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Description: CPU core: ARM7TDMI CPU maximum main frequency: 66MHz Operating voltage range: 3V~3.6V Internal oscillator: total RAM capacity: 16KB Number of GPIO ports: 32 ADC (units/channels/bits): 1@x4ch /12 bit peripheral/function/protocol stack: watchdog; PWM operating temperature range: - 40 ℃~+85 ℃
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