P89V662单片机解密

0 次 时间：2009-08-27 / 11:11:59 来源：夏生

P89V662 description：

The P89V662 are 80C51 microcontrollers with32 kB flash and
1 kB of data RAM. These devices are designed to be drop-in and software
compatible replacements for the P89V662 devices. Both the In-System
Programming (ISP) and In-Application Programming (IAP) boot codes are upward
compatible.
Additional features of the P89V662 devices when compared to the
P89V662 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.

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
·32 kB of on-chip flash user code memory with ISP and IAP
·1 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)