Features
80C51 Core :
6 Clocks per Instruction Speed up to 16 MH- 768 Bytes RAM AT83C5122: 32 Kbytes ROM AT83C5123: 30 Kbytes ROM AT85C5122: 32 Kbytes Code RAM and 32 Kbytes ROM AT89C5122 : 32 Kbytes Flash AT85EC5122, AT83EC5123, AT83EC5122: Additional 512 Bytes EEPROM (AT24C04) Multi-protocol Smart Card Interface Certified According to ISO7816, EMV2000, GIE-CB and WHQM Standards Asynchronous Protocols T = 0 and T = 1, with Direct and Inverse Modes Step-up, Down Converter with Prog