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ML9477TBZAMX

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
FEDL9477-01
ML9477
10/20
POWER-ON/OFF TIMING
If LVDD is in the range of 0 V to LVDDmin, make sure that LVDD DVDD and t 0[ns] are satisfied.
When performing power-on reset with a capacitor connected to the RESET pin, be careful about the relationship
between the capacitance value and the rise time of the power supply.
INITIALIZATION TIMING
Drive the
RESET pin Low and hold it Low under the condition “t1 0[ns]” until LVDD reaches LVDDmin.
The value of the current of the pull-up resistor is specified for
RESET pin.
The customer needs to select an external capacitor that meets the timing requirements shown above.
LVDD
DVDD
Time
Voltage
t
t
LVDD
RESET
VIL
t1
LVDDmin
FEDL9477-01
ML9477
11/20
FUNCTIONAL DESCRIPTION
Description of Operation
Display data input
As described in the section on “Data Structure,” display data consists of a data field, which corresponds to the
LCD segments ON and OFF, and a command field, which indicates the input of display data.
Set a value in each of bits C0 and C1 in the command field according to the common output that corresponds to
the display data, and set a display data input command in the remaining four bits.
Data that has been input to the DATA_IN pin is loaded into the shift register on the rising edges of the CLOCK
pulses, transferrred to the display data latch during the “H” level period of the LOAD pulse, and then output via
the segment driver.
D1 D2 D3 D4 D30 D31 D32 C0 C1 C2 C3 C4
CLOCK
DATA_IN
Old data New data
LOAD
Display output
C5
FEDL9477-01
ML9477
12/20
Display ON, display OFF
Display goes off when power-on reset is executed; therefore, to turn display on, write the display ON command
(F5).
The display OFF command (F4) is a command that makes all segments go off. By writing the display OFF
command, the segments go off irrespective of display data.
The display ON command (F5) is a command that clears a display off state. By writing the display ON command,
display goes back to the previous state.
D1 D2 C4 C2 C3 C4 C5 C2 C3 C4 C5
CLOCK
DATA_IN
LOAD
Display ON/OFF
C5
R
ESET
Input of display
data
Write
display ON
command
Write display
OFF command
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

ML9477TBZAMX

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IC LCD DRIVER MATRIX 48QFP
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