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GENERAL DESCRIPTIONhttp://www.icdec.com
The W78E52B is an 8-bit microcontroller which can accommodate a wider frequency range with low power consumption. The instruction set for the W78E52B is fully compatible with the standard 8051.The W78E52B contains an 8K bytes MTP ROM (Multiple-Time Programmable ROM); a 256 bytes
RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by eight sources two-level interrupt capability. To facilitate programming and verification, the MTP-ROM inside the W78E52B allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security.
FEATURES
¡¤Fully static design 8-bit CMOS microcontroller
¡¤Wide supply voltage of 4.5V to 5.5V
¡¤256 bytes of on-chip scratchpad RAM
¡¤8 KB electrically erasable/programmable MTP-ROM
¡¤64 KB program memory address space
¡¤64 KB data memory address space
¡¤Four 8-bit bi-directional ports
¡¤One extra 4-bit bit-addressable I/O port, additional INT2/INT3
(available on 44-pin PLCC/QFP package)
¡¤Three 16-bit timer/counters
¡¤One full duplex serial port(UART)
¡¤Watchdog Timer
¡¤Eight sources, two-level interrupt capability
¡¤EMI reduction mode
¡¤Built-in power management
¡¤Packages:
- DIP 40: W78E52B-24/40
- PLCC 44: W78E52BP-24/40
- PQFP 44: W78E52BF-24/40

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