hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 95
hd66789
Manufacturer Part Number
hd66789
Description
528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66789.pdf
(156 pages)
- Current page: 95 of 156
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HD66789
Notes to the external display interface
1.
Function
Partial display
Scroll function
Interlaced drive
Graphics operation function
2.
3.
4.
5.
6.
7.
8.
9.
Rev.0.12, May 09 2003, page 95 of 156
While an external display interface is selected, the following functions are not available.
The VSYNC, HSYNC, and DOTCLK signals must be supplied consecutively during display
operation through the RGB-I/F.
When setting NO1-0, SDT1-0, and EQ1-0 bits in the RGB-I/F mode, the reference clock is the
DOTCLK, not the internal operation clock.
In the 6-bit RGB-I/F mode, RGB (pixels) data are transmitted by three clocks. The data transmission,
therefore, should be made by RGB.
In the 6-bit RGB-I/F mode, the interface signals, VSYNC, HSYNC, DOTCL, ENABLE, VLD, and
PD17-0, should be set by RGB (pixels) in convenience for transmitting RGB pixels.
The transitions between the internal operation mode and external display interface should be made
according to the mode switching sequence below.
In the RGB-I/F mode, the front porch period continues after displaying one frame data until the next
VSYNC signal input.
In the RGB-I/F mode, the data must be written in the high-speed write mode (HWM = 1).
In the RGB-I/F mode, the address is set every frame on the falling edge of VSYNC.
Not available
Not available
Not available
Not available
External Display Interface
Internal Display Operation
Available
Available
Available
Available
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