hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 96
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)
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HD66789
Rev.0.12, May 09 2003, page 96 of 156
Transition between the Internal Clock Operation Mode and RGB Interface Mode
Internal Clock Operation to RGB I/F (1)
Note: When switching into the RGB interface mode, the RGB
Wait more than 1 frame
RGB interface operation
Internal clock operation
RAM data write sequence through system interface in RGB-I/F mode
(DM1-0=01, RM=1)
interface signals, VSYNC, HSYNC, DOTCLK, and ENABLE,
must be input before the setting of DM1-0 and RM bits.
Writing RAM Data
HWM = 1, AM = 0
Address Setting
RGB I/F Setting
From RGB I/F (1) to RGB I/F (2)
setting (R22h)
Index resister setting (R22h)
Index resister
RGB I/F
RGB I/F mode setting
(DM1-0=01, RM=0)
Writing RAM Data
RGB I/F Operation
Address Setting
System I/F
HWM=1/0
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.
Display operation in
synchronization
with the RGB signal
RGB I/F (1) to Internal Clock Operation
Note: When switching into the internal clock mode from RGB I/F,
Internal clock mode setting
Wait more than 1 frame
Internal clock operation
(DM1-0 = 00, RM=0)
input for more than 1 frame after the mode has been switched.
keep RGB I/F signals (VSYNC, HSYNC, DOTCLK, ENABLE)
RGB I/F operation
From RGB I/F (2) to RGB I/F (1)
Index resister setting (R22h)
(DM1-0=01, RM=1)
Writing RAM Data
Address Setting
HWM=1, AM=0
RGB I/F mode
RGB I/F Operation
System I/F
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
Preliminary
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