W78E52 DatasheetEdited by (
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Description:
The W78E52 has the following features including 8-bit CMOS microcontroller;Fully static design;Low standby current at full supply voltage;DC-40 MHz operation;256 bytes of on-chip scratchpad RAM;8 KB electrically erasablelprogrammable EPROM;64 KB program memory address space;64 KB data memory address space;Four 8-bit bidirectional ports;Three 16-bit timer/counters;One full duplex serial port;Boolean processor;Six-source, two-level interrupt capability;Built-in power management;Code protection mechanism.
The W78E52 is an 8-bit microcontroller that is functionally compatible with the W78C52，excePt that the mask ROM is rePlaced by a flash EEPROM with a size of 8 KB.To fecilitate Programming and verification，the flash EEPROM inside the W78E52 allows the Program memory to be Programmed and read electronically.Once the code is confirmed.the user can Protect the code for security.The VV78E52 microcontroller suPPlies a wider frequency range than most 8-bit microcontrollers on the market.It is functionally comPatible with the industry-standard 80C52 microcontroller series.The W78E52 contains four 8-bit bidirectional and bit-addressable I/O ports, three 16-bit timer/counters, and a serial port. These peripherals are supported by a six-source, two-level interrupt capability. There are 256 bytes of RAM and an 8 KB flash EEPROM for application programs.The W78E52 microcontroller has two power reduction modes, idle mode and power-down mode, both of which are software selectable. The idle mode turns off the processor clock but allows for continued peripheral operation. The power-down mode stops the crystal oscillator for minimum power consumption. The external clock can be stopped at any time and in any state without affecting the processor.
The W78E52 architecture consists of a core controller surrounded by various registers, four general purpose I/O ports, 256 bytes of RAM, three timer/counters, and a serial port. The processor supports 111 different opcodes and references both a 64K program address space and a 64K data storage space.The W78E52 is designed to be used with either a crystal oscillator or an external clock. Internally, the clock is divided by two before it is used. This makes the W78E52 relatively insensitive to duty cycle variations in the clock.
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