s High Performance HMOS Process s Internal Timers/Event Counters s 2-Level interrupt Priority Structure 32 1/0 Lines (Four 8-Bit Ports) s 64K External Program Memory Space s Security Feature Protects EPROM Partss Boolean Processor s Bit-Addressable RAM s Programmable Full Duplex Serial
The MCS@51 controllers are optimized for control applications. Byte-processing and numerical operations on small data structures are facilitated by a variety of fast addressing modes for accessing the internal RAM. The instruction set provides a convenient menu of 8-bit arithmetic instructions, including multiply and divide instructions. Extensive on-chip support is provided for one-bit variables as a separate data type, allowing direct bit manipulation and testing in control and logic systems that require Boolean processing. The is an EPROM version of the 8051AH. It has 4 Kbytes of electrically programmable ROM which can be erased with ultraviolet light. His fully compatible with the 8051AH but incorporates one additional feature: a Program Memory Security bit that can be used to protect the EPROM against unauthorized readout. The H-8 is identical to the 8751 H but only operates to 8 MHz. The 8051AHP is identical to the 8051AH with the exception of the Protection Feature. To incorporate this Protection Feature, program verification has been disabled and external memory accesses have been limited to 4K. The is an enhanced version of the It is backwards compatible with the 8051AH and is fabricated with HMOS II technology. The 8052AH enhancements are listed in the table below. Also refer to this table for the ROM, ROMless and-EPROM versions of each product. Device 6052AH 8752BH Intsrnal Memory Program none X 8 ROM X 6 ROM X 8 EPROM X 8 EPROM X 8 EPROM none X 8 ROM X 8 EPROM Data X 8 RAM X 8 RAM X 8 RAM X 8 RAM X 6 RAM X 8 RAM X 6 RAM X 8 RAM X 8 RAM Timera/ Event Counters x 16-Bit Interrupts
Intel Corporationassumes no responsibility for the use of any circuit~ other than circuitryembodied in an Intel product.No other circuitpatent licenses are implied.Informationcontained herein supersedes previouslypublishedspecificationson theaa davices from Intel. O INTEL CORPORATION, 1994 October 1994 Order Numben 272318-002
The 8031AH/8051AH and 8032AH/8052AH devices are manufactured P414.1, an HMOS II process. The 8751H/8751 H-8 devices are manufactured P421.X, an HMOS-E process. The 8751BH and 8752BH devices are manufactured on P422. Additional process and reliability information is availQuality and Reliability able in Intel's Components Handbook, Order No, 210997.Part 8751 BH Prefix D N Package Type 40-Pin Plastic DIP 40-Pin CERDIP 44-Pin PLCC
NOTE: *8752BHis 36"/10" for D, and 38"/22" for N. All thermal impedance data is approximate for static air conditions IW of power dissipation. Values will change depending on operating conditions and application. See the Intel Pac/raging Handbook (Order Number 240800) for a description of Intel's thermal impedance test methodology.