Aopen mk73le User Manual

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Normally, CODEC means a circuit that can do digital to analog conversion and also the analog 
to digital conversion. It is part of 
 sound/modem solution. 
 
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DIMM socket has total 168-pin and supports 64-bit data. It can be single or double side, the 
golden finger signals on each side of PCB are different, that is why it was called Dual In Line. 
Almost all DIMMs are made by 
, which operate at 3.3V. Note that some old DIMMs are 
made by FPM/
 and only operate at 5V. Do not confuse them with SDRAM DIMM. 
 
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The ECC mode needs 8 ECC bits for 64-bit data. Each time memory is accessed; ECC bits are 
updated and checked by a special algorithm. The ECC algorithm has the ability to detect 
double-bit error and automatically correct single-bit error while parity mode can only detect 
single-bit error.