m37280eksp Mitsumi Electronics, Corp., m37280eksp Datasheet - Page 75

• 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 display position in the vertical direction is determined by count-
ing the horizontal sync signal (H
H
rising edge (falling edge) of H
rising edge (falling edge) of V
(falling edge) of V
signal needs enough time (2 machine cycles or more) for avoiding
jitter. The polarity of H
I/O polarity control register (address 0217
Fig. 12.11.9 Supplement Explanation for Display Position
Rev. 1.0
SYNC
are positive polarity (negative polarity), it starts to count the
SYNC
SYNC
signal to rising edge (falling edge) of H
SYNC
and V
SYNC
SYNC
Notes 1 : The vertical position is determined by counting falling edge of
V
V
signal in
microcomputer
Period of counting
H
H
signal input
When bits 0 and 1 of the I/O polarity control register
(address 0217
signal. So interval from rising edge
SYNC
SYNC
SYNC
SYNC
SYNC
8 machine cycles
or more
signal from after fixed cycle of
). At this time, when V
2 : Do not generate falling edge of H
3 : The pulse width of V
signal input
control
signal
signals can select with the
16
of V
or more.
H
microcomputer.
).
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
SYNC
SYNC
16
) are set to “1” (negative polarity)
signal after rising edge of V
control signal in microcomputer to avoid jitter.
M37280MF–XXXSP, M37280MK–XXXSP
SYNC
(Note 2)
SYNC
SYNC
and
8 machine cycles or more
1
Not count
( at f(X
and H
0.25 to 0.50 [ s]
2
SYNC
IN
3
SYNC
) = 8MHz)
SYNC
needs 8 machine cycles
4
signal near rising edge
control signal in the
5
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M37280EKSP
75