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