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參數(shù)資料
| 型號(hào)： | HD66787 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | 528-channel, One-chip Driver with 262,144-color Display RAM and Power Supply Circuit for Low-temperature Poli-Si TFT (LTPS-TFT) Panels with Incorporat |
| 中文描述： | 528與262,144色顯示RAM和低電源電路通道，單芯片驅(qū)動(dòng)器的溫度和旋鈴聲非晶硅TFT（薄膜晶體管）與Incorporat小組 |
| 文件頁(yè)數(shù)： | 62/159頁(yè) |
| 文件大?。?/td> | 1607K |
| 代理商： | HD66787 |
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HD66787
Preliminary
Rev.0.22, May.23.2003, page 62 of 159
RAM Access through RGB-I/F and System I/F
The HD66787 writes all display data on the panels to the internal RAM. This enables the transfer of only
the data for the moving picture area as well as for the frames for updating screens through the RGB
interface. By writing data in the high speed write mode (HWM = 1) and with the window address function,
the HD66787 enables the high-speed access to RAM with low power consumption while displaying
moving pictures. In the frames other than the moving picture screen update, the display data in the area
other than the moving picture area can be updated through a system interface.
The RAM access is also possible through a system interface even in the RGB-I/F mode. In the RGB
interface mode, data are written to RAM in synchronization with the DOTCLK during ENABLE = “Low”.
When writing data in the RGB-I/F mode through the system interface, it is necessary to set the ENABLE
“High” to stop writing through the RGB interface. After accessing to RAM through the system interface,
wait an enough time for the write/read bus cycle before starting accessing to RAM through the RGB
interface. When RAM accesses through the RGB and system interfaces conflict, there will be no guarantee
that data are properly written to RAM.
Updating
(both panels)
VSYNC
ENABLE
DOTCLK
PD17-0
Index
R22
RM=0
Setting
of
address
Index
R22
Updating of area
other than moving
picture area
RM=1
Setting
of
address
Index
R22
Updating still picture area*1
Updating or moving
picture area
Updating or moving
picture area
System interface
Setting of index
Note 1) When RGB-I/F is selected, the address setting is made at every falling edge of VSYNC.
Note 2) The address set and the index set must be made before the RAM access throught the RGB interface.
Note 3) The high-speed write mode should be used in RGB-I/F and VSYNC-I/F modes.
Moving picture area
2001/01/01 00:00
Still picture area
Updating
(both panels)
Updating Still Picture Area during Displaying a Moving Picture
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD66840 | Peripheral IC |
| HD66840F25 | LCD Controller |
| HD66840F30 | LCD Controller |
| HD66841FP | LCD Controller |
| HD66841FS | LCD Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD66789 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit |
| HD667A66R | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:132 x 176-dot Graphics LCD Controller/Driver for 65K Colors |
| HD667B66R | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:132 x 176-dot Graphics LCD Controller/Driver for 65K Colors |
| HD66840 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| HD66840F25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Controller |
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