P89C664

P89V660/662/664 8-bit 80C51 5 V low power 16 kB/32 kB/64 kB flash microcontroller with 512 B/1 kB/2 kB RAM, dual I2C-bus, SPI Rev. 3.1 — 17 October 2011 Product data sheet 1. General description The P89V660/662/664 are 80C51 microcontrollers with 16 kB/32 kB/64 kB flash and 512 B/1 kB/2 kB of data RAM. These devices are designed to be drop-in and software compatible replacements for the P89C660/662/664 devices. Both the In-System Programming (ISP) and In-Application Programming (IAP) boot codes are upward compatible. Additional features of the P89V660/662/664 devices when compared to the P89C660/662/664 devices are the inclusion of a secondary 100 kHz byte-wide I2C-bus interface, an SPI interface, four addition I/O pins (Port 4), and the ability to erase code memory in 128-byte pages. The IAP capability combined with the 128-byte page size allows for efficient use of the code memory for non-volatile data storage. 2. Features and benefits 2.1 Principal features  Dual 100 kHz byte-wide I2C-bus interfaces  128-byte page erase for efficient use of code memory as non-volatile data storage  0 MHz to 40 MHz operating frequency in 12x mode, 20 MHz in 6x mode  16 kB/32 kB/64 kB of on-chip flash user code memory with ISP and IAP  512 B/1 kB/2 kB RAM  SPI (Serial Peripheral Interface) and enhanced UART  PCA (Programmable Counter Array) with PWM and Capture/Compare functions  Three 16-bit timers/counters  Four 8-bit I/O ports, one 4-bit I/O port  WatchDog Timer (WDT) 2.2 Ad...