W78L801

The W78L801 is a 4-bit one-chip microcomputer developed by W78L801 Microelectronics Company for low-end product applications. It has advanced system functions, special peripherals, varieties of interfaces and various operations. The W78L801 is an 8-Bit Microcontroller, packaged in a standard 40-pin dual-in-line package (DIP), and includes a powerful, 4 Bit, 8051 Central Processing Unit (CPU) powerful enough to drive LCDs and other peripherals.

The W78L801 is applicable to numerous applications, most significantly embedded systems or simple controllers. It can be used in remote controllers, robots, home security systems, toys, rechargeable batteries, digital pictures, radio frequency identification (RFID), sensors and other embedded product designs. As a robust, low-power and cost-effective solution, it excels as an embedded controller and processor in automated projects.

The W78L801 features 8K Bytes of on-chip program memory, 4K Bytes of on-chip RAM data memory, and a rich set of I/O ports and peripherals, including a High-Speed 12-Bit A/D converter, an LCD controller and interface, five channels of data and address pins, timers, pulse width modulation (PWM) output, and I2C, serial port and USB interfaces. It has 16 general purpose input/output (GPIO) pins, 7 serial-in/serial-out (SISO) bytes, a total of 10 on-chip data memories, 4 channel clock sources and four levels of priority interrupt serve interrupts. The W78L801 is also Big Endian (high Order Byte First) and little Endian (low Order Byte First) compatible, offering flexibility and convenience for designers.

In terms of its working principle, the W78L801 provides processor control, syntax operations and memory control. It is capable of performing single-instruction and single-cycle instructions. It offers a variety of instructions for manipulating memory, registers, and operating specific instructions on the data registers. The W78L801 also has an instruction set with full randomizes addressing modes and the capability to handle interrupts. It is powered by a 5V supply and operates at a maximum frequency of 20 MHz.

Overall, the W78L801 is an ideal choice for low-end embedded product applications. It provides excellent flexibility, cost-effectiveness and is powerful enough to easily drive peripherals. The powerful, 4 Bit, 8051 Central Processing Unit (CPU) is backed with an 8K Bytes on-chip ROM program memory, 4K Bytes on-chip RAM data memory, a rich set of I/O ports and peripherals, and four levels of priority interrupts. With its high-speed 12-bit A/D converter, the W78L801 is a great option for embedded projects that require low power consumption, increased functionality and robust processing power.