P89C668
DESCRIPTION
The P89C668 device contains a non-volatile 64 kbytes Flash program memory that is both parallel programmable and serial In-System Programmable. In-System Programming allows devices to alter their own program memory, in the actual end product, under software control. This opens up a range of applications that can include the ability to field update the application firmware.
A default serial loader (boot loader) program in ROM allows serial In-System programming of the Flash memory without the need for a loader in the Flash code. User programs may erase and reprogram the Flash memory at will through the use of standard routines contained in ROM.
This device is a Single-Chip 8-Bit Microcontroller manufactured in advanced CMOS process and is a derivative of the 80C51 microcontroller family. The device has the same instruction set as the 80C51.
The device also has four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, four-priority-level, nested interrupt...
