W77LE516 Datasheet, PDF (2/89 Pages) Winbond – 8-BIT MICROCONTROLLER

W77LE516/W77L516A
1. GENERAL 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. Consequently, the
W77L516A is a fully static CMOS design; it can also be operated at a lower crystal clock. The
W77L516A contains In-System Programmable (ISP) 64 KB AP Flash EPROM; 4KB LD Flash EPROM
for loader program; operating voltage from 2.7V to 5.5V; on-chip 1 KB MOVX SRAM; two power
saving modes.
2. FEATURES
• 8-bit CMOS microcontroller
• High speed architecture of 4 clocks/machine cycle runs up to 25 MHz
• Pin compatible with standard 80C52
• Instruction-set compatible with MCS-51
• 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(APFLASH)
• 4KB Auxiliary Flash EPROM for loader program (LDFLASH)
• 256 bytes scratch-pad RAM
• 1 KB on-chip SRAM for MOVX instruction
• Programmable Watchdog Timer
• Software Reset
• Dual 16-bit Data Pointers
• Software programmable access cycle to external RAM/peripherals
• Packages:
− Lead Free(RoHs) DIP 40: W77L516A25DL
− Lead Free(RoHs) PLCC 44: W77L516A25PL
− Lead Free(RoHs) QFP 44: W77L516A25FL
-2-