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LC74788 Folha de dados(PDF) 15 Page - Sanyo Semicon Device

Nome de Peças LC74788
Descrição Electrónicos  On-Screen Display Controller
PDF  23 Pages
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Fabricante Electrônico  SANYO [Sanyo Semicon Device]
Página de início  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC74788 Folha de dados(HTML) 15 Page - Sanyo Semicon Device

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DA
Register
Contents
Notes
0 to 7
State
Function
7
—
1
6
—
1
Command 6 identification code.
5
—
1
Sets up synchronizing signal control.
4
—
0
3
SEL0
0
1
2
MOD0
0
1
1
DISLIN
0
12 lines
Switches the number of lines displayed
1
10 lines
0
MUT
0
Normal output
CVOUT switching
1
CVIN is cut and CVOUT is held at the pedestal level.
SEL0
MOD
SEPOUT output
0
0
Sync separator signal
0
1
Low-level output
1
0
High-level output
1
1
ST pulse signal
No. 5731-15/23
LC74788, 74788M, 74788JM
COMMAND6 (Synchronizing signal detection setup command)
• First byte
Switches the SEPOUT (pin 19) output
• Second byte
DA
Register
Contents
Notes
0 to 7
State
Function
7
—
0
Second byte identification bit
6
RN2
0
1
5
RN1
0
1
4
RN0
0
1
3
SN3
0
1
2
SN2
0
1
1
SN1
0
1
0
SN0
0
1
Note: All registers are set to 0 when the LC74788/M/JM is reset by the RST pin.
External synchronizing signal detection control.
Signal absent
→ signal present transition detection
Sets the sampling period in which SYNC can be
detected continuously in the horizontal synchronizing
signal period (1H).
External synchronizing signal detection control.
Signal present
→ signal absent transition detection
Sets the sampling period in which SYNC cannot be
detected continuously in the horizontal synchronizing
signal period (1H).
RN2
RN1
RN0
Number of times HSYNC detected
0
0
0
0 times
0
0
1
4 times
0
1
0
8 times
1
0
0
16 times
SN3
SN2
SN1
SN0
Number of times HSYNC detected
0
0
0
0
Not detected
0
0
0
1
32 times
0
0
1
0
64 times
0
1
0
0
128 times
1
0
0
0
256 times



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