Product Summary

The P8031AH has 4 Kbytes of electrically programmable ROM which can be erased with ultraviolet light. His fully compatible with the P8031AH but incorporates one additional feature: a Program Memory Security bit that can be used to protect the EPROM against unauthorized readout. The P8031AH is identical to the 8751H but only operates up to 8 MHz. The P8031AH is an enhanced version of the 8051AH. It is backwards compatible with the 8051AH and is fabricated with HMOS II technology. The P8031AH enhancements are listed in the table below. Also refer to this table for the ROM, ROMless and-EPROM versions of each product.

Parametrics

P8031AH absolute maximum ratings: (1)Ambient Temperature Under Bias: -40℃ to + 85℃; (2)Storage Temperature: –65℃ to + 150℃; (3)Voltage on EA/Vpp Pin to Vss; (4)8751H: –0.5V to + 21.5V; (5)8751BH/6752BH –0.5V tO + 13.OV; (6)Voltage on Any Other Pinto Vss: –0.5V to + 7V; (7)Power Dissipation: 1.5W.

Features

P8031AH features: (1)High Performance HMOS Process; (2)Internal Timers/Event Counters; (3)2-Level interrupt Priority Structure; (4)32 1/0 Lines (Four 8-Bit Ports); (5)64K External Program Memory Space; (6)Security Feature Protects EPROM Parts Against Software Piracy; (7)BooleaProcessor; (8)Bit-Addressable RAM; (9)Programmable Full Duplex Serial Channel; (10)111 Instructions (64 Single-Cycle); (11)64K External Data Memory Space; (12)Extended Temperature Range (–40”C to +85”C).

Diagrams