英语翻译X=0,3 or 7.L-low voltage version.Operates at 3 volts.*20MHz for commercial and 16MHz for express:In table 6.1 from (6) to (11) the microcontrollers with X = 0 are ROMless;with X = 3,are with ROM; and with X=7,are EPROM/OTP.FROM 1 to 5,pro