AT89LP4052-20SU Datasheet PDF - Microchip

●The AT89LP4052-20SU is a low-power high-performance 8-bit CMOS Microcontroller with 4kB of In-system programmable flash memory. The device is manufactured using high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. The AT89LP4052 is built around an enhanced CPU core that can fetch a single byte from memory every clock cycle. In the classic 8051 architecture, each fetch required 6 clock cycles, forcing instructions to execute in 12, 24 or 48 clock cycles. In the AT89LP4052 CPU, instructions need only 1 to 4 clock cycles providing 6 to 12 times more throughput than the standard 8051. Seventy percent of instructions need only as many clock cycles as they have byte to execute and most of the remaining instructions require only one additional clock. The enhanced CPU core is capable of 20MIPS throughput whereas the classic 8051 CPU can deliver only 4MIPS at the same current consumption.