參數(shù)資料
型號(hào)： HD66702
廠商： Hitachi,Ltd.
英文描述： Dot Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器)
中文描述： 點(diǎn)陣式液晶顯示控制器/驅(qū)動(dòng)器（點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器）
文件頁(yè)數(shù)： 17/69頁(yè)
文件大?。?/td> 352K
代理商： HD66702
HD66702/HD66701
17
Display Data RAM (DDRAM)
Display data RAM (DDRAM) stores display data represented in 8-bit character codes. Its extended
capacity is 80
×
8 bits, or 80 characters. The area in display data RAM (DDRAM) that is not used for
display can be used as general data RAM. See Figure 1 for the relationships between DDRAM addresses
and positions on the liquid crystal display.
The DDRAM address (A
DD
) is set in the address counter (AC) as hexadecimal.
1-line display (N = 0) (Figure 2)
When there are fewer than 80 display characters, the display begins at the head position. For
example, if using only the HD66702, 20 characters are displayed. See Figure 3.
When the display shift operation is performed, the DDRAM address shifts. See Figure 3.
AC6AC5 AC4 AC3AC2 AC1AC0
1
0
0
1
1
1
0
AC
(hexadecimal)
Example: DDRAM address 4E
High order
bits
Low order
bits
Figure 1 DDRAM Address
00
01
02
03
04
4E
4F
DDRAM
address
(hexadecimal)
Display position
(digit)
1
2
3
4
5
79
80
. . . . . . . . . . . . . . . . . .
Figure 2 1-Line Display
DDRAM
address
Display
position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
For
shift left
10 11 12 13 14
For
shift right
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
4F
Figure 3 1-Line by 20-Character Display Example
相關(guān)PDF資料
PDF描述
HD66702R Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66727A04TA0L Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66720 Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66727A03TA0L Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66705U Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver(圖形LCD控制器/驅(qū)動(dòng)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66702R 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HD66702RA00F 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
HD66702RA00FL 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
HD66702RA01F 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:LCD Display Driver
HD66702RA02F 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:IC-SM-LCD CONTROLLER
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