hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 38

• 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.

D1-0
HD66789
D1
Note 1) Data are written to GRAM from the microcomputer irrespective of the setting of D1-0 bits.
Note 2) In the standby mode, D1-0 = "00". However, the D1-0 register setting before entering standby
Display Control 2 (R08h)
FP3-0/BP3-0: Make settings for blank periods (the front and back porches), which are placed at the
beginning and end of the display. FP3-0 and BP3-0 bits specify the number of raster-rows for the front and
back porch respectively. When making this setting, make sure:
In the external display interface mode, the back porch (BP) starts on the falling edge of VSYNC signal,
followed by display operation. After displaying the number of raster-rows set with NL bits, the front porch
starts. After the front porch, a blank period ensues until an input of next VSYNC signal.
Rev.0.12, May 09 2003, page 38 of 156
0
0
1
1
R/W
BP + FP = <16 raster-rows
FP >= 2 raster-rows
BP >= 2 raster-rows
W
modes is retained.
D0
0
1
0
1
RS
1
IB15 IB14 IB13 IB12 IB11 IB10 IB9
Source Output
GND
GND
Unlit display
Display
0
0
0
0
FP3
HD67789
Internal Operations
Halt
Operate
Operate
Operate
FP2 FP1
IB8
FP0
IB7
0
Gate-Driver Control Signals
(CL1, FLM, and M)
Halt
Operate
Operate
Operate
IB6
0
IB5
0
IB4
0
IB3
BP3 BP2
IB2
Preliminary
IB1
BP1 BP0
IB0