參數(shù)資料
型號: AT89C51ED2-SMRUM
廠商: Atmel
文件頁數(shù): 52/137頁
文件大?。?/td> 0K
描述: IC MCU FLASH 8051 64K 5V 68PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 1
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 50
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 68-PLCC
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: AT89C51ED2-SMRUMDKR
21
4235K–8051–05/08
AT89C51RD2/ED2
8.
Dual Data Pointer Register (DPTR)
The additional data pointer can be used to speed up code execution and reduce code size.
The dual DPTR structure is a way by which the chip will specify the address of an external data
memory location. There are two 16-bit DPTR registers that address the external memory, and a
single bit called DPS = AUXR1.0 (see Table 8-1) that allows the program code to switch
between them (Refer to Figure 8-1).
Figure 8-1.
Use of Dual Pointer
Table 8-1.
AUXR1 Register
AUXR1- Auxiliary Register 1(0A2h)
External Data Memory
AUXR1(A2H)
DPS
DPH(83H) DPL(82H)
0
7
DPTR0
DPTR1
7
6
5
4
3
2
1
0
-
ENBOOT
-
GF3
0
-
DPS
Bit
Number
Bit
Mnemonic
Description
7
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
ENBOOT
Enable Boot Flash
Cleared to disable boot ROM.
Set to map the boot ROM between F800h - 0FFFFh.
4
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3
GF3
This bit is a general-purpose user flag.(1)
2
0
Always cleared
1
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
0
DPS
Data Pointer Selection
Cleared to select DPTR0.
Set to select DPTR1.
相關(guān)PDF資料
PDF描述
AT89C51IC2-RLRUM IC 8051 MCU 32K FLASH 44-VQFP
AT89C51ID2-RLRIM IC MCU FLASH 8051 64K 5V 44-VQFP
AT89C51RC-24PU IC MCU 32K FLASH 24MHZ 40-DIP
AT89C51RC2-RLRIL IC MCU FLASH 8051 32K 3V 44-VQFP
AT89C51RE2-SLRUM MCU 8051 128K FLASH 44-PLCC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89C51ED2-SMSIM 制造商:Atmel Corporation 功能描述:MCU 8-bit AT89 80C51 CISC 64KB Flash 3.3V/5V 68-Pin PLCC Stick 制造商:Atmel/Adesto Technologies 功能描述:Bulk 制造商:Atmel Corporation 功能描述:AT89C51ED2-SMSIM 8bit microcontroller
AT89C51ED2-SMSUM 功能描述:8位微控制器 -MCU C51ED2 64K FLASH 3-5.5V Ind RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT89C51ED2-UM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Flash Microcontroller
AT89C51IC2 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Flash Microcontroller with 2-wire Interface
AT89C51IC2_04 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Flash Microcontroller with 2-wire Interface