AT89C51RB2 带有16K系统内可编程Flash存储器

Flash (Kbytes)	16
ISP	UART
Self Program Memory	API
RAM (Bytes)	1280
F.max (MHz)	60
Vcc (V)	2.7-5.5
I/O Pins	32
UART	1
16-bit Timers	3
Watchdog	Yes
SPI	Yes
Packages	PDIP 40 LQFP 44 PLCC 44
Pb-Free Packages	PDIP 40 LQFP 44 PLCC 44

AT89C51RB2 概述

The AT89C51RB2 is a high-performance Flash version of the 80C51 8-bit micro-controllers. It contains a 16K or 32K Bytes Flash memory block for program and data.
The Flash memory can be programmed either in parallel mode or in serial mode with the ISP capability or with software. The programming voltage is internally generated from the standard VCC pin.

Part Number	Flash (Bytes)	XRAM (Bytes)	TOTAL RAM (Bytes)	I/O
AT89C51RB2	16K	1024	1280	32
AT89C51RC2	32K	1024	1280	32
AT89C51IC2	32K	1024	1280	32

The AT89C51RB2 retains all features of the 80C52 with 256 Bytes of internal RAM, a 9-source 4-level interrupt controller and three timer/counters. In addition, the AT89C51RB2 has a Programmable Counter Array, an XRAM of 1024 Bytes, a Hardware Watchdog Timer, a Keyboard Interface, an SPI Interface, a more versatile serial channel that facilitates multiprocessor communication (EUART) and a speed improvement mechanism (X2 mode). The Pinout is the standard 40/44 pins of the C52.
The fully static design reduces system power consumption of the AT89C51RB2by allowing it to bring the clock frequency down to any value, even DC, without loss of data. The AT89C51RB2 has 2 software-selectable modes of reduced activity and 8-bit clock prescaler for further reduction in power consumption. In Idle mode, the CPU is frozen while the peripherals and the interrupt system are still operating. In power-down mode, the RAM is saved and all other functions are inoperative. The added features of the AT89C51RB2 make it more powerful for applications that need pulse width modulation, high speed I/O and counting capabilities such as alarms, motor control, corded phones, and smart card readers.

AT89C51RB2 主要功能特性

• AT89C51RB280C52 Compatible
    – 8051 Pin and Instruction Compatible
    – Four 8-bit I/O Ports
    – Three 16-bit Timer/Counters
    – 256 Bytes Scratch Pad RAM
    – 9 Interrupt Sources with 4 Priority Levels
    – Dual Data Pointer
 
• AT89C51RB2Variable Length MOVX for Slow RAM/Peripherals
 
• AT89C51RB2ISP (In-system Programming) Using Standard VCC Power Supply
 
• AT89C51RB2Boot ROM Contains Low Level Flash Programming Routines and a Default Serial
  Loader
• AT89C51RB2High-speed Architecture
    – In Standard Mode:
    40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)
    60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)
    – In X2 mode (6 Clocks/machine cycle)
    20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)
    30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)
    – 16K/32K Bytes On-chip Flash Program/Data Memory
    – Byte and Page (128 Bytes) Erase and Write
    – 100K Write Cycles
 
• AT89C51RB2On-chip 1024 Bytes Expanded RAM (XRAM)
    – Software Selectable Size (0, 256, 512, 768, 1024 Bytes)
    – 256 Bytes Selected at Reset for TS87C51RB2/RC2 Compatibility
 
• AT89C51RB2 Keyboard Interrupt Interface on Port P1
 
• AT89C51RB2SPI Interface (Master/Slave Mode)
 
• AT89C51RB28-bit Clock Prescaler
 
• AT89C51RB2Improved X2 Mode with Independent Selection for CPU and Each Peripheral
 
• AT89C51RB2Programmable Counter Array 5 Channels
    – High-speed Output
    – Compare/Capture
    – Pulse Width Modulator
    – Watchdog Timer Capabilities
 
• AT89C51RB2 Asynchronous Port Reset
 
• AT89C51RB2 Full Duplex Enhanced UART
 
• AT89C51RB2Dedicated Baud Rate Generator for UART
 
• AT89C51RB2Low EMI (Inhibit ALE)
 
• AT89C51RB2Hardware Watchdog Timer (One-time Enabled with Reset-out)
 
• AT89C51RB2Power Control Modes
    – Idle Mode
    – Power-down Mode
    – Power-off Flag
 
• AT89C51RB2Power Supply:
    – 2.7 to 3.6 (3V Version)
    – 2.7 to 5.5V (5V Version)
 
• AT89C51RB2Temperature Ranges: Commercial (0 to +70°C) and Industrial (-40°C to +85°C)
 
• AT89C51RB2 Packages: PDIL40, PLCC44, VQFP44

AT89C51RB2 订购信息

Part Number	MemorySize	SupplyVoltage	TemperatureRange	Package	Packing	ProductMarking
AT89C51RB2-3CSUM	16 KBytes	5V	Industrial Green	PDIL40	Stick	89C51RB2-UM
AT89C51RB2-SLSUM		5V	Industrial Green	PLCC44	Stick	89C51RB2-UM
AT89C51RB2-RLTUM		5V	Industrial Green	VQFP44	Tray	89C51RB2-UM
AT89C51RB2-SLSUL		3V	Industrial Green	PLCC44	Stick	89C51RB2-UL
AT89C51RB2-RLTUL		3V	Industrial Green	VQFP44	Tray	89C51RB2-UL
AT89C51RB2-RLTUM		5V	Industrial Green	VQFP44	Tray	89C51RB2-UM
AT89C51RC2-3CSUM	32 KBytes	5V	Industrial Green	PDIL40	Stick	89C51RC2-UM
AT89C51RC2-SLSUM		5V	Industrial Green	PLCC44	Stick	89C51RC2-UM
AT89C51RC2-RLTUM		5V	Industrial Green	VQFP44	Tray	89C51RC2-UM
AT89C51RC2-SLSUL		3V	Industrial Green	PLCC44	Stick	89C51RC2-UL
AT89C51RC2-RLTUL		3V	Industrial Green	VQFP44	Tray	89C51RC2-UL

AT89C51RB2 应用技术支持与电子电路设计开发资源下载

1. AT89C51RB2数据手册DataSheet 下载. PDF
2. 80C51微控制器的复位输入. PDF (编号: Tech 8051 00049)
3. 80C51在系统Flash编程. PDF (编号:8051 00050)