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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§C to a125§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