參數(shù)資料
型號(hào)： TS80C31X2-VLBD
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-bit CMOS Microcontroller ROMless
中文描述： 8-BIT, 40 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, LCC-44
文件頁(yè)數(shù)： 6/40頁(yè)
文件大?。?/td> 484K
代理商： TS80C31X2-VLBD
6
Rev. A - Mar. 19, 1999
Preliminary
TS80C31X2
6. TS80C31X2 Enhanced Features
In comparison to the original 80C31, the TS80C31X2 implements some new features, which are
:
The X2 option.
The Dual Data Pointer.
The 4 level interrupt priority system.
The power-off flag.
The ONCE mode.
Enhanced UART
6.1 X2 Feature
The TS80C31X2 core needs only 6 clock periods per machine cycle. This feature called ”X2” provides the following
advantages:
G
Divide frequency crystals by 2 (cheaper crystals) while keeping same CPU power.
G
Save power consumption while keeping same CPU power (oscillator power saving).
G
Save power consumption by dividing dynamically operating frequency by 2 in operating and idle modes.
G
Increase 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 signal 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 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 1. shows the clock generation block
diagram. X2 bit is validated on XTAL1
÷
2 rising edge to avoid glitches when switching from X2 to STD mode.
Figure 2. shows the mode switching waveforms.
Figure 1. Clock Generation Diagram
XTAL1
2
CKCON reg
X2
state machine: 6 clock cycles.
CPU control
F
OSC
F
XTAL
0
1
XTAL1:2
相關(guān)PDF資料
PDF描述
TS80C31X2-VLBR 8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCB 8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCD 8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCR 8-bit CMOS Microcontroller ROMless
TS80C31X2-VLEB 8-bit CMOS Microcontroller ROMless
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS80C31X2-VLBR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCD 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-VLCR 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
TS80C31X2-VLEB 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless
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