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LC74789M View Datasheet(PDF) - SANYO -> Panasonic

Part NameDescriptionManufacturer
LC74789M On-Screen Display Controller SANYO
SANYO -> Panasonic SANYO
LC74789M Datasheet PDF : 23 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Pin Assignment
LC74789, 74789M, 74789JM
Pin Functions
A08696
Pin No.
1
2
Pin Name
VSS1
XtalIN
3
XtalOUT
(MUTE)
Function
Ground
Crystal oscillator
(MUTE input)
CTRL1 Crystal oscillator input switching
4
(CHABLK)
(CHABLK output)
5 HFTONOUT
6
OSCIN
7
OSCOUT
Background line output
LC oscillator
External synchronizing signal
8
SYNCJDG
judgment output
9
CS
10
SCLK
11
SIN
12
VDD2
Enable input
Clock input
Data input
Power supply
Notes
Ground connection (digital system ground)
These pins are used either to connect the crystal and capacitors used to form an external
crystal oscillator circuit to generate the internal synchronizing signals, or to input an external
clock signal (2fsc or 4fsc). As a mask option, the XtalOUT pin can be set to function as the
MUTE input pin. When this pin is set low, the video output is held at the pedestal level. (A pull-
up resistor is built in and the input has hysteresis characteristics.)
Switches the mode between external clock input and crystal oscillator operation. A low level
selects crystal oscillator operation and a high level selects external clock input. As a mask
option, the CTRL1 input pin can be set to function as the CHABLK (character · frame) output.
This is a 3-value output.
Outputs the range signal specified by LNA*, LNB*, and LNC*. Outputs the crystal oscillator
clock when RST is low. (This signal is not output after a reset command is executed.)
Connections for the inductor and capacitor that form the character output dot clock generation
oscillator
Outputs the state of the external synchronizing signal presence/absence judgment. Outputs a
high level when synchronizing signals are present.
Outputs the dot clock (LC oscillator) when RST is low. (This signal is not output on command
resets.)
Serial data input circuit enable pin. Serial data input is enabled when a low level is input.
A pull-up resistor is built in. (This input has hysteresis characteristics.)
Serial data input circuit clock input.
A pull-up resistor is built in. (This input has hysteresis characteristics.)
Serial data input.
A pull-up resistor is built in. (This input has hysteresis characteristics.)
Composite video signal level adjustment power supply (analog system power supply)
Continued on next page.
No. 5732-2/23
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