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參數資料
| 型號： | LC74788 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | On-Screen Display Controller(屏幕顯示控制器) |
| 中文描述： | 屏幕顯示控制器（屏幕顯示控制器） |
| 文件頁數： | 2/23頁 |
| 文件大小： | 210K |
| 代理商： | LC74788 |
Pin Assignment
No. 5731-2/23
LC74788, 74788M, 74788JM
Pin Functions
Pin no.
Pin
Function
Notes
1
V
SS
1
Xtal
IN
Ground
Ground connection (digital system ground)
2
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.)
Crystal oscillator
(MUTE input)
Xtal
OUT
(MUTE)
3
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.
4
CTRL1
(CHABLK)
Crystal oscillator input switching
(CHABLK output)
5
HFTON
OUT
Background line 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.)
6
OSC
IN
OSC
OUT
LC oscillator
Connections for the inductor and capacitor that form the character output dot clock generation
7
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.)
8
SYNC
JDG
External synchronizing signal
judgment output
9
CS
Enable input
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.)
10
SCLK
Clock input
Serial data input circuit clock input.
A pull-up resistor is built in. (This input has hysteresis characteristics.)
11
SIN
Data input
Serial data input.
A pull-up resistor is built in. (This input has hysteresis characteristics.)
12
V
DD
2
Power supply
Composite video signal level adjustment power supply (analog system power supply)
Continued on next page.
A08688
LC74788
LC74788M
LC74788JM
相關PDF資料 |
PDF描述 |
|---|---|
| LC74789JM | On-Screen Display Controller |
| LC74789N | LC74789N |
| LC74789 | On-Screen Display Controller(屏幕顯示控制器) |
| LC74792 | VPS / PDC Slicer IC |
| LC74792JM | VPS / PDC Slicer IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LC74788JM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:On-Screen Display Controller |
| LC74788M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:On-Screen Display Controller |
| LC74788N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LC74789 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:On-Screen Display Controller |
| LC74789-9810-E | 制造商:ON Semiconductor 功能描述:ON-SCREEN DISPLAY CONTROL - Ammo Pack 制造商:ON Semiconductor 功能描述:FNFLD / ON-SCREEN DISPLAY CONTROL |
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