89C668

INTEGRATED CIRCUITS P89C668 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM Preliminary data Supersedes data of 2001 Jul 19 IC28 Data Handbook 2001 Jul 27 Philips Semiconductors Philips Semiconductors 80C51 8-bit Flash microcontroller family 64KB ISP Flash with 8KB RAM Preliminary data 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 structure, an enhanced UART and on-chip oscillator and timing circuits. The added features of the P89C668 makes it a powerful microcontroller for applications that require pulse widt...