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E0C6001 TECHNICAL HARDWARE
I-44
Table 4.6.2 shows the control bits of the LCD driver and
their addresses. Figure 4.6.10 shows the display memory
map.
Control of LCD
driver
CSDC
Display memory
Fig. 4.6.10
Display
memory map
Address
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
090
0A0
Display memory (Write only)
32 words x 4 bits
Table 4.6.2 Control bits of LCD driver
LCD drive switch (0FBH D3)
The LCD drive format can be selected with this switch.
When 1 is written: Static drive
When 0 is written: Dynamic drive
Reading:
Valid
After an initial reset, dynamic drive (CSDC = 0) is selected.
(090H–0AFH)
The LCD segments are turned on or off according to this
data.
When 1 is written: On
When 0 is written: Off
Reading:
Invalid
By writing data into the display memory allocated to the
LCD segment (on the panel), the segment can be turned on
or off. After an initial reset, the contents of the display
memory are undefined.
Address
Comment
Register
D3
D2
D1
D0
Name
SR
1
0
0FBH
CSDC
0
0
0
R
0
LCD drive switch
Static
Dynamic
R/W
CSDC
0
0
0
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