參數(shù)資料
型號： HD667B66R
廠商： Hitachi,Ltd.
英文描述： 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
中文描述： 132 × 176點(diǎn)圖形LCD控制器/驅(qū)動器的65K色
文件頁數(shù)： 51/97頁
文件大?。?/td> 681K
代理商： HD667B66R
HD66766R Rev. 1.0-1 / September 2002
51
Graphic Operation Function
The HD66766R can greatly reduce the load of the microcomputer graphics software processing through
the 16-bit bus architecture and internal graphics-bit operation function. This function supports the
following:
1.
A write data mask function that selectively rewrites some of the bits in the 16-bit write data.
2.
A conditional write function that compares the write data and compare-bit data and writes the data sent
from the microcomputer only when the conditions match. Even if the display size is large, the display
data in the graphics RAM ( GRAM ) can be quickly rewritten. The graphics bit operation can be
controlled by combining the entry mode resister. The bit set value of the RAM-write –data mask resister,
and the write from the microcomputer.
Table 33 Graphics operation
Figure 37 Graphics Operation flow
16
+1/-1
16
Microcomputer
Write data latch
Logical / compare operation (LG2 - 0:)
000: replacement bit
.
110: replacement with matched write,
111: replacement with unmatched write
Write bit mask
Graphic RAM ( GRAM )
Logical operation bit
( LG2 - 0 )
Compare bit ( CP7 - 0 )
Write mask register
( WM15 - 0 )
Address
counter
( AC )
+ 256
Bit Setting
I/D AM LG2-0 Operation and Usage
Operation Mode
Write mode 1
Horizontal data replacement, horizontal - border drawing
Write mode 2
Write mode 3
Write mode 4
Vertical data replacement, vertical - border drawing
Conditional horizontal data replacement, horisontal - border drawing
Conditional vertical data replacement, vertical - border drawing
0 /1
000
0 /1
0 /1
0 /1
0
1
0
1
000
110,111
110,111
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