參數(shù)資料
型號： AT80C51RD2-RLRUM
廠商： Atmel
文件頁數(shù)： 81/81頁
文件大?。?/td> 0K
描述： IC MCU 80C51 HI PERFORM 44VQFP
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
標準包裝： 1
系列： 80C
核心處理器： 8051
芯體尺寸： 8-位
速度： 40MHz
連通性： UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器類型： ROMless
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-LQFP
包裝： 標準包裝
其它名稱： AT80C51RD2-RLRUMDKR
9
4113D–8051–01/09
AT80C51RD2
6.
Enhanced Features
In comparison to the original 80C52, the microcontrollers implement the following new features:
X2 option
Dual Data Pointer
Extended RAM
Programmable Counter Array (PCA)
Hardware Watchdog
4-level Interrupt Priority System
Power-off Flag
Power On Reset
ONCE mode
ALE disabling
Some enhanced features are also located in the UART and the Timer 2
6.1
X2 Feature and OSC Clock Generation
The microcontroller core needs only 6 clock periods per machine cycle. This feature called ”X2”
provides the following advantages:
Divides frequency crystals by 2 (cheaper crystals) while keeping same CPU power.
Saves power consumption while keeping same CPU power (oscillator power saving).
Saves power consumption by dividing dynamically the operating frequency by 2 in operating
and idle modes.
Increases CPU power by 2 while keeping same crystal frequency.
In order to keep the original C51 compatibility, a divider by 2 is inserted between the XTAL1 sig-
nal and the main clock input of the core (phase generator). This divider may be disabled by
software.
6.1.1
Description
The clock for the whole circuit and peripherals is first divided by two before being used by the
CPU core and the peripherals.
This allows any cyclic ratio to be accepted on XTAL1 input. In X2 mode, as this divider is
bypassed, the signals on XTAL1 must have a cyclic ratio between 40 to 60%.
Figure 6-1 shows the clock generation block diagram. X2 bit is validated on the rising edge of
the XTAL1
÷ 2 to avoid glitches when switching from X2 to standard mode. Figure 6-2 shows the
switching mode waveforms.
Figure 6-1.
Clock Generation Diagram
XTAL1
2
CKCON0
X2
8-bit Prescaler
F
OSC
F
XTAL
0
1
XTAL1:2
CKRL
CLK Periph
CLK CPU
Idle
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT80C51RD2-RLTIL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RD2-RLTIM 功能描述:IC MCU 8051 5V SPI 20MHZ 44-VQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標準包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB（32K x 8） 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件
AT80C51RD2-RLTUL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RD2-RLTUM 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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
AT80C51RD2-SLRUM 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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
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