HD66781 Datasheet, PDF (93/196 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
Preliminary
VLE: When VLE = 1, settings for the vertical scroll display is made valid. The start line is displayed
according to the VL[8:0] setting. The raster-rows that display a base image are scrolled by the number of
lines set by VL bits. OSD area is not affected by the base-picture scrolling. This function is not available
while external display interface is selected. While external display interface is selected, make sure that
VLE= 0.
Table 51
VLE
Base image
0
Fixed display
1
Scrolling display
Note 1) Scroll function is not available during the interlaced drive (FLD = 2’h3)
BSA[8:0]/BEA[8:0]: Set the start line address (BSA) and the end line address (BEA) of the base image
display RAM area.
Display RAM data from the one set at BSA bits from the first line. Make sure that base image display
RAM area (BSA/BEA) is equal to or more than the number of raster-rows driving a panel (= NL ≤ BSA –
BEA). In case of BSA – BEA ≤ NL, outside the base image area becomes non-lit display.
VL[8:0] Set the number of raster-rows that are scrolled for a base image. The numbers of raster-rows set
by VL bits are scrolled within the base image.
ESA[8:0]/EEA[8:0] Set the start line address (ESA) and the end line address (EEA) of the area which is
magnified in the base image display RAM area.
A base image in the area specified with ESA and EEA is magnified on display. Make sure that
BSA ≤ ESA ≤ EEA ≤ BEA. A magnified base image is not available with the scrolling function.
Table 52 Liquid crystal drive raster-rows
NL[5:0]
6’h00
6’h01
6’h02
6’h03
6’h04
6’h05
6’h06
6’h07
6’h08
6’h09
6’h0A
6’h0B
6’h0C
6’h0D
6’h0E
6’h0F
6’h10
6’h11
6’h12
6’h13
Number of raster-rows
Setting disabled
16
24
32
40
48
56
64
72
80
88
96
104
112
120
128
136
144
152
160
NL[5:0]
6’h14
6’h15
6’h16
6’h17
6’h18
6’h19
6’h1A
6’h1B
6’h1C
6’h1D
6’h1E
6’h1F
6’h20
6’h21
6’h22
6’h23
6’h24
6’h25
6’h26
6’h27
Number of raster-rows
168
176
184
192
200
208
216
224
232
240
248
256
264
272
280
288
296
304
312
320
Rev.0.5, July.31.2003, page 93 of 196