HD66781 Datasheet, PDF (36/196 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
Driver Output Control (R001h)
Preliminary
R/W RS
W1
IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
0 0 0 ^LT 0 0 0 SS 0 0 0 0 0 0 0 0
PS
LTPS: Select the type of a panel. The output waveforms from SFTCLK1, 2 vary according to the setting
of the panel. When LTPS = 0, a-Si TFT panel waveforms are output. When LTPS = 1, low temperature
poly-Si TFT panel waveforms are output. See SFTCLK waveforms (p.67) for detail.
Make a setting for this register when D[1:0] = 2’h0.
SS: Select the correspondence between RAM write address and source driver output.
SS = “0”: data written in H’00000 is output from S1.
SS = “1”: data written in H’00000 is output from S720.
For details, see “GRAM Address Map”.
By making settings for both SS and RGB bits, the assignment of RGB dots to the S1 ~ S720 pins is
determined.
When SS = 0 and BGR = 0, R, G, B are assigned interchangeably in this order from S1 to S720.
When SS = 1 and BGR =1, R, G, B are assigned interchangeably in this order from S720 to S1.
Changes in the SS and BGR settings require RAM data rewrite.
LCD Driving Wave Control (R002h)
R/W RS
W1
IB15 IB14 IB13 IB12 IB11 IB10 IB9 IB8 IB7 IB6 IB5 IB4 IB3 IB2 IB1 IB0
0 0 0 0 FLD1 FLD0 B/C EOR 0 0 NW5 NW4 NW3 NW2 NW1 NW0
NW[5:0]: Specify “n”, the number of raster-rows from 1 to 64, to alternate every n+1 raster-rows when C-
pattern waveform is generated (B/C = 1).
EOR: When EOR = 1, alternations occur by applying EOR (exclusive OR) operation to an odd/even frame
select signal and an n-raster-row inversion signal while a C-pattern waveform is generated (B/C =1). This
instruction is used when liquid crystal alternate drive is not available due to a combination of numbers of
LCD raster-rows and the value of “n”. For details, see “n-raster-row inversion Alternate drive”(p.174).
B/C: When B/C =0, field alternating waveforms are generated. Alternation occurs every frame to drive
liquid crystal. When B/C=1, alternation occurs every n raster-rows. For details, see the “n-raster-row
Inversion alternating Drive” section.
Rev.0.5, July.31.2003, page 36 of 196