GENERAL DESCRIPTION
The W78L801 is an 8-bit microcontroller which can accommodate a wide range of supply voltages with low power consumption. The instruction set for the W78L801 is fully compatible with the standard 8051. The W78L801 contains an 4K bytes Mask ROM; a 256 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 6-bit I/O port P4; two 16-bit timer/counters; a hardware watchdog timer. These peripherals are supported by a twelve sources two-level interrupt capability. The W78L801 does not contain serial port.

FEATURES
• Fully static design 8-bit CMOS microcontroller
• Wide supply voltage of 1.8V to 5.5V
• DC-24 MHz operation
• 256 bytes of on-chip scratchpad RAM
• 4 KB Mask-ROM
• 64 KB program memory address space
• 64 KB data memory address space
• Four 8-bit bi-directional ports; Port 0 has internal pull-up resisters enabled by software
• Two 16-bit timer/counters
• Watchdog Timer
• Direct LED drive outputs
• Twelve sources, two-level interrupt capability
• Wake-up via external interrupts at Port 1
• EMI reduction mode
• Built-in power management
• Code protection mechanism
• Packages:
    − DIP 40: W78L801-24
    − PLCC 44: W78L801P-24
    − PQFP 44: W78L801F-24
    − Lead Free (RoHs)DIP 40: W78L801A24DL
    − Lead Free (RoHs)PLCC 44: W78L801A24PL
    − Lead Free (RoHs)PQFP 44: W78L801A24FL
    − Lead Free (RoHs)LQFP 48: W78L801A24LL