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ML9058E Datasheet(PDF) 26 Page - LAPIS Semiconductor Co., Ltd.

Part # ML9058E
Description  132-Channel LCD Driver
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Manufacturer  LAPIS [LAPIS Semiconductor Co., Ltd.]
Direct Link  http://www.lapis-semi.com/
Logo LAPIS - LAPIS Semiconductor Co., Ltd.

ML9058E Datasheet(HTML) 26 Page - LAPIS Semiconductor Co., Ltd.

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FEDL9058E-01
LAPIS Semiconductor
ML9058E
26/76
Display Timing Generator Circuit
This circuit generates the timing signals for the line address circuit and the display data latch circuit from the
display clock. The display data is latched in the display data latch circuit and is output to the segment drive output
pins in synchronization with the display clock. This circuit generates the timing signals for the line address circuit
and the display data latch circuit from the display clock. The display data is latched in the display data latch circuit
and is output to the segment drive output pins in synchronization with the display clock. The read out of the
display data to the LCD drive circuits is completely independent of the display data RAM access from the MPU.
As a result, there is no bad influence such as flickering on the display even when the display data RAM is accessed
asynchronously during the LCD display. Also, the internal common timing and LCD frame reversal (FR) signals
are generated by this circuit from the display clock. The drive waveforms of the frame reversal drive method
shown in Fig. 5(a) for the LCD drive circuits are generated by this circuit. The drive waveforms of the line reversal
drive method shown in Fig. 5(b) are also generated by the command.
RAM
DATA
VSS
V5
COM1
48 49
1
2
3
4
5
6
V2
V1
VSS
V4
SEGn
V3
V1
44 45 46 47 48 49 1
23
4
5
6
VSS
V5
COM0
V2
V1
FR
LCDCK
(display clock)
Fig. 5(a) Waveforms in the frame reversal drive method


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