LC7872E Datasheet, PDF (15/17 Pages) Sanyo Semicon Device – CD Graphics Decoder

LC7872E
Register 3 (on/off settings for channels 8 to 15)
Data: lsb [ C C C C C C C C ] msb; Default: [ 0 0 0 0 0 0 0 0 ]
C = channel 8 to 15
0: off
1: on
Register 4 (BGC R and G setting)
Data: lsb [ R R R R G G G G ] msb; Default: [ 0 0 0 0 0 0 0 0 ]
Register 5 (BGC B setting)
Data: lsb [ B B B B - - - - ] msb; Default: [ 0 1 0 1 - - - - ]
Register 6 (chroma key color R and G settings)
Data: lsb [ R R R R G G G G ] msb; Default: [ 0 0 0 0 0 0 0 0 ]
Register 7 (chroma key color B setting)
Data: lsb [ B B B B - - - - ] msb; Default: [ 0 0 0 0 - - - - ]
Register 8 (burst phase setting, only valid when SON = 1)
Data: lsb [ F F - - - - - P ] msb; Default: [ 0 0 - - - - - 0 ]
Register 9 (YS and TRANS output timing)
Data: lsb [ T T T - - - - - ] msb; Default: [ 0 0 1 - - - - - ]
T = phase setting. The phase difference between YS and TRANS (the digital output) and the
video signal can be set to one of 8 levels from 0 to 7 in units of single 4FSC clock cycles. At a
value of 4 the phase is identical to that of the VIDEO pin.
Register 10 (External synchronization on/off, test mode)
Data: lsb [ T T T - - Y S R ] msb; Default: [ 0 0 0 - - - 0 0 ]
T = test mode setting
R = 0:Only the display area is moved
1:Motion also includes the border area (only left/right motion supported)
S = 0:Normal
1:Initializes the TLUT contents to all 0.*
Y = 0:Resets HRESET and VRESET when an external clock is used (SON = 1)
1:Resets VRESET when an external clock is used (SON = 1) (HRESET is not required)
Note: * In this state the define transparency command will not be accepted. (Return the system
to the S = 0 state.)
Register 11 (subtitle scrolling, vertical)
Data: lsb [ V V V V V - - - ] msb; Default: [ 0 0 0 0 0 - - - ]
This setting allows the subtitle screen display position to be scrolled in font height units.
V = vertical (up) scrolling distance (0 to 17 font height units)
Register 12 (subtitle scrolling, horizontal)
Data: lsb [ H H H H H H - - ] msb; Default: [ 0 0 0 0 0 0 - - ]
This setting allows the subtitle screen display position to be scrolled in font width units.
H = horizontal (left) scrolling distance (0 to 49 font width units)
Register 13 (TRANS setting, only valid when SON = 1)
Data: lsb [ B B B B B B - P ] msb; Default: [ 0 0 0 0 0 0 - 1 ]
P = 1: Enables the TRANS setting.
0: Invalid
(The whole screen is displayed and burst goes to the CDG side.)
B = the BGC TRANS value
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