参数资料
型号: ML9040A-AXXGA
厂商: LAPIS SEMICONDUCTOR CO LTD
元件分类: 显示控制器
英文描述: 16 X 40 DOTS DOT MAT LCD DRVR AND DSPL CTLR, PQFP80
封装: 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件页数: 17/50页
文件大小: 465K
代理商: ML9040A-AXXGA
ML9040A-Axx/-Bxx
Semiconductor
23/49
PEDL9040A-03
Cursor/Blink Control Circuit
This is a circuit that generates the LCD cursor and blink.
This circuit is under the control of the CPU program.
The display of the cursor and blink on the LCD is made at a position corresponding to the
DD RAM address that is set in the ADC.
The figure below shows an example of the cursor/blink position when the value of ADC
is set to "07" (hex.).
(Note) The cursor and blink are displayed even when the CG RAM address is set in the
ADC. For this reason, it is necessary to inhibit the cursor and blink display while
the CG RAM address is set in the ADC.
LCD Display Circuit (COM1 to COM16, SEG1 to SEG40, L, CP, DO, and DF)
As the ML9040A-Axx/-Bxx provides the COM signal outputs (16 outputs) and the SEG
signal outputs (40 outputs), it can display 8 characters (1-line display) or 16 characters (2-
line display) as a unit.
SEG1 to SEG40 are used to display 8-digit display on the LCD. To expand the display, an
MSM5259 is used.
The MSM5259, 40-dot segment driver, is used for expansion of the SEG signal output.
Interface with the MSM5259 is made through data output pin (DO), clock output pin (CP),
latch output pin (L), and display frequency pin (DF). The character pattern data is serially
transferred to MSM5259 through DO and CP. When the data of 72 characters 360-bit (= 5-
bit/ch. x 72 ch. = 1-line display) or 32 characters 160-bit (5-bit/ch. x 32 ch. = 2-line display)
is output, the latch pulse is also output through pin L. By this latch pulse, the data
transferred serially to MSM5259 is latched to be used as display data. The display
frequency signal (DF) required when LCD is displayed is also output from DF pin
synchronously with this latch pulse.
L
DB6
L
ADC
H
DB0
00
First
digit
01
2
02
3
05
4
04
5
In 1-line display mode
05
6
06
7
07
8
7
0
08
9
4E
79
4F
80
Cursor and blink position
00
First
digit
01
2
02
3
03
4
04
5
First line
05
6
06
7
07
8
08
9
26
39
27
40
41
42
43
44
Second line
45
46
47
48
66
67
Cursor and blink position
In 2-line display mode
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