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Renesas PROM Programming Adapters PCA7438F-64A Spezifikationen Seite 33

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Seitenansicht 32
Rev.2.40 Jun 14, 2004 page 33 of 56
38C1 Group
(frequency of count source for LCDCK)
(divider division ratio for LCD)
f(LCDCK)=
f(LCDCK)
duty ratio
Frame frequency=
Fig. 32 LCD display register map
LCD Display register
Address 001016 to 001C16 is the LCD display register. When “1”
are written to these addresses, the corresponding segments of the
LCD display panel are turned on.
LCD Drive Timing
The LCDCK timing frequency (LCD drive timing) is generated in-
ternally and the frame frequency can be determined with the fol-
lowing equation;
COM3 C
O
M
2C
O
M
1COM0C
O
M
3COM2C
O
M
1COM0
0
0
1
C
1
6
0018
16
0
0
1
9
1
6
0
0
1
A
1
6
0
0
1
B
1
6
0
0
1
4
1
6
0015
16
0016
16
0017
16
0
0
1
0
1
6
0011
16
0012
16
0013
16
43
–
SEG
11
S
E
G
1
S
E
G
2
1
S
E
G
2
3
SEG
13
SEG
15
SEG
17
S
E
G
1
9
SEG
3
SEG
5
SEG
7
S
E
G
9
S
E
G
0
SEG
10
SEG
12
SEG
14
SEG
16
S
E
G
1
8
S
E
G
2
0
S
E
G
2
2
S
E
G
2
4
SEG
2
SEG
4
SEG
6
S
E
G
8
0
Bits
Address
765 21
Seitenansicht 32
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