參數(shù)資料
型號： HD66766R
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點圖形LCD控制器/驅(qū)動器的65K色
文件頁數(shù)： 46/97頁
文件大?。?/td> 681K
代理商： HD66766R
HD66766R Rev. 1.0-1 / September 2002
46
High-Speed Burst RAM Write Function
The HD66766R has a high-speed burst RAM-write function that can be used to write data to RAM in
one-fourth the access time required for an equivalent standard RAM-write operation. This function is
especially suitable for applications that require the high-speed rewriting of the display data, for example,
display of color animations, etc.
When the high-speed RAM-write mode (HWM) is selected, data for writing to RAM is once stored to the
HD66766R internal register. When data is selected four times per word, all data is written to the on-chip
RAM. While this is taking place, the next data can be written to an internal register so that high-speed
and consecutive RAM writing can be executed for animated displays, etc.
Figure 33 Flow of Operation in High-Speed Consecutive Writing to RAM
Figure 34 Example of the Operation of High-Speed Consecutive Writing to RAM
48
Address
counter
(AC)
16
Microcomputer
16
GRAM
"0000"H
"0002"H
"0003"H
"0001"H
Resistor 1
Resistor 2
Resistor 3
Resistor 4
CS*
(input)
DB15-0
(input / output)
RAM write data
(48 bit)
RAM address
(AC15 to 0)
“0000”H
“0004”H
“0008”H
“000A”H
RAM data 1 to 4
RAM data 5 to 8
RAM data 9 to 12
Index
(R22)
RAM
data
(1)
RAM
data
(2)
R4M
data
(3)
RAM
data
(4)
RAM
data
(5)
RAM
data
(6)
RAM
data
(7)
RAM
data
(9)
RAM
data
(8)
RAM
data
(11)
RAM
data
(10)
RAM
data
(12)
RAM write
execution time
RAM write
execution time
RAM write
execution time *
Index
(R22)
1
2
3
4
1
2
3
4
1
2
3
4
* The lower two bits of the address must be set in the following way in high-speed write mode.
When D0 becomes 0, the lower two bits of the address must be set to “11”.
Wen D1 becomes 1, the lower two bits of the address must be set to “00”.
Note: When a high-speed RAM write is canceled, the next instruction must only be
executed after the RAM write execution time has elapsed.
相關(guān)PDF資料
PDF描述
HD667A66R 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
HD667B66R 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors
HD66780FH LAMPS, STACKABLE INDICATOR
HD66780FS Dot Matrix Liquid Crystal Display Controller and Driver
HD66780 Dot Matrix Liquid Crystal Display Controller and Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66773R 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:262,144-color, 132 x 176-dot Graphics Controller Driver for TFT LCD panels
HD66780 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller and Driver
HD66780FH 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller and Driver
HD66780FS 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller and Driver
HD66781 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM
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