HD66789 Datasheet, PDF (96/156 Pages) Renesas Technology Corp – 528-channel, One-chip Driver for Amorphous TFT Panels with 262,144-color display RAM, Power Supply Circuit, and Gate Circuit

HD66789
Preliminary
Internal Clock Operation to RGB I/F (1)
RGB I/F (1) to Internal Clock Operation
Internal clock operation
HWM = 1, AM = 0
Address Setting
RGB I/F Setting
(DM1-0=01, RM=1)
Index resister
setting (R22h)
Wait more than 1 frame
RGB I/F
Writing RAM Data
RGB interface operation
RGB I/F operation
Display operation
in synchronization with
the internal clock
The value set in DM1-0 and RM
become valid after the completion
of 1-frame display.
Internal clock mode setting
(DM1-0 = 00, RM=0)
Wait more than 1 frame
Internal clock operation
Display operation in
synchronization with the RGB
signals ( VSYNC , HSYNC,
DOTCLK)
The value set in DM1-0 and RM bits
become valid after the completion of
1-frame display.
Display operation
in synchronization with
the internal clock
Display operation in
synchronization
with the RGB signal
Note: When switching into the internal clock mode from RGB I/F,
keep RGB I/F signals (VSYNC, HSYNC, DOTCLK, ENABLE)
input for more than 1 frame after the mode has been switched.
Note: When switching into the RGB interface mode, the RGB
interface signals, VSYNC, HSYNC, DOTCLK, and ENABLE,
must be input before the setting of DM1-0 and RM bits.
Transition between the Internal Clock Operation Mode and RGB Interface Mode
From RGB I/F (1) to RGB I/F (2)
From RGB I/F (2) to RGB I/F (1)
RGB I/F Operation
RGB I/F mode setting
(DM1-0=01, RM=0)
HWM=1/0
Address Setting
System I/F
Writing RAM Data
HWM=1, AM=0
Address Setting
Index resister setting (R22h)
System I/F
Writing RAM Data
RGB I/F mode
(DM1-0=01, RM=1)
Index resister setting (R22h)
RGB I/F Operation
RAM data write sequence through system interface in RGB-I/F mode
Rev.0.12, May 09 2003, page 96 of 156