HD66781 Datasheet, PDF (49/196 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
Display Control 4 (R00Bh)
Preliminary
R/W RS
W1
IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
0 ^{FRC D16} 0 0
0
0
00
0
0
00
0 ^{COL COL}
ON B
10
FRCON: Make a setting for the FRC mode. Control on and off of the FRC mode.
D16B: When FRCON=1, the FRC mode sets in. When COL[1:0]=2’h1 and the low-power display mode,
where only 32 operational amplifiers are used, the FRC mode enables display with abundant colors. For
details, see “low-power display mode”(p.169).
Set D16B to 1 when using a 16-bit interface (one-transfer 16-bit interface, 2-transfer 8-bit interface, 16-bit
SPI, RGB interfaces).
Table 25
Interface mode
FRCON D16B
Colors
18-bit, 16-bit x2, 9-bit x2, 8-bit x3,
0
*
262,144
RGB 18-bit, 6-bit x3
1
0
250,047
16-bit x1, 8-bit x2, SPI
0
*
65,536
1
1
64,512
Note 1) When the FRC mode is on, do not switch the interface mode settings (M, TRI, D16B registers)
Note 2) When the FRC mode is on, 18-bit format data and 16-bit format data are not displayed
simultaneously.
COL[1:0]: When COL=2’h1, 32 grayscale operational amplifiers are halted. When making a setting, it
must follow the setting sequence in the “Low Power Consumption Display Mode” section.
When COL = 2’h2, 8-color mode sets in. When making a setting, it must follow the setting sequence in the
“8-Color Display Mode” section. All operational amplifiers except V0 and V63 levels are halted for low
power consumption display.
Table 26
COL[1:0] Amplifiers in operation Available colors for display
FRCON = 0
FRCON = 1
2’h0
64
262,144 colors/65,536 colors
-
2’h1
32
32,768 colors
250,047 colors/64,512 colors
2’h2
2
8 colors
-
2’h3
Setting disabled
Setting disabled
Setting disabled
Note 1) When COL[1:0] =2’h1 and FRCON = 0, do not write data that correspond to the grayscale levels the
amplifiers of which are halted.
Rev.0.5, July.31.2003, page 49 of 196