=Jelle de Jong <jelledejong@powercraft.nl>
T 49400 40300 8 10 1 1 0 0 1
page=02
T 50900 40300 8 10 1 1 0 0 1
pages=14
T 48800 41150 8 10 1 1 0 0 1
tiltle=OpenARM SBC Power On Design
T 52300 41400 8 10 1 1 0 0 1
company=PowerCraft Technology
T 52300 40900 8 10 1 1 0 0 1
licence=GPLv3
T 53350 40300 8 10 1 1 0 0 1
project=OpenARM SBC Project
C 41900 48900 1 0 0 input-1.sym
{
T 41900 48900 5 10 0 0 0 0 1
net=+1.2V:1
T 41800 49000 5 8 1 1 0 7 1
value=+1.2V
}
C 41900 48200 1 0 0 input-1.sym
{
T 41900 48200 5 10 0 0 0 0 1
net=+3.125V:1
T 41800 48300 5 8 1 1 0 7 1
value=+3.125V
}
C 41900 47500 1 0 0 input-1.sym
{
T 41900 47500 5 10 0 0 0 0 1
net=+3.281V:1
T 41800 47600 5 8 1 1 0 7 1
value=+3.281V
}
N 42700 47600 42900 47600 4
N 42900 47600 42900 47800 4
N 42700 48300 42900 48300 4
N 42900 48300 42900 48500 4
N 42700 49000 42900 49000 4
N 42900 49000 42900 49200 4
C 42700 49200 1 0 0 generic-power.sym
{
T 42900 49450 5 8 1 1 0 3 1
net=+1.2V:1
}
C 42700 48500 1 0 0 generic-power.sym
{
T 42900 48750 5 8 1 1 0 3 1
net=+3.125V:1
}
C 42700 47800 1 0 0 generic-power.sym
{
T 42900 48050 5 8 1 1 0 3 1
net=+3.281V:1
}
C 47300 49200 1 90 0 resistor-2.sym
{
T 46950 49600 5 10 0 0 90 0 1
device=MC 0.1W 0805 1% 10K
T 47000 49400 5 10 1 1 90 0 1
refdes=R201
T 47400 49400 5 10 1 1 90 2 1
value=10k
T 47300 49200 5 10 0 1 90 0 1
footprint=0805
}
C 44700 47800 1 90 0 capacitor-1.sym
{
T 44000 48000 5 10 0 0 90 0 1
device=GRM21BR71H104KA01L
T 44200 48000 5 10 1 1 90 0 1
refdes=C201
T 43800 48000 5 10 0 0 90 0 1
symversion=0.1
T 44700 47800 5 10 0 0 90 0 1
footprint=0805
T 44800 48000 5 10 1 1 90 2 1
value=100nF
}
C 44300 49200 1 0 0 generic-power.sym
{
T 44500 49450 5 8 1 1 0 3 1
net=+3.125V:1
}
C 44400 47300 1 0 0 gnd-1.sym
C 45500 47800 1 0 0 gnd-1.sym
N 44700 48900 44500 48900 4
N 44500 48700 44500 49200 4
N 45600 48100 45600 48300 4
N 44500 47800 44500 47600 4
N 46500 48900 47200 48900 4
N 47200 46100 47200 49200 4
N 48100 48900 47200 48900 4
{
T 48100 48900 5 10 0 0 0 0 1
netname=nRSTA
T 48000 48950 5 10 1 1 0 6 1
value=\_aRST\_
}
N 47200 50100 47200 50300 4
C 44700 45000 1 90 0 capacitor-1.sym
{
T 44000 45200 5 10 0 0 90 0 1
device=GRM21BR71H104KA01L
T 44200 45200 5 10 1 1 90 0 1
refdes=C202
T 43800 45200 5 10 0 0 90 0 1
symversion=0.1
T 44700 45000 5 10 0 0 90 0 1
footprint=0805
T 44800 45200 5 10 1 1 90 2 1
value=100nF
}
C 44300 46400 1 0 0 generic-power.sym
{
T 44500 46650 5 8 1 1 0 3 1
net=+3.281V:1
}
C 44400 44500 1 0 0 gnd-1.sym
C 45500 45000 1 0 0 gnd-1.sym
N 44700 46100 44500 46100 4
N 44500 45900 44500 46400 4
N 45600 45300 45600 45500 4
N 44500 45000 44500 44800 4
N 46500 46100 47200 46100 4
T 48700 41900 9 10 1 0 0 0 5
There is no supervisory circuit for the +1.2V,
this is because I can't find a good and avalible IC.
