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N87C251SB Data Sheet

(N87C251SA/SB/SP/SQ) High Performance CHMOS Microcontroller

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N87C251SB

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 — R.

N87C251SB

Download N87C251SB Datasheet

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 Jump Instructions — Expanded Set of Move Instructions Linear Addressing 256-Kbyte Expanded External Code/Data Memory Space ROM/OTPROM/EPROM Options: 16 Kbytes (SB/SQ), 8 Kbytes (SA/SP), or without ROM/OTPROM/EPROM 16-bit Internal Code Fetch 64-Kbyte Extended Stack Space On-chip Data RAM Options: 1-Kbyte (SA/SB) or 512-Byte (SP/SQ) 8-bit, “Min” 2-clock External Code Fetch in Page Mo.




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