参数资料
型号: AT89C51RB2-3CSUL
厂商: Atmel
文件页数: 44/127页
文件大小: 0K
描述: MCU 8051 16K FLASH 3V 44-PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 216
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
配用: AT89STK-11-ND - KIT STARTER FOR AT89C51RX2
23
AT89C51RB2/RC2
4180E–8051–10/06
Expanded RAM
(XRAM)
The AT89C51RB2/RC2 provides additional bytes of random access memory (RAM)
space for increased data parameter handling and high-level language usage.
AT89C51RB2/RC2 devices have expanded RAM in external data space; maximum size
and location are described in Table 18.
Table 18. Expanded RAM
The AT89C51RB2/RC2 has internal data memory that is mapped into four separate
segments.
The four segments are:
1.
The Lower 128 Bytes of RAM (addresses 00h to 7Fh) are directly and indirectly
addressable.
2.
The Upper 128 Bytes of RAM (addresses 80h to FFh) are indirectly addressable
only.
3.
The Special Function Registers, SFRs, (addresses 80h to FFh) are directly
addressable only.
4.
The expanded RAM Bytes are indirectly accessed by MOVX instructions, and
with the EXTRAM bit cleared in the AUXR register (see Table 18).
The lower 128 Bytes can be accessed by either direct or indirect addressing. The Upper
128 Bytes can be accessed by indirect addressing only. The Upper 128 Bytes occupy
the same address space as the SFR. That means they have the same address, but are
physically separate from SFR space.
Figure 8. Internal and External Data Memory Address
When an instruction accesses an internal location above address 7Fh, the CPU knows
whether the access is to the upper 128 Bytes of data RAM or to SFR space by the
addressing mode used in the instruction.
Instructions that use direct addressing access SFR space. For example:
MOV 0A0H, # data, accesses the SFR at location 0A0h (which is P2).
Part Number
XRAM Size
Address
Start
End
AT89C51RB2/RC2
1024
00h
3FFh
XRAM
Upper
128 Bytes
Internal
RAM
Lower
128 Bytes
Internal
RAM
Special
Function
Register
80h
00
0FFh or 3FFh
0FFh
00
0FFh
External
Data
Memory
0000
00FFh up to 03FFh
0FFFFh
Indirect Accesses
Direct Accesses
Direct or Indirect
Accesses
7Fh
相关PDF资料
PDF描述
DSPIC30F2020-30I/SP IC DSPIC MCU/DSP 12K 28DIP
PIC18F4515-I/PT IC MCU FLASH 24KX16 44TQFP
PIC18F97J60-I/PT IC PIC MCU FLASH 64KX16 100TQFP
PIC18F2525-I/SO IC MCU FLASH 24KX16 28SOIC
PIC18F4431-I/PT IC PIC MCU FLASH 8KX16 44TQFP
相关代理商/技术参数
参数描述
AT89C51RB2-3CSUM 功能描述:8位微控制器 -MCU C51RB2 FLASH 5V 16k ind RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT89C51RB2L1-RLTUL 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT89C51RB2-RLRIL 功能描述:IC MCU FLASH 8051 16K 3V 44-VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:89C 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,LIN,SPI,UART/USART,USI 外围设备:欠压检测/复位,POR,PWM,温度传感器,WDT 输入/输出数:16 程序存储器容量:8KB(4K x 16) 程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC(0.295",7.50mm 宽) 包装:带卷 (TR)
AT89C51RB2-RLRIM 功能描述:IC MCU FLASH 8051 16K 5V 44-VQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:89C 产品培训模块:MCU Product Line Introduction AVR® UC3 Introduction 标准包装:2,500 系列:AVR®32 UC3 B 核心处理器:AVR 芯体尺寸:32-位 速度:60MHz 连通性:I²C,IrDA,SPI,SSC,UART/USART,USB 外围设备:欠压检测/复位,DMA,POR,PWM,WDT 输入/输出数:28 程序存储器容量:128KB(128K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:32K x 8 电压 - 电源 (Vcc/Vdd):1.65 V ~ 1.95 V 数据转换器:A/D 6x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:48-TQFP 包装:带卷 (TR) 配用:ATSTK600-TQFP48-ND - STK600 SOCKET/ADAPTER 48-TQFPATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMRATEVK1101-ND - KIT DEV/EVAL FOR AVR32 AT32UC3B 其它名称:AT32UC3B1128-AUR-NDAT32UC3B1128-AURTR
AT89C51RB2-RLRUL 功能描述:8位微控制器 -MCU C51RB2 FLASH 3V 16k ind RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT