Product category:
Microprocessors, Microcontrollers and DSPs
News Release from: Flint | Subject: Winbond W77E532
Edited by the Electronicstalk Editorial
Team on 20 August 2002
Microcontroller saves on wasted cycles
A novel 8051-compatible MCU features a redesigned processor core that eliminates wasted clock and memory cycles, and so executes 8051 instructions significantly faster at any given crystal speed.
Then latest 8051-compatible microcontroller from Flint features a redesigned processor core that eliminates wasted clock and memory cycles, and so executes 8051 instructions significantly faster at any crystal speed The Winbond W77E532 from Flint does this by reducing the machine cycle duration from the standard 12 clock periods to four, and providing dual data pointers to speed up block data transfers
This article was originally published on Electronicstalk on 24 Aug 2005 at 8.00am (UK)
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In consequence, execution times are typically 1.5 to 3 times faster depending on the type of instruction.
Overall a 2.5x performance improvement is gained.
The W77E532 has 128Kbyte of in-system programmable bank-addressed Flash EEPROM for application software, together with a 4Kbyte auxiliary Flash EEPROM for loader programmes.
In addition, the microcontroller provides 64byte of nonvolatile memory for critical data storage, 256byte of scratchpad RAM, and has 1K of MOVX SRAM.
As the latest in the Turbo 51 series, the device can also adjust the time required for accessing off-chip memory (MOVX instruction), allowing it to work with fast or slower external RAM and peripherals equally efficiently.
Offering the same performance at a lower clock speed also means significant savings in power consumption.
Oscillator and clock circuitry is provided on-chip.
A wide range of versatile user features and peripherals includes: four 8bit I/O ports, an extra 4bit I/O port and wait state control signal, three 16bit timers, 12 interrupt sources with two levels of priority, two enhanced full-duplex serial ports, programmable watchdog timer, and dual 16bit data pointers.
Access to external peripherals and RAM is fully programmable in software.
Three power saving features are incorporated.
As well as the standard idle and power down modes there is a new economy mode, in which the user can switch the clock rate to standard frequency divided by 4, 64 or 1024.
Operating current is 50mA, reducing to 20mA while the device is idling.
Packaging options include DIP-40, PLCC-44 and QFP-44, with samples available now from Flint.
As with other Turbo 51 devices, the W77E532 enjoys a wide base of support from industry-standard programming and development tools, backed by Flint's design-in and technical support network.
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