W78L801

W78L801 8-BIT MICROCONTROLLER 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. The W78L801 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. 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 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 ...