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參數(shù)資料
| 型號： | HD66726 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器) |
| 中文描述： | 圖形液晶顯示控制器/鍵掃描功能（帶鍵掃描功能的圖形液晶顯示控制器/驅(qū)動器驅(qū)動程序） |
| 文件頁數(shù)： | 32/117頁 |
| 文件大小： | 1549K |
| 代理商： | HD66726 |
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HD66726
32
Programming Character Patterns
This section explains the correspondence between addresses and data used for program character patterns
in EPROM.
Programming to EPROM:
The HD66726 character generator ROM can generate 432 6
×
8-dot character
patterns. Table 16 shows the correspondence between the EPROM address, data, and the character pattern.
Table 16
Examples of Correspondence between EPROM Address, Data, and Character Pattern
(6
×
8 Dots)
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
0
1
1
0
1
0
1
1
1
0
0
0
0
0
0
0
0
1
0 1
0 1
0 1
0
0
0
0
0
0 1
0 1
0 1
1
0
0
0
0
O
4
O
3
O
2
O
1
O
0
0
0
0
0
0
0
Character code
Line position
EPROM Address
Data
LSB
MSB
O
5
A
11
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A
12
0
ROM
bit
Notes: 1. EPROM address: Bit A12 corresponds to the CGROM memory bank switch bit ("ROM").
2. EPROM address: Bits A11 to A4 correspond to a character code.
3. EPROM address: Bits A2 to A0 specify the line position of the character pattern.
EPROM address: Bit A3 must be set to 0.
4. EPROM data: Bits O5 to O0 correspond to character pattern data.
5. Areas which are lit (indicated by shading) are stored as 1, and unlit areas as 0.
6. The eighth raster-row is also stored in the CGROM, and must also be programmed. If the eighth
raster-row is used for a cursor, this data must all be set to zero.
7. EPROM data: Bits O7 to O6 are invalid. 0 must be written in all bits.
Handling Unused Character Patterns:
1. EPROM data outside the character pattern area: This is ignored by character generator ROM for display
operation so any data is acceptable.
2. EPROM data in CGRAM area: Always fill with zeros.
3. Treatment of unused user patterns in the HD66726 EPROM: Depending on to the user application,
these are handled in either of two ways:
a. When unused character patterns are not programmed: If an unused character code is written into
DDRAM, all its dots are lit, because the EPROM is filled with 1s after it is erased.
b. When unused character patterns are programmed as 0s: Nothing is displayed even if unused
character codes are written into DDRAM. (This is equivalent to a space.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD66727 | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動器) |
| HD66728 | 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點圖形LCD控制器) |
| HD66730 | Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅(qū)動器) |
| HD66731 | Dot-Matrix Liquid Crystal Display Controller/Driver(點陣液晶顯示控制器/驅(qū)動器) |
| HD66731A00TB0L | 122 x 32 pixel format, Compact LCD size |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66726A03TB0L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| HD66727 | 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 |
| HD66727A03 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66727A03BP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
| HD66727A03TA0 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver |
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