MEMORY ORGANIZATION

PROGRAM MEMORY: Up to 16 Kbytes of the program memory can reside in the on-chip EPROM. The device can also address up to 64K of program memory external to the chip.

■ Extended Automotive Temperature

Range (b40§C to a125§C Ambient)

■ High Performance CHMOS EPROM

■ Three 16-Bit Timer/Counters

■ One-to-Three Level Program/Data Lock System

■ 16K On-Chip EPROM/ROM

■ 256 Bytes of On-Chip Data RAM

■ Quick Pulse Programming Algorithm

■ Boolean Processor

■ 32 Programmable I/O Lines

■ 7 Interrupt Sources

■ 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 Compatible Instruction Set

■ Power Saving Idle and Power Down Modes

■ ONCE (On-Circuit Emulation) Mode

■ RFI Reduction Mode

■ Available in 12 MHz, 16 MHz and 20 MHz Versions

■ Available in PLCC and DIP Packages