80C51 Microcontroller - 4T

Part No.	W77L516A
Datasheet	W77LE516_W77L516A.pdf
Description	The W77L516A is a fast 8051 compatible microcontroller with a redesigned processor core without wasted clock and memory cycles. As a result, it executes every 8051 instruction faster than the original 8051 for the same crystal speed. Typically, the instruction executing time of W77L516A is 1.5 to 3 times faster then that of traditional 8051, depending on the type of instruction. In general, the overall performance is about 2.5 times better than the original for the same crystal speed. Giving the same throughput with lower clock speed, power consumption has been improved. The W77L516A contains In-System Programmable (ISP) 64 KB Flash EPROM; 4KB auxiliary Flash EPROM for loader program; operating voltage from 2.7V to 5.5V; on-chip 1 KB MOVX SRAM; three power saving modes.
Features	8-bit CMOS microcontroller Wide supply voltage of 2.7V to 5.5V High speed architecture of 4 clocks/machine cycle runs up to 20 MHz Pin compatible with standard 80C52 Instruction-set compatible with MCS-51 64KB on-chip Mask-ROM Four 8-bit I/O Ports; Port 0 has internal pull-up resisters enabled by software One extra 4-bit I/O port and Wait State control signal (available on 44-pin PLCC/QFP package) Three 16-bit Timers 12 interrupt sources with two levels of priority On-chip oscillator and clock circuitry Two enhanced full duplex serial ports 64KB In-system Programmable Flash EPROM (APROM) 4KB Auxiliary Flash EPROM for loader program (LDROM) 256 bytes scratch-pad RAM 1KB on-chip SRAM for MOVX instruction Programmable Watchdog Timer Dual 16-bit Data Pointers Software programmable access cycle to external RAM/peripherals
Diagram	N/A
Package	DIP40, PLCC44, PQFP44 (Lead-Free RoHS)
Other Files	N/A
Development Tools	N/A
Others	N/A

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