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HE84G752B Datasheet(PDF) 13 Page - King blillion Electronics Co.,Ltd.

Part # HE84G752B
Description  8-BIT MICRO-CONTROLLER
PDF  49 Pages
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Manufacturer  KB [King blillion Electronics Co.,Ltd.]
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HE84G752B Datasheet(HTML) 13 Page - King blillion Electronics Co.,Ltd.

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KING BILLION ELECTRONICS CO., LTD
駿
億
電
子
股
份
有
限
公
司
HE84G752B
HE80004 Series
January 21, 2005
13
V0.93
This specification is subject to change without notice. Please contact sales person for the latest version before use.
01
4
10
2 (B/W)
11
2 (B/W)
For 4 gray-scale display, 2-bit of RAM is required for each pixel and 4 bit for 16 gray-scale display, 1-bit
for black and white display. For different LCD configuration, the LCD display RAM is arranged
differently. The following figure shows one byte of RAM in different LCD configurations:
0F
0E
0D
0C
0B
0A
09
08
07
06
05
04
03
02
01
00
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Black/White
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
4 Gray scales
SEG3
SEG2
SEG1
SEG0
16 Gray scales
SEG1
SEG0
The 16 Gray Scale register GRAY0 ~ GRAYF is the mapping register between the levels selected in
RAM and the real gray scale. In other words, if the content of GRAY0 is 0x03, when value of a certain
pixel is 0, the displayed effect will correspond to actual gray level 3. The 16 gray scale display use all 16
registers GRAY0 ~ GRAYF to select among 32 available gray levels to correspond to level 0 ~ 15, while
4 gray scale display utilizes registers GRAY0 ~ GRAY3 to select among 32 gray levels to correspond to
level 0 ~ 3. Thus user can pick the gray levels which give the best and most linear effect.
16 Gray Scale registers share a common register address GRAY16. When writing is made to the register,
it will step down to next register in order. The writing sequence can be reset by clearing bit 5 of LCDC
register.
GRAY16
Field
Seq.
Bit4
Bit3
Bit2
Bit1
Bit0
Reset
1
GRAY0
0x00
2
GRAY1
0x02
3
GRAY2
0x04
4
GRAY3
0x06
5
GRAY4
0x08
6
GRAY5
0x0A
7
GRAY6
0x0C
8
GRAY7
0x0E
9
GRAY8
0x10
10
GRAY9
0x12
11
GRAYA
0x14
12
GRAYB
0x16
13
GRAYC
0x18
14
GRAYD
0x1A
15
GRAYE
0x1C
16
GRAYF
0x1E



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