at83c22ok/at83c23ok [updated 5/03. 2 Pages] at83c22ok/at83c23ok [更新5日2页] at83c22ok is based on Atmel C51 MCU and include OMNIKEYfirmware. This single-chip turnkey solutions can be quickly and easily integrated into any USB smart card peripheral. at83c23ok is based on Atmel C51 MCU and include OMNIKEY?firmware. This single-chip turnkey solutions can be quickly and easily integrated into any USB smart card keyboard or peripheral.