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CircuitDescription
2-5
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E.Memory
SignalsintheOM6357 enabletwomemories.They useonly onevolt supply voltage,VDD3in
thePCF50601. This systemusesSamsung'smemory, KBB06A300M-T402. It isconsisted of128M
bitsflashNORmemoryand 128MbitsflashNAND memoryand 32MbitsUtRAM.Ithas16 bit
dataline,HD[0~15]whichisconnectedtoOM6357. Ithas23 bit address lines,HA[1~23].
CS_NAND and NCSRAM signalsischipselect.
Writing process,HWR_Nislowand it enableswriting process toflashmemoryand SRAM.
During reading process,HRD_Nislowand it enablesreading process toflashmemoryand
SRAM.EachchipselectsignalsintheOM6357 select memoryamong 2 flashmemoryand
UtRAM.
Reading orwriting procedureisprocessedafterHWR_NorHRD_Nisenabled. Memoriesuse
reset,whichisVDD3 delayfromPCF50601. HA[22]signalenableslowerbyteofSRAMand
HA[22]signalenableshigherbyteofSRAM.
F.OM6357
OM6357 isconsisted ofARMcore and DSP core.Ithas8x1Kword on-chip program/dataRAM,
55 Kwordson-chip programROMintheDSP.Ithas4K*32bitsROMand 2K*32bitsRAMinthe
ARMcore.DSP isconsisted ofKBS,JTAG,EMIand UART.ARMcoreisconsisted ofEMI,
PIC(ProgrammableInterruptController),reset/power/clock unit,DMAcontroller,TIC(TestInterface
Controller),eripheralbridge,PPI,SSI(SynchronousSerialInterface),ACC(Asynchronous
communicationscontrollers),timer,ADC,RTC(Real-TimeClock)and keyboardinterface.
KBIO(0:7),address linesofDSP core and HD[0~15].HA[1~23],address linesofARMcore and
HD[0~15], datalinesofARMcore are connectedtomemory, YMU762. MV317S(CameraDSP
Chip)controlsthe communication betweenARMcore and DSP core.
CS_NAND,NCSRAM,NCSFLASHintheARMcore are connectedtoeachmemory. HWR_N
and HRD_Ncontrol theprocess ofmemory. ExternalIRQ(InterruptRequest)signalsfromeach
units,suchas,PMUneedthe compatibleprocess.
KBIO[0~7] receivethestatusfromkeyand RXD0/TXD0/IrDA_DOWNareusedforthe
communicationsusing IRDA and datalink cable(DEBUG_DTR/RTS/TXD/RXD/CTS/DSR).
Ithas JTAG controlpins(TDI/TDO/TCK) forARMcore and DSP core.Itreceives13MHz clock
inCKIpinfromexternalTCXO.ADC(Analog toDigitalConvertor) partreceivesthestatusof
temperature, batterytype and battery voltage.
G.VC_TCXO-214C6(26MHz)
This systemusesthe26MHzTCXO,VC_TCXO-214C6. AFCcontrolsignalfromOM6357
controlsfrequencyfrom26MHzX-tal.The clock outputfrequency ofUAA3536HN is13MHz.
ThisclockisconnectedtoOM6357, YMU762.
