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ML9058E Datasheet(PDF) 37 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) 37 Page - LAPIS Semiconductor Co., Ltd.

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FEDL9058E-01
LAPIS Semiconductor
ML9058E
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* When using the voltage V1 adjustment internal resistors or the electronic potentiometer function, it is necessary
to set at least the voltage adjustment circuit and the voltage follower circuits both in the operating state using the
power control setting command. Also, when the voltage multiplier circuit is OFF, it is necessary to supply a
voltage externally to the VOUT pin.
* The pin VR is effective only when the voltage V1 adjustment internal resistors are not used (pin IRS = “L”).
Leave this pin open when the voltage V1 adjustment internal resistors are being used (pin IRS = “H”).
* Since the input impedance of the pin VR is high, it is necessary to take noise countermeasures such as using
short wiring length or a shielded wire .
* The supply current increases in proportion to the panel capacitance. When power consumption increases, the
VOUT level may fall. The voltage (VOUT – V1) should be more than 3 V.
 LCD Drive voltage generator circuits
The voltage V1 is divided using resistors inside the IC to generate the voltages V2, V3, V4, and V5 that are
necessary for driving the LCD. In addition, these voltages V2, V3, V4, and V5 are impedance transformed using
voltage follower circuits and fed to the LCD drive circuits. The bias ratio of 1/9 or 1/7 can be selected using the
LCD bias setting command.
 At built-in power-on, and transition from power save state to display mode
After built-in power-on, at the command "2F(H)" input, or on transition from power save state to display mode, the
display does not operate for a maximum period of 300 ms until the built-in power is stabilized. This period of no
display is not influenced by display ON/OFF command. Despite input of display ON command during this period,
the display does not operate for this period. However, the command is valid. After the wait time is finished, the
display operates. (During this period of no display, all commands are acceptable.)
 Command sequence for shutting off the internal power supply
When shutting off the internal power supply, it is recommended to use the procedure given in Fig. 12 of switching
OFF the power after putting the LSI in the power save state using the following command sequence.
Procedure
Description
Commands
(Command, status)
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Step1
Display OFF
1
0
1
01110
Power save commands


(multiple commands)
Step2
Display all ON
1
0
1
00101


End
Internal power supply OFF
Fig. 12 Command sequence for shutting off the internal power supply


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