HD66781 Datasheet, PDF (51/196 Pages) Renesas Technology Corp – 720-channel Source Driver for a-Si TFT/Low Temperature Poly-Si TFT Panels with 262,144-color display RAM

HD66781
Preliminary
External Display interface Control 1 (R00Ch)
R/W RS IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
W1
0
0
0
0
0
0
0 RM 0
0
DM DM
[1] [0]
0
0
RIM RIM
[1] [0]
RIM[1:0] Make settings for the RGB interface mode when the RGB interface is selected with DM and RM
bits. The setting must be made before the display through an external display interface. Do not make
changes to the setting during display.
Table 28
RIM[1:0]
RGB interface mode
Colors
2’h0
18-bit RGB interface (1 transmission/pixel)
262,144
2’h1
16-bit RGB interface (1 transmission/pixel)
65,536
2’h2
6-bit RGB interface (3 transmission/pixel)
262,144
2’h3
Setting disabled
-
Note 1) The instruction register setting is made only through a system interface.
Note 2) Data transfer and DOTCLK input must be by the RGB unit when a 6-bit RGB interface is
selected.
DM[1:0]: Set a display operation mode. An interface for display operation is selected by the DM setting.
DM allows switching between the internal clock operation mode and the external display interface mode.
Do not try to switch between the external interface modes (RGB-I/F and VSYNC-I/F).
Table 29
DM[1:0]
2’h0
2’h1
2’h2
2’h3
Display operation interface
Internal clock operation
RGB interface
VSYNC interface
Setting disabled-
RM: Set a RAM access interface. RAM access is made only through the interface specified by the RM
setting. Set RM to 1 when writing display data through the RGB interface. This setting is valid
irrespective of the display operation mode. Changes in display data can be made by setting RM to 0, which
enables RAM data overwrite through a system interface, even while the screens are displayed through the
RGB interface mode.
Table 30
RM
Display operation interface
0
Internal clock operation/VSYNC interface
1
RGB interface
Rev.0.5, July.31.2003, page 51 of 196