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PIC16LF1947-E/MR 参数 Datasheet PDF下载

PIC16LF1947-E/MR图片预览
型号: PIC16LF1947-E/MR
PDF下载: 下载PDF文件 查看货源
内容描述: [64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology]
分类和应用: 微控制器
文件页数/大小: 440 页 / 4740 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F/LF1946/47  
TABLE 26-2: LCD BIAS VOLTAGES  
26.3 LCD Bias Voltage Generation  
Static Bias  
1/2 Bias  
1/3 Bias  
The LCD module can be configured for one of three  
bias types:  
LCD Bias 0  
LCD Bias 1  
LCD Bias 2  
LCD Bias 3  
VSS  
VSS  
VSS  
1/2 VDD  
1/2 VDD  
VLCD3  
1/3 VDD  
2/3 VDD  
VLCD3  
• Static Bias (2 voltage levels: VSS and VLCD)  
• 1/2 Bias (3 voltage levels: VSS, 1/2 VLCD and  
VLCD)  
VLCD3  
• 1/3 Bias (4 voltage levels: VSS, 1/3 VLCD,  
2/3 VLCD and VLCD)  
So that the user is not forced to place external compo-  
nents and use up to three pins for bias voltage generation,  
internal contrast control and an internal reference ladder  
are provided internally to the PIC16F/LF1946/47. Both of  
these features may be used in conjunction with the exter-  
nal VLCD<3:1> pins, to provide maximum flexibility. Refer  
to Figure 26-3.  
FIGURE 26-3:  
LCD BIAS VOLTAGE GENERATION BLOCK DIAGRAM  
LCDIRE  
LCDIRS  
LCDA  
VDD  
1.024V from  
FVR  
3.072V  
x 3  
LCDRLP1  
LCDRLP0  
LCDIRE  
LCDIRS  
LCDA  
LCDCST<2:0>  
VLCD3PE  
LCDA  
VLCD3  
lcdbias3  
VLCD2PE  
VLCD2  
lcdbias2  
BIASMD  
VLCD1PE  
VLCD1  
lcdbias1  
lcdbias0  
2010 Microchip Technology Inc.  
Preliminary  
DS41414A-page 335  
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