The N79E342 series are an 8-bit 4T-8051 microcontroller which has Flash EPROM which is programmable by ICP (In Circuit Program) or by hardware writer. The instruction set of the N79E342 series are fully compatible with the standard 8052. The N79E342 series contain 2K bytes of main Flash EPROM; 128 bytes of RAM; two 16-bit timer/counters; 5 KBI inputs; 4-channel multiplexed 10-bit A/D convert. The N79E342 series supports 128 bytes NVM Data Flash EPROM. These peripherals are supported by 8 sources four-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the N79E342 series allow the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security. This product series consist of on-chip internal oscillator that runs at 455KHz to provide better power saving.