參數(shù)資料
型號(hào)： ML9050
廠商： OKI SEMICONDUCTOR CO., LTD.
英文描述： 132-Channel LCD Driver with Built-in RAM for LCD Dot Matrix Displays
中文描述： 132通道液晶內(nèi)置液晶點(diǎn)陣顯示RAM的驅(qū)動(dòng)程序
文件頁(yè)數(shù)： 28/71頁(yè)
文件大?。?/td> 472K
代理商： ML9050
Semiconductor
ML9050/9051
28/71
PEDL9050-02
Reset circuit
This LSI goes into the initialized condition when the
RES
input goes to the "L" level. The
initialized condition consists of the following conditions.
(1)
Display OFF
(2)
Normal display mode
(3)
ADC Select: Incremented (ADC command D0 = "L")
(4)
Power control register: (D2, D1, D0) = (0, 0, 0)
(5)
The registers and data in the serial interface are cleared.
(6)
LCD Power supply bias ratio: ML9050 ... 1/9 bias, ML9051 ... 1/8 bias
(7)
Read-modify-write: OFF
(8)
Static indicator: OFF
Static indicator register: (D1, D2) = (0, 0)
(9)
Line 1 is set as the display start line.
(10) The column address is set to address 0.
(11) The page address is set to 0.
(12) Common output state: Normal
(13) Voltage V1 adjustment internal resistor ratio register: (D2, D1, D0) = (1, 0, 0)
(14) The electronic potentiometer register set mode is released.
Electronic potentiometer register: (D5, D4, D3, D2, D1, D0) = (1, 0, 0 ,0, 0, 0)
(15) The LCD drive method is set to the frame reversal method.
Line reversal count register: (D4, D3, D2, D1, D0) = (1, 0, 0, 0, 0)
On the other hand, when the reset command is used, only the conditions (7) to (15) above are set.
As is shown in the "MPU Interface (example for reference)", the
RES
pin is connected to the Reset
pin of the MPU and the initialization of this LSI is made simultaneously with the resetting of the
MPU. This LSI always has to be reset using the
RES
pin at the time the power is switched ON.
Also, excessive current can flow through this LSI when the control signal from the MPU is in the
Hi-Z state. It is necessary to take measures to ensure that the input terminals of this LSI do not
go into the Hi-Z state after the power has been switched ON. When the built-in LCD drive power
supply circuit of the ML9050/9051 is not used, it is necessary that
RES
= "L" when the external
LCD drive power supply goes ON. During the period when
RES
= "L", although the oscillator
circuit is operating, the display timing generator would have stopped and the pins CL, FR, FRS,
and
DOF
would have been tied to the "H" level. There is no effect on the pins D0 to D7.
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PDF描述
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