I combine the supervisors on one reset line,
and hope this gives engough reliabilty.
Please see the documentation for more info.
C 45700 43000 1 90 0 resistor-2.sym
{
T 45350 43400 5 10 0 0 90 0 1
device=MC 0.1W 0805 1% 10K
T 45400 43200 5 10 1 1 90 0 1
refdes=R203
T 45800 43200 5 10 1 1 90 2 1
value=10k
T 45700 43000 5 10 0 1 90 0 1
footprint=0805
}
C 45800 41200 1 90 0 capacitor-1.sym
{
T 45100 41400 5 10 0 0 90 0 1
device=GRM21BR71H104KA01L
T 45300 41400 5 10 1 1 90 0 1
refdes=C203
T 44900 41400 5 10 0 0 90 0 1
symversion=0.1
T 45800 41200 5 10 0 0 90 0 1
footprint=0805
T 45900 41400 5 10 1 1 90 2 1
value=100nF
}
C 44300 42500 1 0 0 resistor-2.sym
{
T 44700 42850 5 10 0 0 0 0 1
device=MC 0.1W 0805 1% 100R
T 44500 42800 5 10 1 1 0 0 1
refdes=R202
T 44500 42400 5 10 1 1 0 2 1
value=100
T 44300 42500 5 10 0 1 0 0 1
footprint=0805
}
C 42900 42600 1 0 0 switch-pushbutton-no-1.sym
{
T 43200 42900 5 10 1 1 0 0 1
refdes=S201
T 43200 42500 5 10 0 0 0 2 1
device=B3S-1000
T 42900 42600 5 10 0 0 0 0 1
footprint=SW_SPNO_OMRON_B3S-1000
}
C 42500 42000 1 0 0 gnd-1.sym
N 42900 42600 42600 42600 4
N 42600 42600 42600 42300 4
N 44300 42600 43900 42600 4
C 45400 44200 1 0 0 generic-power.sym
{
T 45600 44450 5 8 1 1 0 3 1
net=+3.281V:1
}
N 45200 42600 45600 42600 4
N 45600 42100 45600 43000 4
N 45600 43900 45600 44200 4
C 45500 40700 1 0 0 gnd-1.sym
N 45600 41000 45600 41200 4
C 53600 45900 1 0 0 output-1.sym
{
T 53600 45900 5 10 0 0 0 0 1
net=RESET_N:1
T 54500 46000 5 10 1 1 0 1 1
value=RESET_N
}
C 53300 46400 1 90 0 resistor-2.sym
{
T 52950 46800 5 10 0 0 90 0 1
device=MC 0.1W 0805 1% 4K7
T 53000 46600 5 10 1 1 90 0 1
refdes=R204
T 53400 46600 5 10 1 1 90 2 1
value=4k7
T 53300 46400 5 10 0 1 90 0 1
footprint=0805
}
N 53200 47500 53200 47300 4
N 45600 42600 46900 42600 4
{
T 46900 42600 5 10 0 0 0 0 1
netname=nRSTB
T 46800 42650 5 10 1 1 0 6 1
value=\_bRST\_
}
C 53000 47500 1 0 0 generic-power.sym
{
T 53200 47750 5 8 1 1 0 3 1
net=+1.2V:1
}
C 47000 50300 1 0 0 generic-power.sym
{
T 47200 50550 5 8 1 1 0 3 1
net=+3.281V:1
}
N 53200 46400 53200 46000 4
N 53600 46000 52800 46000 4
N 52800 45700 53200 45700 4
N 53200 45700 53200 46000 4
