???????????????????????????????????????
???????????????????????????????????????
N32903U1DN???ARM926EJ-S??????????????JPEG?????????CMOS?????????32????????????????(SPU)??ADC??DAC???????????????????????????????????????????????
??200MHz?????ARM926?????SDRAM??2D BitBLT????????LCD????USB1.1 Host??USB 2.0 Device?????????????N32903U1DN??????????????????????
N32903U1DN???????????640x480??TFT LCD????????????2D BitBLT??????????????????????????????????????Ч????????????CPU?????????????
N32903U1DN????CMOS?????????????λ?(bitmap)????÷??????????????г???λ??
N32903U1DN???Linux??????????????????????????????????????WiFi????????????????棬??????????ò????????????䶮
?????????????????????????N3290x???????о??????????DRAM?????128-pin LQFP??о???(MCP)??????
N32903U1DN??4Mbx16 SDRAM???????о???????????Ч?????????????????????????EMI?????????????????????????PCB???塢??С??PCB?????????輰EMI???????????????????N32903U1DN??????????????С??PCB??????????????????????????????????????????
N32903????????????????????????????????????????????????????????????????????????????壬?????????????????????????????????????TURBO WRITER,??972?????????????????????????????????????????????????????????
?????????????????????????н????????????????
IC ??????????? , ???跀??????. ???????????? ?????????裨R??,??У?L???????C???·?????
V(t) = L * di/dt Transient voltage drop
L ?????? i???? t??? V???????????? di????????? dt??????? di/dt???????????????
???PAD loading : 3~5pF
????10mil ???????PCB traces ???:???:??~=0.02 Ohm/in : 2pF/in : 20nH/in
DIP/PLCC L effect: 5~15nH.(1nH/mm)
????power droop/ground bounce bonding (10nH) + PCB ground plane L effect.
Double bonding & good power/ground plane.
????????????????NAND boot???????????ο????????????????????????????????????
????????????????
972369124
