Renesas SH7781 - Manual (Page 987)

19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 957 of 1658
REJ09B0261-0100
Table 19.13 Variables Defined in Display Screen
Variables Contents Units
hc* 1 Horizontal scan period Dot clock
hsw Horizontal sync pulse width Dot clock
xs From rise of
HSYNC to display start position in the
horizontal direction of the display screen
Dot clock
xw Display width per 1 raster of display screen Dot clock
vc* 2 Vertical scan period Raster line
vsw Vertical sync pulse width Raster line
ys From rise of
VSYNC to display start position in the
vertical direction of the display screen
Raster line
yw Vertical display period of display screen Raster line
Notes: 1. Should be set such that hsw + xs + xw < hc + 18 (decimal)
2. Should be set such that vsw + ys + yw < vc
The display timing generation register settings are different depending on the scan method and
synchronization method. Hence the value of the display timing generation register should be set
after performing calculations like those indicated in Table 19.14.