N 53000 49700 54500 49700 4
{
T 54500 49700 5 10 0 0 0 0 1
netname=nonbuf_nRSTA
T 54400 49750 5 10 1 1 0 6 1
value=\_nonbuf_aRST\_
}
C 44700 48300 1 0 0 MCP120-1.sym
{
T 45000 49300 5 10 1 1 0 0 1
device=MCP120T-300I/TT
T 44995 50470 5 10 0 0 0 0 1
footprint=SOT23-95P-240L1-3N__On-Semi_318-08-Package
T 44995 49495 5 10 1 1 0 0 1
refdes=U201
}
C 44700 45500 1 0 0 MCP120-1.sym
{
T 45000 46500 5 10 1 1 0 0 1
device=MCP120T-315I/TT
T 44995 47670 5 10 0 0 0 0 1
footprint=SOT23-95P-240L1-3N__On-Semi_318-08-Package
T 44995 46695 5 10 1 1 0 0 1
refdes=U202
}
T 53800 44600 9 10 1 0 0 0 4
INPUT OUTPUT
A Y
L L
H Z
C 53000 45200 1 0 0 generic-power.sym
{
T 53200 45450 5 8 1 1 0 3 1
net=+3.281V:1
}
C 53100 44400 1 0 0 gnd-1.sym
N 53200 45200 53200 45100 4
N 53200 45100 52800 45100 4
N 52800 44800 53200 44800 4
N 53200 44800 53200 44700 4
C 50300 44200 1 0 0 SN74LVC2G07.sym
{
T 50500 46400 5 10 1 1 0 0 1
device=SN74LVC2G07DBVR
T 50500 46600 5 10 1 1 0 0 1
footprint=SOT23-95P-280L1-6N__LTC_S6_Package
T 50500 46800 5 10 1 1 0 0 1
refdes=U204
}
C 50300 48200 1 0 0 SN74LVC1G08.sym
{
T 50500 50100 5 10 1 1 0 0 1
device=SN74LVC1G08DBVRG4
T 50500 50300 5 10 1 1 0 0 1
footprint=SOT23-95P-280L1-5N__LTC_S5_Package
T 50500 50500 5 10 1 1 0 0 1
refdes=U203
}
C 53200 49200 1 0 0 generic-power.sym
{
T 53400 49450 5 8 1 1 0 3 1
net=+3.281V:1
}
C 53300 48400 1 0 0 gnd-1.sym
N 53400 49200 53400 49100 4
N 53400 48800 53400 48700 4
N 53400 49100 53000 49100 4
N 53000 48800 53400 48800 4
T 50500 48200 9 10 1 0 0 0 1
Y = A * B or Y = \_A\_ + \_B\_
L 51900 48400 52000 48400 3 0 0 0 -1 -1
L 52450 48400 52000 48400 3 0 0 0 -1 -1
N 50300 49700 49600 49700 4
{
T 50300 49700 5 10 0 0 0 0 1
netname=nRSTA
T 50200 49750 5 10 1 1 0 6 1
value=\_aRST\_
}
N 50300 49400 49600 49400 4
{
T 50300 49400 5 10 0 0 0 0 1
netname=nRSTB
T 50200 49450 5 10 1 1 0 6 1
value=\_bRST\_
}
N 50300 46000 48900 46000 4
{
T 50300 46000 5 10 0 0 0 0 1
netname=nonbuf_nRSTA
T 50200 46050 5 10 1 1 0 6 1
value=\_nonbuf_aRST\_
}
C 49400 45600 1 0 0 input-1.sym
{
T 49400 45600 5 10 0 0 0 0 1
net=nonbuf_nRSTB:1
T 49300 45700 5 10 1 1 0 7 1
value=\_nonbuf_bRST\_
}
N 50300 45700 50200 45700 4