MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
Notes 1 : 1TC (TC : OSD clock cycle divided by prescaler) gap oc-
2 : The horizontal start position is based on the OSD clock
source cycle selected for each block. Accordingly, when 2
blocks have different OSD clock source cycles, their hori-
zontal display start position will not match.
curs between the horizontal display start position set by
the horizontal position register and the most left dot of the
1st block. Accordingly, when 2 blocks have different pre-
divide ratios, their horizontal display start position will not
match.
Ordinaly, this gap is 1TC regardless of character sizes,
however, the gap is 1.5TC only when the character size is
1.5TC.
H
SYNC
1T
C
=
Block 1 (Pre-divide ratio = 1, clock source data slicer clock)
1T
C
4TOSC
✕N
=
Note 1
=
Block 2 (Pre-divide ratio 2, clock source data slicer clock)
1T
C
=
Block 3 (Pre-divide ratio = 3, clock source data slicer clock)
1.5T
C
Block 4 (Pre-divide ratio = 2, character size = 1.5Tc, clock source = data slicer clock)
Block 5 (Pre-divide ratio = 3, clock source = OSC1)
1T
C
4TOSC’
✕N
Note 2
N : Value of horizontal position register (decimal notation)
1Tc : OSD clock cycle divided in the pre-divide circuit
Tosc : OSD oscillation cycle
Fig. 73. Notes on Horizontal Display Start Position
73
RENESAS [ RENESAS TECHNOLOGY CORP ]
