W77LE532/W77L532A
1. GENERAL DESCRIPTION
The W77L532 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 W77L532 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
W77L532 is a fully static CMOS design; it can also be operated at a lower crystal clock. The W77L532
contains In-System Programmable(ISP) 128 KB bank-addressed 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.
2. FEATURES
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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
Dula 64KB In-System Programmable Flash EPROM banks (APFLASH0 and APFLASH1)
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:
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Lead Free(RoHs) DIP 40:
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Lead Free(RoHs) PLCC 44:
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Lead Free(RoHsS) QFP 44:
W77L532A25DL
W77L532A25PL
W77L532A25FL
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