8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER J Real Time and Programmed Wait State Bus Operation Binary-code Compatible with MCS® 51 J J J w w J a D .
w Pin Compatible with 44-lead PLCC and 40-lead PDIP MCS 51 Sockets Register-based MCS 251 Architecture 40-byte Register File Registers Accessible as Bytes, Words, and Double Words Enriched MCS 51 Instruction Set 16-bit and 32-bit Arithmetic and Logic Instructions Compare and Conditional Ju