m52347sp Mitsumi Electronics, Corp., m52347sp Datasheet - Page 11

• Manufacturer Part Number: m52347sp
• Description: Sync Signal Processor
• Manufacturer: Mitsumi Electronics, Corp.

3) Polarity detection and non-input detection (pins
4) V S/S IN (pin
2. Clamp Pulse
1) Clamp pulse width
2) Clamp pulse position
11
External capacitance is required as a filter pin to detect polarity
and non-input. As the value is larger, the ripple is smaller and
less malfunction occurs. However, the response speed for
detection is lower. A sufficient external capacitance is 0.05 F
with input of 15 kHz and 10 uF with input of 60 kHz. However,
check the frequency of the input signal in use and the filter pin
waveform with the duty ratio conditions, and then check that the
value is 3.1V or more (2.8V in capability) with positive polarity
input and 1.9V or less (2.2V in capability) with negative polarity
input.
Input a signal of having externally integrated composite sync for
V sync separation.
Composite sync input into pin
is externally integrated and is input into pin
separation. With the waveform at pin
element has been fully dropped.
The threshold levels of sync separation, given hysteresis, are
3.5V and 1.8V.
CLAMP TIMING (Pin
The clamp pulse width is determined by the external resistance
and the capacitance. As the resistance value and capacitance
value are larger, the clamp pulse width is wider.
The time constant is determined by the current flowing out of pin
at pin
value. When the external resistance is 4.3
the external capacitance is 220 pF, the pulse width is 0.4 usec.
CLAMP SW (pin
When pin
trailing edge results in occurrence of a clamp pulse. When pin 3
is 'H", and only GREEN is input, clamp pulse occurs at the
trailing edge. A clamp pulse also occurs at the leading edge
20
Input waveform at
Output waveform at
Waveform at
pin
pin
pin
and the capacitance value of the timing pin. The flow current
11
13
6
20
is determined by the pin voltage and external resistance
3
11
is "M" or "L", fixing a higher-priority signal to the
)
3
)
20
)
6
is output to pin
V
V
TH
TH
=1.8V
=3.5V
11
, check that the H
(that is 700 uA) and
7
12
11
and
. Output at
for V sync
8
)
12
3. Sampling Pulse from VD Portion
when COMP/H only is input or when both COMP/H and GREEN
are input.
V TIME GATE SW (Pin
Whether to output the pulse of VD portion from pins
can be selected. When pin
portion is output. When pin
is not output.
Output at pin
Output at pin
Output at pin
Output at pin
8
6
4
2
0
Clamp Timing Capacitance at Pin
10
14
14
15
15
SYNC SIGNAL PROCESSOR
when the pin
when pin
when pin
when pin
10
MITSUBISHI ICs (Monitor)
)
VD portion
VD portion
10
10
100
M52347SP/FP
is "L", the pulse of the VD portion
is "H" or OPEN, pulse of the VD
10
10
10
is "L"
is "H" or OPEN
is "L"
10
is "H" or OPEN
1000
R=4.3k
R=10k
20
(pF)
14
and
15