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1.6.15
Oscillation circuit
The crystal oscillator X100 is connected to the MPU IC101 pin 45 and pin 44. Pin 45 is the
clock input, and pin 44 is the amplification circuit output in the MPU. The operation frequency
of the crystal oscillator is 24MHz. The basic clock is divided in the MPU to operate the pro-
gram and circuits of the MPU.
1.7
Software
1.7.1
Outline
(1) Input frequency
•Horizontal
: 30kHz to 121kHz (Lower limit : 29.5kHz, Upper limit: 125kHz)
•Vertical
: 50Hz to 160Hz (Lower limit: 47Hz Upper limit: 162Hz)
(2) Memory timing number
•Preset timing
: 10 timing (22 timing max.)
•User timing
: 15 timings can be memorized.
1.7.2
Frequency variation detection function
At normal signal input, this function checks the input frequency and polarity per VSYNC input and judges
that input signal has been transmitted if the conditions a, b and c given below are satisfied 4 times con-
tinuously against the first synchronous signal state.
Condition a: There is no change in the input synchronous signal polarity both in horizontal and
vertical directions.
Condition b: The horizontal frequency difference is less than 0.4kHz.
Condition c: The vertical frequency difference is less than 0.4Hz.
On detecting the change in input signal, this function compares, in the order given below, the directory
data written in EEPROM with the directory data of the input signal before reading and outputting the
screen data.
(1) If the input signals satisfy conditions a, b and c, they are judged to be the same as the
signals registered in the directory, and the timing data are read from EEPROM and are
output.
Condition a: The polarities of the input sync. signal are the same in both horizontal
and vertical directions.
Condition b: Horizontal frequency difference is 0.6kHz
Condition c: Vertical frequency difference is 0.6Hz.
The sequence of the compared directories is as follows:
PRESET1
PRESET2
•••
PRESET10
USER1
USER2
•••
USER15
If the same timing is judged on the way, the comparison work is stopped there, and the
adjustment value for each corresponding timing is read out from EEPROM.
(2) If the conditions of (1) are not satisfied (when the new timing is input), the horizontal
frequency reads the backup picture data of the nearest preset timing and outputs it.
1.7.3
Memory of user timing
The new timing is input. When the picture adjustment is executed, the directory data (fre-
quency and polarity) and picture data will be memorized in EEPROM.
If 15 user timings (MAX) are memorized, the memory of the oldest user timing (directory data
and picture data) is deleted, and the new timing information is memorized there.
USER1
USER2
•••
USER15
USER1
USER2
•••
Summary of Contents for MultiSync FP1355 FP1355 FP1355
Page 23: ...1 17 Q502 Q502 Damper diode Current waveform fh 106k ...
Page 25: ...1 19 Q502 Q502 Damper diode Current waveform Q502 Ic Q502 Vce ...
Page 58: ...1 52 Figure 25 IC211 MC13289ASP block diagram ...
Page 63: ...1 57 Figure 30 IC212 XC3824P2 block diagram ...
Page 65: ...1 59 1 11 Wave form of main circuit voltage ...
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Page 120: ...MultiSync FP1355 User s Manual ...
Page 144: ... VSP C0464 REVISE 2 ...
Page 166: ...Fig 2 BEZEL LOGO VSP C0464 COLOR OF LETTERING Kingfisher Blue 6704 11 5 24 5 66 ...
Page 169: ...VSP C0464 Fig 5 1 PRINTING SPECIFICATION OF CARTON BOX North America ...
Page 170: ...VSP C0464 Fig 5 2 PRINTING SPECIFICATION OF CARTON BOX Europe ...
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