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HE84770C(S)

更新时间： 2022-01-18 18:38:00
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其他 - ETC /
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HE84770C(S) 数据手册

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King Billion Electronics Co., Ltd  
HE84770C  
駿 億 電 子 股 份 有 限 公 司  
HE80000 SERIES  
000  
001  
010  
011  
100  
101  
110  
111  
1/7  
1/7.5  
1/8  
1/8.5  
1/9  
1/9.5  
1/10  
1/10.5  
6.1. LCDC Control register  
The gray scale of the LCD driver can be adjusted by GRAY field of LCD. The LCD panel can be blanked  
by setting the BLANK field of LCDC register. LCD driver can be totally turned off by clearing LCDE bit  
of LCDC.  
LCDC  
Field  
Reset  
bit 7  
-
-
bit 6  
-
-
bit 5  
-
-
bit 4  
-
bit 3  
GRAY  
-
bit 2  
-
bit 1  
bit 0  
BLANK LCDE  
1
0
Field  
Value Function  
GRAY  
000 LCD is darkest.  
111 LCD is lightest.  
BLANK  
0
1
normal display  
LCD display blanked. The COM signals of LCD driver output inactive levels  
(LVL4 and LVL1) while SEG signals output normal display patterns.  
LCD driver disabled, LCD driver has no output signal.  
LCD driver Enabled  
LCDE  
0
1
Please note that LCD driver must be turned off before the MCU goes into sleep mode. In other words,  
user must clear the bit 0 (LCDE bit) of LCDC to turn off LCD driving circuit before setting bit6 of OP1  
to enter sleep mode. Large current might happen if the procedure is not followed.  
Please note that LCD driver uses slow clock as clock source. The LCD display would not display  
normally if it worked in Fast clock only mode as the LCD refresh action would be too fast.  
7.Oscillators  
The MCU is equipped with two clock sources with a variety of selections on the types of oscillators to  
choose from. So that system designer can select oscillator types based on the cost target, timing accuracy  
requirements etc. Crystal, Resonator or the RC oscillator can be used as fast clock source, components  
should be placed as close to the pins as possible. The type of oscillator used is selected by mask option  
MO_FXTAL.  
August 25, 2003  
Page 10 of 25  
V1.1E  
This specification is subject to change without notice. Please contact sales person for the latest version before use.  
1...78910111213...25

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