參數(shù)資料
型號(hào)： AT80C51RA2-SLSIM
廠商： International Rectifier
英文描述： High Performance 8-bit Microcontroller
中文描述： 高性能8位微控制器
文件頁(yè)數(shù)： 12/85頁(yè)
文件大小： 762K
代理商： AT80C51RA2-SLSIM
12
4188E–8051–08/06
AT/TS8xC51Rx2
5.2
TS80C51Rx2 Enhanced Features
In comparison to the original 80C52, the TS8xC51Rx2 implements some new features, which
are
:
The X2 option.
The Dual Data Pointer.
The extended RAM.
The Programmable Counter Array (PCA).
The Watchdog.
The 4 level interrupt priority system.
The power-off flag.
The ONCE mode.
The ALE disabling.
Some enhanced features are also located in the UART and the timer 2.
5.3
X2 Feature
The TS80C51Rx2 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 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.
5.3.1
Description
The clock for the whole circuit and peripheral is first divided by two before being used by the
CPU core and 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 5-1
shows the clock generation block diagram. X2 bit is validated on XTAL1
÷
2 ris-
ing edge to avoid glitches when switching from X2 to STD mode.
Figure 5-2
shows the mode
switching waveforms.
相關(guān)PDF資料
PDF描述
AT80C51RA2-SLSIV High Performance 8-bit Microcontroller
AT80C51RA2-SLSUL High Performance 8-bit Microcontroller
AT80C51RA2-SLSUM High Performance 8-bit Microcontroller
AT80C51RD2-3CSUL High Performance 8-bit Microcontroller
AT80C51RD2-3CSUM High Performance 8-bit Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT80C51RA2-SLSIV 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller
AT80C51RA2-SLSUL 功能描述:8位微控制器 -MCU RLESS RA 40MHZ 3V 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT80C51RA2-SLSUM 功能描述:8位微控制器 -MCU RLESS RA 40MHZ 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
AT80C51RB2-3CSCM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
AT80C51RB2-3CSIM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller
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