Arcam rDac - Page 3

Mainmicrocircuitpage2
ThemainmicroatlocationIC107(onthediagramthisissplitintotwoareathesearemicro
powerandconfig+MicroI/O)wewilldealwithMicropowerandconfig1
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Micropowerandconfig
TwoseparatepowersuppliesarerequiredbytheAT91SAMthesearetakenfrom3V3and1V8
fortheprocessorcore–themicroisprogrammedwithbespokeArcamcodetheoscillatorfor
themicroisatX101andrunsat4MHztheTDITDOTCKTMSERASENRSTpinsare
for
developmentDebuguseandtheconnecteratlocationCON103isnotfittedtoproductionitems
MicroI/O
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Pindescriptions
Pinname Description
SPDIFINT InterruptflagfromtheSPDIFreceiver
Source TosourceselectTACTswitch
MuteRLY ControlofmuterelayviaTR100
DACMUTE DACMUTEsignaltoPin25ofWolfsonDACatlocationIC301
ENABLEKLEER ToMUXatlocationIC205A
ENABLESPDIF ToMUXatlocationIC202A
SERIALUCtoKLEER SerialcontroltoKLEERwirelessoption
SERIALKLEERtoUC SerialdatafromKLEERtoUC
SCL ToEEpromatlocationIC108/DACatlocationIC301/USBreceiverat
IC103
SDA ToEEpromatlocationIC108/DACatlocationIC301/USBreceiverat
IC103
EnableLEDS LEDsoncontrol
LED0 BinaryselectforLEDcontrolvia3–8linedecoderatlocationIC102
LED1 BinaryselectforLEDcontrolvia3–8linedecoderatlocationIC102
LED3 BinaryselectforLEDcontrolvia3–8linedecoderatlocationIC102
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