GENERAL DESCRIPTION
The W78L812 is an 8-bit microcontroller which can accommodate a wide range of supply voltages with low power consumption. The instruction set for the W78L812 is fully compatible with the standard 8051. The W78L812 contains an 8K bytes Flash EPROM; a 256 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 5-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by a fourteen sources two-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the W78L812 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 2.4V to 5.5V
• 256 bytes of on-chip scratchpad RAM
• 8 KB electrically erasable/programmable
• 64 KB program memory address spa
• 64 KB data memory address s
• Four 8-bit bi-directional ports
• Three 16-bit timer/counters
• Timer 2 Clock-out
• One full duplex serial port
• Watchdog Timer
• Direct LED drive outputs
• Fourteen sources, two-level i
• Wake-up via external interrup
• EMI reduction
• Built-in power management
• Code protection mechanism
• Packages:
    − Lead Free (RoHS) DIP 40: W78L812A24DL
    − Lead Free (RoHS) PLCC 44: W78L812A24PL
    − Lead Free (RoHS) PQFP 44: W78L812A24FL
    − Lead Free (RoHS) LQFP 48: W78L812A24LL