W79E532/W79L532
1. GENERAL DESCRIPTION
The W79E(L)532 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 W79E(L)532 is
1.5 to 3 times faster than 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
W79E(L)532 is a fully static CMOS design; it can also be operated at a lower crystal clock. The
W79E(L)532 contains In-System Programmable (ISP) 128 KB bank-addressed Flash EPROM; 4KB
auxiliary Flash EPROM for loader program; on-chip 1 KB MOVX SRAM; power saving modes.
2. FEATURES
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8-bit CMOS microcontroller
High speed architecture of 4 clocks/machine cycle
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, chip select
Three 16-bit Timers
7 interrupt sources with two levels of priority
On-chip oscillator and clock circuitry
One enhanced full duplex serial port
Dual 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
6 channels of 8 bit PWM
Software Reset
Software programmable access cycle to external RAM/peripherals
Code protection
Packages:
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DIP 40:
W79E532A40DN, W79L532A25DN
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PLCC 44: W79E532A40PN, W79L532A25PN
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QFP 44: W79E532A40FN, W79L532A25FN
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Lead Free (RoHS)DIP 40:
W79E532A40DL, W79L532A25DL
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Lead Free (RoHS)PLCC 44: W79E532A40PL, W79L532A25PL
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Lead Free (RoHS)QFP 44: W79E532A40FL, W79L532A25FL
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