v 20080110 1 C 48300 42000 0 0 0 title-A2.sym C 54700 52300 1 0 0 in-1.sym { T 54700 52600 5 10 1 1 0 0 1 refdes=usb_power T 54700 52600 5 10 0 0 0 0 1 device=INPUT } C 54700 51600 1 0 0 in-1.sym { T 54700 51900 5 10 1 1 0 0 1 refdes=jtag_power T 54700 51900 5 10 0 0 0 0 1 device=INPUT } C 61000 51000 1 0 0 max882.sym { T 62500 53200 5 10 1 1 0 0 1 refdes=U30 T 61800 52200 5 10 0 1 0 0 1 device=MAX882 T 61900 51800 5 10 0 1 0 0 1 footprint=SO8 } C 64100 51900 1 0 0 3.3V-plus-1.sym C 61800 49200 1 0 0 gnd-1.sym C 63300 51400 1 270 0 capacitor-2.sym { T 63800 51000 5 10 1 1 0 0 1 refdes=C32 T 63600 50700 5 10 1 1 0 0 1 value=2.2u T 63300 51400 5 10 0 1 0 0 1 footprint=sm1206 T 63500 52100 5 10 0 0 0 0 1 device=POLARIZED_CAPACITOR T 63500 52300 5 10 0 0 0 0 1 symversion=0.1 } C 58700 51300 1 270 0 capacitor-2.sym { T 59200 50900 5 10 1 1 0 0 1 refdes=C31 T 59000 50600 5 10 1 1 0 0 1 value=2.2u T 58700 51300 5 10 0 1 0 0 1 footprint=sm1206 T 58900 52000 5 10 0 0 0 0 1 device=POLARIZED_CAPACITOR T 58900 52200 5 10 0 0 0 0 1 symversion=0.1 } N 63100 51800 64300 51800 4 N 64300 51800 64300 51900 4 N 63500 51800 63500 51400 4 N 58900 51300 58900 52400 4 N 58000 50000 63500 50000 4 N 63500 50000 63500 50500 4 N 58900 50000 58900 50400 4 N 61600 51000 61600 50000 4 N 62100 51000 62100 50000 4 N 61900 49500 61900 50000 4 C 55800 52300 1 0 0 resistor-2.sym { T 56000 52600 5 10 1 1 0 0 1 refdes=R30 T 56200 52100 5 10 1 1 0 0 1 value=0 T 56500 52600 5 10 0 1 0 0 1 footprint=sm0805 T 56200 52650 5 10 0 0 0 0 1 device=RESISTOR } C 55800 51600 1 0 0 resistor-2.sym { T 56000 51900 5 10 1 1 0 0 1 refdes=R31 T 56200 51400 5 10 1 1 0 0 1 value=0 T 56400 51900 5 10 0 1 0 0 1 footprint=sm0805 T 56200 51950 5 10 0 0 0 0 1 device=RESISTOR } N 61000 52400 56700 52400 4 N 61000 52800 60000 52800 4 N 55800 51700 55300 51700 4 N 55800 52400 55300 52400 4 C 57800 51300 1 270 0 capacitor-1.sym { T 58300 50900 5 10 1 1 0 0 1 refdes=C30 T 58100 50600 5 10 1 1 0 0 1 value=100n T 57800 51300 5 10 0 1 0 0 1 footprint=sm1206 T 58000 52000 5 10 0 0 0 0 1 device=CAPACITOR T 58000 52200 5 10 0 0 0 0 1 symversion=0.1 } N 58000 50000 58000 50400 4 N 58000 51300 58000 52400 4 N 57000 52400 57000 51700 4 N 57000 51700 56700 51700 4 T 65700 42900 9 20 1 0 0 0 1 gTAG - Power Supply Unit T 64600 42400 9 10 1 0 0 0 1 gTAG-psu.sch T 64600 42100 9 10 1 0 0 0 1 4 T 66100 42100 9 10 1 0 0 0 1 5 T 68600 42400 9 10 1 0 0 0 1 $Revision$ T 68600 42100 9 10 1 0 0 0 1 Stefan Petersen (spe@stacken.kth.se) N 62300 51000 62300 50000 4 C 48600 42200 1 0 0 copyleft.sym { T 50900 45400 5 10 0 0 0 0 1 device=none } C 60100 50300 1 90 0 resistor-2.sym { T 60200 50800 5 10 1 1 0 0 1 refdes=R33 T 60200 50500 5 10 1 1 0 0 1 value=39k T 60000 50700 5 10 0 1 0 0 1 footprint=sm0805 T 60500 50650 5 10 0 0 0 0 1 device=RESISTOR } C 60100 51400 1 90 0 resistor-2.sym { T 60200 51900 5 10 1 1 0 0 1 refdes=R32 T 60200 51600 5 10 1 1 0 0 1 value=100k T 60200 51800 5 10 0 1 0 0 1 footprint=sm0805 T 60500 51750 5 10 0 0 0 0 1 device=RESISTOR } N 61000 51700 60800 51700 4 N 60800 51700 60800 51300 4 N 60800 51300 60000 51300 4 N 60000 51200 60000 51400 4 N 60000 50300 60000 50000 4 N 60000 52300 60000 52400 4 N 60000 52400 60000 52800 4 C 64200 52600 1 90 0 resistor-2.sym { T 64300 53200 5 10 1 1 0 0 1 refdes=R34 T 64300 52800 5 10 1 1 0 0 1 value=10k T 64200 52900 5 10 0 1 0 0 1 footprint=sm0805 T 64600 52950 5 10 0 0 0 0 1 device=RESISTOR } C 65000 52300 1 0 0 out-1.sym { T 65000 52600 5 10 1 1 0 0 1 refdes=pon_reset# T 65000 52600 5 10 0 0 0 0 1 device=OUTPUT } C 63900 53700 1 0 0 3.3V-plus-1.sym N 63100 52400 65000 52400 4 N 64100 52600 64100 52400 4 N 64100 53500 64100 53700 4 T 58400 49400 9 10 1 0 0 0 1 "low-bat" voltage is calculated T 58400 49200 9 10 1 0 0 0 1 according to the following formula: T 58400 48800 9 10 1 0 0 0 1 Vlo = Vlbi*((R32+R33)/R33), where Vlbi is 1.2V T 58400 48400 9 10 1 0 0 0 1 Here: Vlo = 1.2*139/39 = 4.3V