Description

The P89V51RB2/RC2/RD2 are 80C51 microcontrollers with 16/32/64 kB flash and 1024 B of data RAM. These microcontrollers offer the option to run in either conventional 80C51 clock rate or select the X2 mode to achieve twice the throughput at the same clock frequency, with reduced electromagnetic interference.

Specifications and Features

• 80C51 CPU
• 5 V operating voltage from 0 MHz to 40 MHz
• 16/32/64 kB of on-chip flash user code memory with ISP and IAP
• Supports 12-clock (default) or 6-clock mode selection via software or ISP
• SPI and enhanced UART
• PCA with PWM and capture/compare functions
• Four 8-bit I/O ports with three high-current port 1 pins (16 mA each)
• Three 16-bit timers/counters
• Programmable watchdog timer
• Eight interrupt sources with four priority levels
• Second DPTR register
• Low EMI mode (ALE inhibit)
• TTL- and CMOS-compatible logic levels
• Brownout detection
• Low power modes: Power-down mode with external interrupt wake-up and Idle mode
• DIP40, PLCC44 and TQFP44 packages

Application Scenarios

The P89V51RB2/RC2/RD2 microcontrollers are suitable for a wide range of applications that require efficient processing and low electromagnetic interference, such as automotive and industrial automation systems, consumer electronics, and medical devices.

Comparison

• Flexible X2 mode option for improved throughput or reduced EMI
• Multiple packages available for design flexibility
• Low power modes ideal for portable devices

• Not suitable for applications that require higher processing speeds than the maximum clock frequency of 40 MHz
• Limited data RAM capacity (1024 B)