參數(shù)資料
型號(hào)： UPD6465
廠商： NEC Corp.
英文描述： ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR
中文描述： 屏幕字符顯示的CMOS大規(guī)模集成電路的12線，24柱甲板型錄像機(jī)
文件頁數(shù)： 27/52頁
文件大?。?/td> 570K
代理商： UPD6465
μ
PD6464A,6465
27
4. ADJUSTING
This section describes how to adjust each circuit of the
μ
PD6464A, 6465. When performing adjustment, the
TEST pin (pin 19) must be connected to V
CC
.
4.1 Adjusting Oscillation Frequency
4.1.1 Adjusting
×
4 multiplier and crystal oscillation frequency
The
μ
PD6464A, 6465 generate the internal video signal by means of quadruple oscillation of 4f
SC
or crystal
oscillation.
The oscillation frequency of 4f
SC
can be output from the VSYO pin (pin 16) by using the test mode command.
Adjustment
Connect the TEST pin (pin 19) to V
CC
(normally, connect this pin to GND).
Input the following command. The quadrupled or crystal oscillation frequency will be output from the VSYO pin
(pin 16). To clear the test mode, either transfer the test mode clear command, or connect the TEST pin to GND.
In this case, the VSYO pin does not function as a vertical synchronization signal output pin.
Adjust the frequency with a capacitor (or coil), connected to XOSI pin (pin 12), shown in
8. APPLICATION CIRCUIT
DIAGRAM
using a frequency counter.
Crystal oscillation frequency output command (2-byte command)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1
0
1
1
0
0
0
0
0
0
1
1
1
1
1
1
4.1.2 Adjusting LC oscillation frequency (dot clock)
The
μ
PD6464A, 6465 create the dot clock of characters by means of LC oscillation.
The LC oscillation frequency can be output from the HSYO pin by using the test mode command, in the same
manner as when adjusting the crystal oscillation frequency described in 4.1.1.
Adjustment
Connect the TEST pin (pin 19) to V
CC
(normally, connect this pin to GND).
Input the following command. The LC oscillation frequency will be output from HSYO pin (pin 15). To adjust the
LC oscillation frequency, turn OFF display. When display is ON and while Hsync is low, oscillation is stopped and
the accurate oscillation frequency cannot be obtained (when using a frequency counter).
To clear the test mode, either transfer the test mode clear command, or connect the TEST pin to GND.
In this case, the HSYO pin does not function as a horizontal synchronization signal output pin.
Adjust the frequency with a trimmer capacitor (or coil), connected to OSC
IN
pin (pin 6) shown in
8. APPLICATION
CIRCUIT DIAGRAM
using a frequency counter.
LC oscillation frequency output command (2-byte command)
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
1
0
1
1
0
0
0
0
0
0
1
1
1
1
1
1
相關(guān)PDF資料
PDF描述
UPD6465CS ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR
UPD6465GT ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR
UPD6466 ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 24-COLUMN, CAMERA-CONTAINED VCR
UPD6466GS ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 24-COLUMN, CAMERA-CONTAINED VCR
UPD6466GT ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 24-COLUMN, CAMERA-CONTAINED VCR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD6465CS 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR
UPD6465GT 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS LSI FOR 12-LINE, 24-COLUMN DECK-TYPE VCR
UPD6465GT-101(A) 制造商:Renesas Electronics Corporation 功能描述:
UPD6465GT101-A 制造商:Renesas Electronics Corporation 功能描述:
UPD6466 制造商:NEC 制造商全稱:NEC 功能描述:ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 24-COLUMN, CAMERA-CONTAINED VCR
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