id card 5200 chip means single core single thread
125K frequency access control card, many in the market, also called ID card. Why are they called ID cards? It doesn't matter. Just know that you're using a 125k chip.
Common are EM4100, TK4100\/GK4100, EM4305, T5577,5200,8310 and 8268, a total of 7 species.
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5200,8310 and 8268 chips have little information, should be domestic cottage chips, but the configuration parameters have been adjusted.
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The first few chips are international 125K rfid chips, because of different functions, use scenarios and prices are slightly different.