Rev. 1.0, 02/00, page 851 of 1141
Bit 13
Interlaced/Noninterlaced Display Select Bit (LACEM): Selects interlaced or
noninterlaced text display mode. When noninterlaced text display is selected, the internally
generated Hsync and Vsync frequency can be modified. For details, refer to section 27.2.11,
Internal Sync Frequency Register (INFRQR).
Bit 13
LACEM
Description
0
Noninterlaced display is selected
(Initial value)
1
Interlaced display is selected
Bit 12
Blinking Period Select Bit (BLKS): Selects the character blinking period. The duty is
50%. The blinking period differs somewhat depending on the TV format selected by the TVM2 bit
of the OSD format register (either a 525-line system or a 625-line system).
DFORM
DCNTL
Bit 15
Bit 12
TVM2
BLKS
Description (Blinking Period)
0
Approx. 0.5 sec (32/fv = 0.53 sec)
(Initial value)
0
1
Approx. 1.0 sec (64/fv = 1.07 sec)
0
Approx. 0.5 sec (32/fv = 0.64 sec)
(Initial value)
1
1
Approx. 1.0 sec (64/fv = 1.28 sec)
Note:
fv is the vertical sync signal frequency.
Bit 11
OSD Display Start Bit (OSDON): Starts OSD display. When the OSD display start bit
is 0, the OSD internal display circuit stops operation. In conjunction with the OSD C.Video
display enable bit (bit 15), changes operation as follows. When accessing character data ROM
(OSDROM) from the CPU, this bit should always be cleared to 0. If this bit is set to 1, access by
the CPU is not guaranteed.
Bit 15
Bit 11
CDSPON
OSDON
Description
0/1
0
OSD display is stopped (C.Video output and digital output both off)
(Initial value)
0
1
OSD display is started (digital output only)
1
1
OSD display is started (both C.Video output and digital output
enabled)