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參數(shù)資料
| 型號： | 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)動器) |
| 中文描述： | 點(diǎn)陣式液晶顯示控制器/驅(qū)動器（點(diǎn)陣液晶顯示控制器/驅(qū)動器） |
| 文件頁數(shù)： | 29/69頁 |
| 文件大?。?/td> | 352K |
| 代理商： | HD66702 |
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HD66702/HD66701
29
Timing Generation Circuit
The timing generation circuit generates timing signals for the operation of internal circuits such as
DDRAM, CGROM and CGRAM. RAM read timing for display and internal operation timing by MPU
access are generated separately to avoid interfering with each other. Therefore, when writing data to
DDRAM, for example, there will be no undesirable interferences, such as flickering, in areas other than the
display area.
Liquid Crystal Display Driver Circuit
The liquid crystal display driver circuit consists of 16 common signal drivers and 100 segment (HD66702)
or 80 segment (HD66701) signal drivers. When the character font and number of lines are selected by a
program, the required common signal drivers automatically output drive waveforms, while the other
common signal drivers continue to output non-selection waveforms.
Sending serial data always starts at the display data character pattern corresponding to the last address of
the display data RAM (DDRAM).
Since serial data is latched when the display data character pattern corresponding to the starting address
enters the internal shift register, the HD66701/2 drives from the head display.
Cursor/Blink Control Circuit
The cursor/blink control circuit generates the cursor or character blinking. The cursor or the blinking will
appear with the digit located at the display data RAM (DDRAM) address set in the address counter (AC).
For example (Figure 8), when the address counter is 08H, the cursor position is displayed at DDRAM
address 08H.
AC6
0
AC5
0
AC4
0
AC3
1
AC2
0
AC1
0
AC0
0
1
00
2
01
3
02
4
03
5
04
6
05
7
06
8
07
9
08
10
09
11
0A
1
00
40
2
01
41
3
02
42
4
03
43
5
04
44
6
05
45
7
06
46
8
07
47
9
08
48
10
09
49
11
0A
4A
AC
cursor position
cursor position
Display position
DDRAM address
(hexadecimal)
Display position
DDRAM address
(hexadecimal)
For a 1-line display
For a 2-line display
Note: The cursor or blinking appears when the address counter (AC) selects the character
generator RAM (CGRAM). However, the cursor and blinking become meaningless.
The cursor or blinking is displayed in the meaningless position when the AC is a CGRAM address.
Figure 8 Cursor/Blink 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: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:未知廠家 功能描述:LCD Display Driver |
| HD66702RA00FL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66702RA01F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66702RA02F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-LCD CONTROLLER |
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