m37280eksp Mitsumi Electronics, Corp., m37280eksp Datasheet - Page 77

• Manufacturer Part Number: m37280eksp
• Description: Single-chip 8-bit Cmos Microcomputer With Closed Caption Decoder And On-screen Display Controller
• Manufacturer: Mitsumi Electronics, Corp.

The horizontal position is common to all blocks, and can be set in
256 steps (where 1 step is 4T
for display) as values “00
position register (address 00CF
is shown in Figure 12.11.12.
Fig. 12.11.12 Horizontal Position Register
Note : 1T
Fig. 12.11.13 Notes on Horizontal Display Start Position
Rev. 1.0
tween 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 1T
gap is 1.5T
H
C
SYNC
(T
Note 1
C
x x x x x x
Horizontal Position Register
: OSD clock cycle divided in pre-divide circuit) gap occurs be-
C
b7 b6 b5 b4 b3 b2 b1 b0
only when the character size is 1.5T
T
def
16
C
” to “FF
regardless of character sizes, however, the
4T
OSC
16
OSC
, T
). The horizontal position register
16
OSC
” in bits 0 to 7 of the horizontal
N
being the oscillating cycle
Notes 1. The setting value synchronizes with the V
1T
to
B
0
7
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
Horizontal position register (HP) [Address 00CF
1T
C
1.5T
1T
Control bits of horizontal
display start positions
(HP0 to HP7)
C
C
2. T
C
.
C
Tosc
Tdef
OSC
Tc
N
Name
M37280MF–XXXSP, M37280MK–XXXSP
: Value of horizontal position register (decimal notation)
: OSD clock cycle divided in pre-divide circuit
: OSD oscillation cycle
: 50 Tosc
= OSD oscillation period.
Block 1 (Pre-divide ratio = 1)
Block 2 (Pre-divide ratio = 2)
Block 3 (Pre-divide ratio = 3)
Block 4 (Pre-divide ratio = 2, character size = 1.5Tc)
Horizontal display start positions
4T
(setting value of high-order 4 bits
+setting value of low-order 4 bits
OSC
Functions
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
16
SYNC
]
16
16
0
1
.
)
After reset R W
M37280EKSP
0
R W
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