The EM78P224N is an 8-bit microprocessor with low-power and high-speed CMOS technology and high noise immunity. It has a built-in 4K別15-bit and 176別8 bits in system programmable SRAM, Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides three protection bits to prevent intrusion of userˇs OTP memory code. Seven option bits are also available to meet userˇs requirements. With its enhanced OTP-ROM features, the EM78P224N provides a convenient way of developing and verifying userˇs programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. User can avail of the ELAN Writer to easily program his development code.