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参数资料
| 型号： | LC74798M |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDSO30 |
| 封装： | 0.375 INCH, MFP-30 |
| 文件页数： | 5/32页 |
| 文件大小： | 322K |
| 代理商： | LC74798M |
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No. 5833-13/32
LC74798, 74798M
Note: All registers are set to 0 when the LC74798/M is reset by the RST pin.
Second byte
DA
Register
Contents
Notes
0 to 7
State
Function
7—
0Second byte identification bit
6RSHLV2
0
Background color level 1 (level that is different from blue)
1
Background color level 2 (level that is identical to the blue level)
5HLFINT
0Normal mode
1
Partial internal synchronization mode
4
BCL
0Background color on
1No background color (Only the background level is set)
3CB
0
Color burst signal output
1Color burst signal output stopped
2
PH2
0
1
PH1
0
1
0
PH0
0
1
Only valid in internal synchronization mode
Only valid when BCL is high
Background color specification
*: When 2fsc is used.
Switches the background color signal level
COMMAND5 (Display control setup command)
First byte
DA
Register
Contents
Notes
0 to 7
State
Function
7—
1
6—
1
5—
0
4—
1
3
NP1
0NTSC
1PAL
2
NP0
0
525 lines
1
625 lines
1
NON
0Interlaced
1Noninterlaced
0INT
0External synchronization
1
Internal synchronization
Command 5 identification code.
Display control setup.
Switches between NTSC and PAL
Modified by the external input signal V
Switches between interlaced and noninterlaced
video
Switches between external and internal
synchronization
PH2
PH1
PH0
Background color (phase)
000
Cyan*
00
1Yellow*
010
Red*
011
Blue*
10
0Cyan blue
10
1Green*
11
0Orange
11
1Magenta*
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