ViewSonic N3260w-1NT Service Manual page 16

CPU circuit
• U27 M30620 is 16 BITS CMOS CPU，the main CPU of the system.
• (Address Bus)：A[0:7] and A[8:18]
• Data Bus) ：AD[0:7]
• U19 W29C040 is 4Megabit(512K X 8- bit) Flash Memory，the main function is store program.
• U23 is Reset IC，reset CPU U29 at the beginning of Power ON
• CPU U27 via I2C SDA/SCL(SDA_5V /SCL_5V) to connect and control U38 SCALER IC EX52 and transmits data
via Address Bus：A[0:7] and Data Bus ：AD[0:7].
• U22 PIC16F505 is the second CPU，the main function is instead the main CPU U27 M30620 to detect Remote
controller and control On/Off button to order the system power on while this machine is in Stand-By mode. This
step can assure this machine has low consumption power as it is in Stand-By
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mode.
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N3260wb_N3760wb