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ML9058E Datasheet(PDF) 23 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) 23 Page - LAPIS Semiconductor Co., Ltd.

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FEDL9058E-01
LAPIS Semiconductor
ML9058E
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Display Data RAM
 Display data RAM
This is the RAM storing the dot data for display and has an organization of 65 (8 pages
 8 bits +1)  132 bits. It
is possible to access any required bit by specifying the page address and the column address. Since the display data
DB7 to DB0 from the MPU corresponds to the LCD display in the direction of the common lines as shown in Fig.
3, there are fewer restrictions during display data transfer when the ML9058E is used in a multiple chip
configuration, thereby making it easily possible to realize a display with a high degree of freedom. Also, since the
display data RAM read/write from the MPU side is carried out via an I/O buffer, it is done independent of the
signal read operation for the LCD drive. Consequently, the display is not affected by flickering, etc., even when
the display data RAM is accessed asynchronously during the LCD display operation.
DB0
0
1
1
1

0
COM0
DB1
1
0
0
0
0
COM1
DB2
0
0
0
0
0
COM2
DB3
0
1
1
1
0
COM3
DB4
1
0
0
0
0
COM4
Display data RAM
LCD Display
Fig. 3 Relationship between display data RAM and LCD display
 Page address circuit
The page address of the display data RAM is specified using the page address set command as shown in Fig. 4.
Specify the page address again when accessing after changing the page. The page address 8 (DB3, DB2, DB1,
DB0
 1, 0, 0, 0) is the RAM area dedicated to the indicator, and only the display data DB0 is valid in this page.
 Column address circuit
The column address of the display data RAM is specified using the column address set command as shown in Fig.
4. Since the specified column address is incremented (by +1) every time a display data read/write command is
issued, the MPU can access the display data continuously. Further, the incrementing of the column address is
stopped at the column address of 83(H). Since the column address and the page address are independent of each
other, it is necessary, for example, to specify separately the new page address and the new column address when
changing from column 83(H) of page 0 to column 00(H) of page 1. Also, as is shown in Table 5, it is possible to
reverse the correspondence relationship between the display data RAM column address and the segment output
using the ADC command (the segment driver direction select command).
This reduces the IC placement
restrictions at the time of assembling LCD modules.
Table 5 Correspondence relationship between the display data RAM column address
and the segment output
SEGMENT Output
ADC
SEG0
SEG131
DB0 = “0”
0(H)

Column Address
83(H)
DB0 = “1”
83(H)

Column Address
0(H)


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