MEMORY ORGANIZATION PROGRAM MEMORY: Up to 8 Kbytes of the program memory can reside in the 87C51FA On-Chip EPROM. Up to 16 Kbytes of the program memory can reside in the 87C51FB on-chip EPROM. Up to 32 Kbytes of the program memory can reside in the 87C51FC on-chip EPROM. In addition the device can address up to 64K of program memory external to the chip. FX Core Architecture Device Extended Automotive Temperature Range (b40§Ctoa125§C Ambient) Available in 12 MHz, 16 MHz and 20 MHz Versions High Performance CHMOS EPROM Three 16-Bit Timer/Counters Timer 2 (Up/Down Counter) Programmable Counter Array with: High Speed Output, Compare/Capture, Pulse Width Modulator, Watchdog Timer Capabilities One-to-Three Level Program Lock System on EPROM 8K On-Chip User Programmable EPROM in 87C51FA 16K On-Chip User Programmable EPROM in 87C51FB 32K On-Chip User Programmable EPROM in 87C51FC 256 Bytes of On-Chip Data RAM Quick Pulse Programming Algorithm Boolean Processor 32 Programmable I/O Lines 7 Interrupt Sources Four Level Interrupt Priority Programmable Serial Channel with: Framing Error Detection Automatic Address Recognition TTL and CMOS Compatible Logic Levels 64K External Program Memory Space 64K External Data Memory Space MCSÉ-51 Fully Compatible Instruction Set Power Saving Idle and Power Down Modes ONCE (On-Circuit Emulation) Mode RFI Reduction Mode Available in PLCC and PDIP Packages
PROGRAM MEMORY: Up to 8 Kbytes of the program memory can reside in the 87C51FA On-Chip EPROM. Up to 16 Kbytes of the program memory can reside in the 87C51FB on-chip EPROM. Up to 32 Kbytes of the program memory can reside in the 87C51FC on-chip EPROM. In addition the device can address up to 64K of program memory external to the chip. DATA MEMORY: This microcontroller has a 256 x 8 on-chip RAM. In addition it can address up to 64 Kbytes of external data memory. The Intel 87C51FA/87C51FB/87C51FC is a single-chip control-oriented microcontroller which is fabricated on Intel"s reliable CHMOS EPROM technology. Being a member of the MCS-51 family, the 87C51FB/87C51FC uses the same powerful instruction set, has the same architecture, and is pin-for-pin compatible with the existing MCS-51 family of products. The 87C51FA is an enhanced version of the 87C51. The 87C51FB is an enhanced version of the 87C51FA. The 87C51FC is an enhanced version of the 87C51FB.