msm9004-01 Oki Semiconductor, msm9004-01 Datasheet - Page 11

• Manufacturer Part Number: msm9004-01
• Description: 1/3, 1/4 Duty Lcd Driver With 4-dot Common Driver And 49-dot Segment Driver
• Manufacturer: Oki Semiconductor

¡ Semiconductor
FUNCTIONAL DESCRIPTION
Display Data Input
Note:
LCD Display Bit - LCD Panel Lighting Status Correspondence Table
LCD Display Bit - Segment Output Correspondence Table
Select Bit - Data Latch Correspondence Table
The select bits C1 to C4 select Data latch 1 to Data latch 4 corresponding to COM 1 to COM 4
independently. If logic "1s" are selected to multiple select bits, the LCD display bits are written
to all corresponding data latches.
Example:
When logic "1s" are set to all select bits C1 to C4, and logic "0s" are set to all LCD display bits D1
to D49, logic "0s" are written to Data latch 1 to Data latch 4 by one data input. This leads to turning
off the entire LCD panel.
LCD display bit
Segment output
CLOCK2
DATA
LOAD
C4
0
0
0
1
LCD display bit
(D1 to D49)
Always set a logic "0" to the dummy bit.
C3
1
0
0
0
1
0
D49
D48 D47 D46 D45
SEG1
C2
D1
0
1
0
0
LCD panel lighting
C1
1
0
0
0
SEG2
LCD display bit
D2
(49 bits)
status
OFF
ON
Display data writing
data latch
Data latch 1
Data latch 2
Data latch 3
Data latch 4
D2
D1
SEG45
D45
0
common output
Corresponding
Dummy bit
(3 bits)
0
COM1
COM2
COM3
COM4
SEG46
D46
0
C1
SEG47
D47
Select bit
C2
(4 bits)
MSM9004-01/02
C3
SEG48
D48
C4
SEG49
D49
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